Stop using certain lodash methods.

* _.isNil
* _.noop
* _.isNull

.eslintrc.json

@@ -28,14 +28,15 @@
             ]
         }],
         "lodash/import-scope": "off",
-        "lodash/prefer-invoke-map": "off",
-        "lodash/prefer-startswith": "off",
         "lodash/prefer-constant": "off",
-        "lodash/prefer-noop": "off",
-        "lodash/prefer-lodash-typecheck": "off",
+        "lodash/prefer-get": "off",
         "lodash/prefer-includes": "off",
+        "lodash/prefer-invoke-map": "off",
+        "lodash/prefer-is-nil": "off",
+        "lodash/prefer-lodash-typecheck": "off",
+        "lodash/prefer-noop": "off",
+        "lodash/prefer-startswith": "off",
         "lodash/preferred-alias": "off",
-        "lodash/prefer-get": "off",
         "accessor-pairs": "error",
         "array-bracket-spacing": "off",
         "array-callback-return": "error",

spec/autocomplete.js

@@ -41,8 +41,8 @@
             const textarea = view.el.querySelector('textarea.chat-textarea');
             const at_event = {
                 'target': textarea,
-                'preventDefault': _.noop,
-                'stopPropagation': _.noop,
+                'preventDefault': function noop () {},
+                'stopPropagation': function noop () {},
                 'keyCode': 50,
                 'key': '@'
             };
@@ -84,8 +84,8 @@
             // Press tab
             const tab_event = {
                 'target': textarea,
-                'preventDefault': _.noop,
-                'stopPropagation': _.noop,
+                'preventDefault': function noop () {},
+                'stopPropagation': function noop () {},
                 'keyCode': 9,
                 'key': 'Tab'
             }
@@ -97,7 +97,7 @@
 
             const backspace_event = {
                 'target': textarea,
-                'preventDefault': _.noop,
+                'preventDefault': function noop () {},
                 'keyCode': 8
             }
             for (var i=0; i<3; i++) {
@@ -129,7 +129,7 @@
             const up_arrow_event = {
                 'target': textarea,
                 'preventDefault': () => (up_arrow_event.defaultPrevented = true),
-                'stopPropagation': _.noop,
+                'stopPropagation': function noop () {},
                 'keyCode': 38
             }
             view.onKeyDown(up_arrow_event);
@@ -140,8 +140,8 @@
 
             view.onKeyDown({
                 'target': textarea,
-                'preventDefault': _.noop,
-                'stopPropagation': _.noop,
+                'preventDefault': function noop () {},
+                'stopPropagation': function noop () {},
                 'keyCode': 13 // Enter
             });
             expect(textarea.value).toBe('hello s @some2 ');
@@ -195,8 +195,8 @@
             // Press backspace
             const backspace_event = {
                 'target': textarea,
-                'preventDefault': _.noop,
-                'stopPropagation': _.noop,
+                'preventDefault': function noop () {},
+                'stopPropagation': function noop () {},
                 'keyCode': 8,
                 'key': 'Backspace'
             }

spec/chatbox.js

@@ -497,7 +497,7 @@
                     const textarea = view.el.querySelector('.chat-textarea');
                     const ev = {
                         target: textarea,
-                        preventDefault: _.noop,
+                        preventDefault: function noop () {},
                         keyCode: 13 // Enter
                     };
                     view.onKeyDown(ev);
@@ -546,7 +546,7 @@
                     let view = _converse.chatboxviews.get(contact_jid);
                     toolbar = view.el.querySelector('ul.chat-toolbar');
                     call_button = toolbar.querySelector('.toggle-call');
-                    expect(_.isNull(call_button)).toBeTruthy();
+                    expect(call_button === null).toBeTruthy();
                     view.close();
                     // Now check that it's shown if enabled and that it emits
                     // callButtonClicked
@@ -1167,7 +1167,7 @@
                 view.el.querySelector('.chat-textarea').value = message;
                 view.onKeyDown({
                     target: view.el.querySelector('textarea.chat-textarea'),
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(view.clearMessages).toHaveBeenCalled();

spec/controlbox.js

@@ -267,7 +267,7 @@
                 async function (done, _converse) {
 
             const xhr = {
-                'open': _.noop,
+                'open': function noop () {},
                 'send': function () {
                     xhr.responseText = JSON.stringify([
                         {"jid": "marty@mcfly.net", "fullname": "Marty McFly"},
@@ -328,7 +328,7 @@
             test_utils.createContacts(_converse, 'all').openControlBox();
             var modal;
             const xhr = {
-                'open': _.noop,
+                'open': function noop () {},
                 'send': function () {
                     const value = modal.el.querySelector('input[name="name"]').value;
                     if (value === 'existing') {

spec/messages.js

@@ -27,7 +27,7 @@
             textarea.value = 'But soft, what light through yonder airlock breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -55,7 +55,7 @@
             textarea.value = 'But soft, what light through yonder window breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             expect(_converse.connection.send).toHaveBeenCalled();
@@ -161,7 +161,7 @@
             textarea.value = 'But soft, what light through yonder airlock breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -184,7 +184,7 @@
             textarea.value = 'But soft, what light through yonder window breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             expect(_converse.connection.send).toHaveBeenCalled();
@@ -237,7 +237,7 @@
             textarea.value = 'It is the east, and Juliet is the one.';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -246,7 +246,7 @@
             textarea.value =  'Arise, fair sun, and kill the envious moon';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -277,7 +277,7 @@
             textarea.value = 'It is the east, and Juliet is the sun.';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.model.messages.once('rendered', resolve));
@@ -1331,7 +1331,7 @@
                 textarea.value = 'But soft, what light through yonder airlock breaks?';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13 // Enter
                 });
                 await u.waitUntil(() => _converse.api.chats.get().length);
@@ -1354,7 +1354,7 @@
                 textarea.value = 'Another message';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13 // Enter
                 });
                 await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -2537,7 +2537,7 @@
             textarea.value = 'But soft, what light through yonder airlock breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -2561,7 +2561,7 @@
             textarea.value = 'But soft, what light through yonder window breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             expect(_converse.connection.send).toHaveBeenCalled();
@@ -2636,7 +2636,7 @@
             textarea.value = 'But soft, what light through yonder airlock breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -2715,7 +2715,7 @@
             textarea.value = 'But soft, what light through yonder airlock breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -2751,7 +2751,7 @@
             textarea.value = 'But soft, what light through yonder airlock breaks?';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -2996,8 +2996,8 @@
                 textarea.value = 'hello @z3r0 @gibson @mr.robot, how are you?'
                 const enter_event = {
                     'target': textarea,
-                    'preventDefault': _.noop,
-                    'stopPropagation': _.noop,
+                    'preventDefault': function noop () {},
+                    'stopPropagation': function noop () {},
                     'keyCode': 13 // Enter
                 }
                 spyOn(_converse.connection, 'send');
@@ -3074,8 +3074,8 @@
                 textarea.value = 'hello @z3r0 @gibson @mr.robot, how are you?'
                 const enter_event = {
                     'target': textarea,
-                    'preventDefault': _.noop,
-                    'stopPropagation': _.noop,
+                    'preventDefault': function noop () {},
+                    'stopPropagation': function noop () {},
                     'keyCode': 13 // Enter
                 }
                 view.onKeyDown(enter_event);

spec/minchats.js

@@ -87,7 +87,7 @@
             _converse.minimized_chats.toggleview.model.set({'collapsed': true});
 
             const unread_el = _converse.minimized_chats.toggleview.el.querySelector('.unread-message-count');
-            expect(_.isNull(unread_el)).toBe(true);
+            expect(unread_el === null).toBe(true);
 
             for (i=0; i<3; i++) {
                 contact_jid = mock.cur_names[i].replace(/ /g,'.').toLowerCase() + '@montague.lit';

spec/muc.js

@@ -2011,7 +2011,7 @@
                 textarea.value = text;
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -2864,7 +2864,7 @@
                 const textarea = view.el.querySelector('.chat-textarea');
                 textarea.value = '/clear';
 
-                const enter = { 'target': textarea, 'preventDefault': _.noop, 'keyCode': 13 };
+                const enter = { 'target': textarea, 'preventDefault': function noop () {}, 'keyCode': 13 };
                 view.onKeyDown(enter);
                 textarea.value = '/help';
                 view.onKeyDown(enter);
@@ -2935,7 +2935,7 @@
                 await test_utils.openAndEnterChatRoom(_converse, 'lounge@montague.lit', 'romeo');
                 const view = _converse.chatboxviews.get('lounge@montague.lit');
                 var textarea = view.el.querySelector('.chat-textarea');
-                const enter = { 'target': textarea, 'preventDefault': _.noop, 'keyCode': 13 };
+                const enter = { 'target': textarea, 'preventDefault': function noop () {}, 'keyCode': 13 };
                 spyOn(window, 'confirm').and.callFake(() => true);
                 textarea.value = '/clear';
                 view.onKeyDown(enter);
@@ -2999,7 +2999,7 @@
                 textarea.value = '/member chris Welcome to the club!';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(_converse.connection.send).not.toHaveBeenCalled();
@@ -3011,7 +3011,7 @@
                 textarea.value = '/member marc Welcome to the club!';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(_converse.connection.send).toHaveBeenCalled();
@@ -3126,7 +3126,7 @@
                 textarea.value = '/topic This is the groupchat subject';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(_converse.connection.send).toHaveBeenCalled();
@@ -3136,7 +3136,7 @@
                 textarea.value = '/subject This is a new subject';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
 
@@ -3150,7 +3150,7 @@
                 textarea.value = '/Subject This is yet another subject';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(sent_stanza.textContent).toBe('This is yet another subject');
@@ -3173,7 +3173,7 @@
                 textarea.value = '/clear';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(view.clearMessages).toHaveBeenCalled();
@@ -3215,7 +3215,7 @@
                 textarea.value = '/owner';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(view.validateRoleOrAffiliationChangeArgs).toHaveBeenCalled();
@@ -3303,7 +3303,7 @@
                 textarea.value = '/ban';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(view.validateRoleOrAffiliationChangeArgs).toHaveBeenCalled();
@@ -3404,7 +3404,7 @@
                 textarea.value = '/kick';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 expect(view.validateRoleOrAffiliationChangeArgs).toHaveBeenCalled();
@@ -3508,7 +3508,7 @@
                 textarea.value = '/op';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
 
@@ -3651,7 +3651,7 @@
                 textarea.value = '/mute';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
 
@@ -5250,7 +5250,7 @@
                 view.model.features.set('moderated', false);
                 expect(view.el.querySelector('.muc-bottom-panel')).toBe(null);
                 let textarea = view.el.querySelector('.chat-textarea');
-                expect(_.isNull(textarea)).toBe(false);
+                expect(textarea === null).toBe(false);
 
                 view.model.features.set('moderated', true);
                 expect(view.el.querySelector('.chat-textarea')).toBe(null);
@@ -5281,7 +5281,7 @@
                 expect(bottom_panel).toBe(null);
 
                 textarea = view.el.querySelector('.chat-textarea');
-                expect(_.isNull(textarea)).toBe(false);
+                expect(textarea === null).toBe(false);
 
                 expect(info_msgs.length).toBe(3);
                 expect(info_msgs[2].textContent).toBe("troll has been given a voice");

spec/omemo.js

@@ -126,7 +126,7 @@
             textarea.value = 'This message will be encrypted';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             iq_stanza = await u.waitUntil(() => bundleFetched(_converse, contact_jid, '555'));
@@ -310,7 +310,7 @@
             textarea.value = 'This message will be encrypted';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             iq_stanza = await u.waitUntil(() => bundleFetched(_converse, contact_jid, '4e30f35051b7b8b42abe083742187228'), 1000);
@@ -458,7 +458,7 @@
             textarea.value = 'This is an encrypted message from this device';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             iq_stanza = await u.waitUntil(() => bundleFetched(_converse, _converse.bare_jid, '988349631'));
@@ -515,7 +515,7 @@
             textarea.value = 'This message will be encrypted';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13 // Enter
             });
             let iq_stanza = await u.waitUntil(() => deviceListFetched(_converse, contact_jid));
@@ -1232,7 +1232,7 @@
             const toolbar = view.el.querySelector('.chat-toolbar');
             expect(view.model.get('omemo_active')).toBe(undefined);
             let toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(false);
+            expect(toggle === null).toBe(false);
             expect(u.hasClass('fa-unlock', toggle)).toBe(true);
             expect(u.hasClass('fa-lock', toggle)).toBe(false);
 
@@ -1251,7 +1251,7 @@
             textarea.value = 'This message will be sent encrypted';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13
             });
 
@@ -1298,7 +1298,7 @@
             const toolbar = view.el.querySelector('.chat-toolbar');
             let toggle = toolbar.querySelector('.toggle-omemo');
             expect(view.model.get('omemo_active')).toBe(undefined);
-            expect(_.isNull(toggle)).toBe(false);
+            expect(toggle === null).toBe(false);
             expect(u.hasClass('fa-unlock', toggle)).toBe(true);
             expect(u.hasClass('fa-lock', toggle)).toBe(false);
             expect(u.hasClass('disabled', toggle)).toBe(false);
@@ -1356,7 +1356,7 @@
 
             expect(view.model.get('omemo_active')).toBe(true);
             toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(false);
+            expect(toggle === null).toBe(false);
             expect(u.hasClass('fa-unlock', toggle)).toBe(false);
             expect(u.hasClass('fa-lock', toggle)).toBe(true);
             expect(u.hasClass('disabled', toggle)).toBe(false);
@@ -1367,13 +1367,13 @@
             view.model.features.save({'nonanonymous': false, 'semianonymous': true});
             await u.waitUntil(() => !view.model.get('omemo_supported'));
             toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(true);
+            expect(toggle === null).toBe(true);
             expect(view.model.get('omemo_supported')).toBe(false);
 
             view.model.features.save({'nonanonymous': true, 'semianonymous': false});
             await u.waitUntil(() => view.model.get('omemo_supported'));
             toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(false);
+            expect(toggle === null).toBe(false);
             expect(u.hasClass('fa-unlock', toggle)).toBe(true);
             expect(u.hasClass('fa-lock', toggle)).toBe(false);
             expect(u.hasClass('disabled', toggle)).toBe(false);
@@ -1382,12 +1382,12 @@
             view.model.features.save({'membersonly': false, 'open': true});
             await u.waitUntil(() => !view.model.get('omemo_supported'));
             toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(true);
+            expect(toggle === null).toBe(true);
 
             view.model.features.save({'membersonly': true, 'open': false});
             await u.waitUntil(() => view.model.get('omemo_supported'));
             toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(false);
+            expect(toggle === null).toBe(false);
             expect(u.hasClass('fa-unlock', toggle)).toBe(true);
             expect(u.hasClass('fa-lock', toggle)).toBe(false);
             expect(u.hasClass('disabled', toggle)).toBe(false);
@@ -1436,7 +1436,7 @@
             );
 
             toggle = toolbar.querySelector('.toggle-omemo');
-            expect(_.isNull(toggle)).toBe(false);
+            expect(toggle === null).toBe(false);
             expect(u.hasClass('fa-unlock', toggle)).toBe(true);
             expect(u.hasClass('fa-lock', toggle)).toBe(false);
             expect(u.hasClass('disabled', toggle)).toBe(true);

spec/room_registration.js

@@ -24,7 +24,7 @@
                 textarea.value = '/register';
                 view.onKeyDown({
                     target: textarea,
-                    preventDefault: _.noop,
+                    preventDefault: function noop () {},
                     keyCode: 13
                 });
                 let stanza = await u.waitUntil(() => _.filter(

spec/roomslist.js

@@ -337,7 +337,7 @@
             // When the chat gets maximized again, the unread indicators are removed
             view.model.set({'minimized': false});
             indicator_el = _converse.rooms_list_view.el.querySelector(".msgs-indicator");
-            expect(_.isNull(indicator_el));
+            expect(indicator_el === null);
             room_el = _converse.rooms_list_view.el.querySelector(".available-chatroom");
             expect(_.includes(room_el.classList, 'unread-msgs')).toBeFalsy();
             done();

spec/roster.js

@@ -121,7 +121,7 @@
 
                 const filter = _converse.rosterview.el.querySelector('.roster-filter');
                 test_utils.openControlBox();
-                expect(_.isNull(filter)).toBe(false);
+                expect(filter === null).toBe(false);
                 test_utils.createContacts(_converse, 'current').openControlBox();
 
                 const view = _converse.chatboxviews.get('controlbox');

spec/spoilers.js

@@ -111,7 +111,7 @@
             textarea.value = 'This is the spoiler';
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -130,7 +130,7 @@
              */
             const stanza = _converse.connection.send.calls.argsFor(0)[0].tree();
             const spoiler_el = stanza.querySelector('spoiler[xmlns="urn:xmpp:spoiler:0"]');
-            expect(_.isNull(spoiler_el)).toBeFalsy();
+            expect(spoiler_el === null).toBeFalsy();
             expect(spoiler_el.textContent).toBe('');
 
             const body_el = stanza.querySelector('body');
@@ -188,7 +188,7 @@
 
             view.onKeyDown({
                 target: textarea,
-                preventDefault: _.noop,
+                preventDefault: function noop () {},
                 keyCode: 13
             });
             await new Promise((resolve, reject) => view.once('messageInserted', resolve));
@@ -208,7 +208,7 @@
             const stanza = _converse.connection.send.calls.argsFor(0)[0].tree();
             const spoiler_el = stanza.querySelector('spoiler[xmlns="urn:xmpp:spoiler:0"]');
 
-            expect(_.isNull(spoiler_el)).toBeFalsy();
+            expect(spoiler_el === null).toBeFalsy();
             expect(spoiler_el.textContent).toBe('This is the hint');
 
             const body_el = stanza.querySelector('body');

spec/user-details-modal.js

@@ -43,7 +43,7 @@
             show_modal_button = view.el.querySelector('.show-user-details-modal');
             show_modal_button.click();
             remove_contact_button = modal.el.querySelector('button.remove-contact');
-            expect(_.isNull(remove_contact_button)).toBeTruthy();
+            expect(remove_contact_button === null).toBeTruthy();
             done();
         }));
 

src/converse-bookmark-views.js

@@ -280,7 +280,7 @@ converse.plugins.add('converse-bookmark-views', {
                 const controlboxview = _converse.chatboxviews.get('controlbox');
                 if (controlboxview !== undefined && !u.rootContains(_converse.root, this.el)) {
                     const el = controlboxview.el.querySelector('.bookmarks-list');
-                    if (!_.isNull(el)) {
+                    if (el !== null) {
                         el.parentNode.replaceChild(this.el, el);
                     }
                 }
@@ -301,13 +301,10 @@ converse.plugins.add('converse-bookmark-views', {
 
             renderBookmarkListElement (chatbox) {
                 const bookmarkview = this.get(chatbox.get('jid'));
-                if (_.isNil(bookmarkview)) {
-                    // A chat box has been closed, but we don't have a
-                    // bookmark for it, so nothing further to do here.
-                    return;
-                }
+                if (bookmarkview) {
                     bookmarkview.render();
                     this.showOrHide();
+                }
             },
 
             showOrHide (item) {

src/converse-chatboxviews.js

@@ -23,7 +23,7 @@ const AvatarMixin = {
     renderAvatar (el) {
         el = el || this.el;
         const avatar_el = el.querySelector('canvas.avatar, svg.avatar');
-        if (_.isNull(avatar_el)) {
+        if (avatar_el === null) {
             return;
         }
         if (this.model.vcard) {
@@ -91,7 +91,7 @@ converse.plugins.add('converse-chatboxviews', {
                  */
                 if (!this.el) {
                     let el = _converse.root.querySelector('#conversejs');
-                    if (_.isNull(el)) {
+                    if (el === null) {
                         el = document.createElement('div');
                         el.setAttribute('id', 'conversejs');
                         u.addClass(`theme-${_converse.theme}`, el);

src/converse-chatview.js

@@ -589,7 +589,7 @@ converse.plugins.add('converse-chatview', {
             },
 
             addSpinner (append=false) {
-                if (_.isNull(this.el.querySelector('.spinner'))) {
+                if (this.el.querySelector('.spinner') === null) {
                     if (append) {
                         this.content.insertAdjacentHTML('beforeend', tpl_spinner());
                         this.scrollDown();
@@ -615,14 +615,13 @@ converse.plugins.add('converse-chatview', {
              *      which specifies its creation date.
              */
             insertDayIndicator (next_msg_el) {
-                const prev_msg_el = u.getPreviousElement(next_msg_el, ".message:not(.chat-state-notification)"),
-                      prev_msg_date = _.isNull(prev_msg_el) ? null : prev_msg_el.getAttribute('data-isodate'),
-                      next_msg_date = next_msg_el.getAttribute('data-isodate');
-
-                if (_.isNull(prev_msg_date) && _.isNull(next_msg_date)) {
+                const prev_msg_el = u.getPreviousElement(next_msg_el, ".message:not(.chat-state-notification)");
+                const prev_msg_date = (prev_msg_el === null) ? null : prev_msg_el.getAttribute('data-isodate');
+                const next_msg_date = next_msg_el.getAttribute('data-isodate');
+                if (prev_msg_date === null && next_msg_date === null) {
                     return;
                 }
-                if (_.isNull(prev_msg_date) || dayjs(next_msg_date).isAfter(prev_msg_date, 'day')) {
+                if ((prev_msg_date === null) || dayjs(next_msg_date).isAfter(prev_msg_date, 'day')) {
                     const day_date = dayjs(next_msg_date).startOf('day');
                     next_msg_el.insertAdjacentHTML('beforeBegin',
                         tpl_new_day({
@@ -644,12 +643,12 @@ converse.plugins.add('converse-chatview', {
             getLastMessageDate (cutoff) {
                 const first_msg = u.getFirstChildElement(this.content, '.message:not(.chat-state-notification)');
                 const oldest_date = first_msg ? first_msg.getAttribute('data-isodate') : null;
-                if (!_.isNull(oldest_date) && dayjs(oldest_date).isAfter(cutoff)) {
+                if (oldest_date !== null && dayjs(oldest_date).isAfter(cutoff)) {
                     return null;
                 }
                 const last_msg = u.getLastChildElement(this.content, '.message:not(.chat-state-notification)');
                 const most_recent_date = last_msg ? last_msg.getAttribute('data-isodate') : null;
-                if (_.isNull(most_recent_date)) {
+                if (most_recent_date === null) {
                     return null;
                 }
                 if (dayjs(most_recent_date).isBefore(cutoff)) {
@@ -740,7 +739,7 @@ converse.plugins.add('converse-chatview', {
                 const current_msg_date = dayjs(view.model.get('time')).toDate() || new Date(),
                       previous_msg_date = this.getLastMessageDate(current_msg_date);
 
-                if (_.isNull(previous_msg_date)) {
+                if (previous_msg_date === null) {
                     this.content.insertAdjacentElement('afterbegin', view.el);
                 } else {
                     const previous_msg_el = sizzle(`[data-isodate="${previous_msg_date.toISOString()}"]:last`, this.content).pop();
@@ -1040,14 +1039,14 @@ converse.plugins.add('converse-chatview', {
 
                 const textarea = this.el.querySelector('.chat-textarea');
                 if (textarea.value &&
-                        (currently_correcting === null || currently_correcting.get('message') !== textarea.value)) {
+                        ((currently_correcting === null) || currently_correcting.get('message') !== textarea.value)) {
                     if (! confirm(__("You have an unsent message which will be lost if you continue. Are you sure?"))) {
                         return;
                     }
                 }
 
                 if (currently_correcting !== message) {
-                    if (!_.isNil(currently_correcting)) {
+                    if (currently_correcting !== null) {
                         currently_correcting.save('correcting', false);
                     }
                     message.save('correcting', true);
@@ -1277,7 +1276,7 @@ converse.plugins.add('converse-chatview', {
 
             insertEmojiPicker () {
                 var picker_el = this.el.querySelector('.emoji-picker');
-                if (!_.isNull(picker_el)) {
+                if (picker_el !== null) {
                     picker_el.innerHTML = '';
                     picker_el.appendChild(this.emoji_picker_view.el);
                 }
@@ -1346,7 +1345,7 @@ converse.plugins.add('converse-chatview', {
 
             hideNewMessagesIndicator () {
                 const new_msgs_indicator = this.el.querySelector('.new-msgs-indicator');
-                if (!_.isNull(new_msgs_indicator)) {
+                if (new_msgs_indicator !== null) {
                     new_msgs_indicator.classList.add('hidden');
                 }
             },

src/converse-controlbox.js

@@ -172,7 +172,7 @@ converse.plugins.add('converse-controlbox', {
                 }
             },
 
-            onReconnection: _.noop
+            onReconnection: function noop () {}
         });
 
 
@@ -245,7 +245,7 @@ converse.plugins.add('converse-controlbox', {
 
             insertBrandHeading () {
                 const heading_el = this.el.querySelector('.brand-heading-container');
-                if (_.isNull(heading_el)) {
+                if (heading_el === null) {
                     const el = this.el.querySelector('.controlbox-head');
                     el.insertAdjacentHTML('beforeend', this.createBrandHeadingHTML());
                 } else {
@@ -255,7 +255,9 @@ converse.plugins.add('converse-controlbox', {
 
             renderLoginPanel () {
                 this.el.classList.add("logged-out");
-                if (_.isNil(this.loginpanel)) {
+                if (this.loginpanel) {
+                    this.loginpanel.render();
+                } else {
                     this.loginpanel = new _converse.LoginPanel({
                         'model': new _converse.LoginPanelModel()
                     });
@@ -263,8 +265,6 @@ converse.plugins.add('converse-controlbox', {
                     panes.innerHTML = '';
                     panes.appendChild(this.loginpanel.render().el);
                     this.insertBrandHeading();
-                } else {
-                    this.loginpanel.render();
                 }
                 this.loginpanel.initPopovers();
                 return this;

src/converse-dragresize.js

@@ -221,7 +221,7 @@ converse.plugins.add('converse-dragresize', {
                     height = "";
                 }
                 const flyout_el = this.el.querySelector('.box-flyout');
-                if (!_.isNull(flyout_el)) {
+                if (flyout_el !== null) {
                     flyout_el.style.height = height;
                 }
             },
@@ -234,7 +234,7 @@ converse.plugins.add('converse-dragresize', {
                 }
                 this.el.style.width = width;
                 const flyout_el = this.el.querySelector('.box-flyout');
-                if (!_.isNull(flyout_el)) {
+                if (flyout_el !== null) {
                     flyout_el.style.width = width;
                 }
             },

src/converse-headline.js

@@ -112,8 +112,8 @@ converse.plugins.add('converse-headline', {
             },
 
             // Override to avoid the methods in converse-chatview.js
-            'renderMessageForm': _.noop,
-            'afterShown': _.noop
+            'renderMessageForm': function noop () {},
+            'afterShown': function noop () {}
         });
 
         async function onHeadlineMessage (message) {

src/converse-message-view.js

@@ -177,7 +177,7 @@ converse.plugins.add('converse-message-view', {
             },
 
             replaceElement (msg) {
-                if (!_.isNil(this.el.parentElement)) {
+                if (this.el.parentElement) {
                     this.el.parentElement.replaceChild(msg, this.el);
                 }
                 this.setElement(msg);

src/converse-modal.js

@@ -28,11 +28,7 @@ converse.plugins.add('converse-modal', {
                     backdrop: 'static',
                     keyboard: true
                 });
-                this.el.addEventListener('hide.bs.modal', (event) => {
-                    if (!_.isNil(this.trigger_el)) {
-                        this.trigger_el.classList.remove('selected');
-                    }
-                }, false);
+                this.el.addEventListener('hide.bs.modal', () => u.removeClass('selected', this.trigger_el), false);
             },
 
             insertIntoDOM () {

src/converse-muc-views.js

@@ -1138,7 +1138,7 @@ converse.plugins.add('converse-muc-views', {
 
             hideChatRoomContents () {
                 const container_el = this.el.querySelector('.chatroom-body');
-                if (!_.isNull(container_el)) {
+                if (container_el !== null) {
                     [].forEach.call(container_el.children, child => child.classList.add('hidden'));
                 }
             },
@@ -1248,7 +1248,7 @@ converse.plugins.add('converse-muc-views', {
 
             getNotificationWithMessage (message) {
                 let el = this.content.lastElementChild;
-                while (!_.isNil(el)) {
+                while (el) {
                     const data = _.get(el, 'dataset', {});
                     if (!_.includes(_.get(el, 'classList', []), 'chat-info')) {
                         return;
@@ -1342,10 +1342,10 @@ converse.plugins.add('converse-muc-views', {
 
                 if (data.leave === nick) {
                     let message;
-                    if (_.isNil(stat)) {
-                        message = __('%1$s has left and re-entered the groupchat', nick);
-                    } else {
+                    if (stat) {
                         message = __('%1$s has left and re-entered the groupchat. "%2$s"', nick, stat);
+                    } else {
+                        message = __('%1$s has left and re-entered the groupchat', nick);
                     }
                     const data = {
                         'data_name': 'leavejoin',
@@ -1361,10 +1361,10 @@ converse.plugins.add('converse-muc-views', {
                     setTimeout(() => el.parentElement && el.parentElement.removeChild(el), 5500);
                 } else {
                     let message;
-                    if (_.isNil(stat)) {
-                        message = __('%1$s has entered the groupchat', nick);
-                    } else {
+                    if (stat) {
                         message = __('%1$s has entered the groupchat. "%2$s"', nick, stat);
+                    } else {
+                        message = __('%1$s has entered the groupchat', nick);
                     }
                     const data = {
                         'data_name': 'join',
@@ -1397,10 +1397,10 @@ converse.plugins.add('converse-muc-views', {
 
                 if (dataset.join === nick) {
                     let message;
-                    if (_.isNil(stat)) {
-                        message = __('%1$s has entered and left the groupchat', nick);
-                    } else {
+                    if (stat) {
                         message = __('%1$s has entered and left the groupchat. "%2$s"', nick, stat);
+                    } else {
+                        message = __('%1$s has entered and left the groupchat', nick);
                     }
                     const data = {
                         'data_name': 'joinleave',
@@ -1416,10 +1416,10 @@ converse.plugins.add('converse-muc-views', {
                     setTimeout(() => el.parentElement && el.parentElement.removeChild(el), 5500);
                 } else {
                     let message;
-                    if (_.isNil(stat)) {
-                        message = __('%1$s has left the groupchat', nick);
-                    } else {
+                    if (stat) {
                         message = __('%1$s has left the groupchat. "%2$s"', nick, stat);
+                    } else {
+                        message = __('%1$s has left the groupchat', nick);
                     }
                     const data = {
                         'message': message,
@@ -1469,7 +1469,7 @@ converse.plugins.add('converse-muc-views', {
                  * list are both visible.
                  */
                 const spinner = this.el.querySelector('.spinner');
-                if (!_.isNull(spinner)) {
+                if (spinner !== null) {
                     u.removeElement(spinner);
                     this.renderAfterTransition();
                 }
@@ -1757,7 +1757,7 @@ converse.plugins.add('converse-muc-views', {
             renderInviteWidget () {
                 const widget = this.el.querySelector('.room-invite');
                 if (this.shouldInviteWidgetBeShown()) {
-                    if (_.isNull(widget)) {
+                    if (widget === null) {
                         const heading = this.el.querySelector('.occupants-heading');
                         heading.insertAdjacentHTML(
                             'afterend',
@@ -1768,7 +1768,7 @@ converse.plugins.add('converse-muc-views', {
                         );
                         this.initInviteWidget();
                     }
-                } else if (!_.isNull(widget)) {
+                } else if (widget !== null) {
                     widget.remove();
                 }
                 return this;
@@ -1809,7 +1809,7 @@ converse.plugins.add('converse-muc-views', {
                 const form = this.el.querySelector('.room-invite form'),
                       input = form.querySelector('.invited-contact'),
                       error = form.querySelector('.error');
-                if (!_.isNull(error)) {
+                if (error !== null) {
                     error.parentNode.removeChild(error);
                 }
                 input.value = '';
@@ -1844,7 +1844,7 @@ converse.plugins.add('converse-muc-views', {
 
             initInviteWidget () {
                 const form = this.el.querySelector('.room-invite form');
-                if (_.isNull(form)) {
+                if (form === null) {
                     return;
                 }
                 form.addEventListener('submit', this.inviteFormSubmitted.bind(this), false);

src/converse-notification.js

@@ -62,7 +62,7 @@ converse.plugins.add('converse-notification', {
             }
             const room = _converse.chatboxes.get(room_jid);
             const body = message.querySelector('body');
-            if (_.isNull(body)) {
+            if (body === null) {
                 return false;
             }
             const mentioned = (new RegExp(`\\b${room.get('nick')}\\b`)).test(body.textContent);
@@ -76,10 +76,9 @@ converse.plugins.add('converse-notification', {
 
         _converse.isMessageToHiddenChat = function (message) {
             if (_converse.isUniView()) {
-                const jid = Strophe.getBareJidFromJid(message.getAttribute('from')),
-                      view = _converse.chatboxviews.get(jid);
-
-                if (!_.isNil(view)) {
+                const jid = Strophe.getBareJidFromJid(message.getAttribute('from'));
+                const view = _converse.chatboxviews.get(jid);
+                if (view) {
                     return view.model.get('hidden') || _converse.windowState === 'hidden' || !u.isVisible(view.el);
                 }
                 return true;
@@ -89,7 +88,7 @@ converse.plugins.add('converse-notification', {
 
         _converse.shouldNotifyOfMessage = function (message) {
             const forwarded = message.querySelector('forwarded');
-            if (!_.isNull(forwarded)) {
+            if (forwarded !== null) {
                 return false;
             } else if (message.getAttribute('type') === 'groupchat') {
                 return _converse.shouldNotifyOfGroupMessage(message);

src/converse-oauth.js

@@ -78,7 +78,7 @@ converse.plugins.add("converse-oauth", {
         });
 
         _converse.OAuthProviders = _converse.Collection.extend({
-            'sync': __.noop,
+            'sync': _function noop () {},
 
             initialize () {
                 _.each(_converse.user_settings.oauth_providers, (provider) => {

src/converse-omemo.js

@@ -70,7 +70,7 @@ function parseBundle (bundle_el) {
 converse.plugins.add('converse-omemo', {
 
     enabled (_converse) {
-        return !_.isNil(window.libsignal) && !_converse.blacklisted_plugins.includes('converse-omemo') && _converse.config.get('trusted');
+        return window.libsignal && !_converse.blacklisted_plugins.includes('converse-omemo') && _converse.config.get('trusted');
     },
 
     dependencies: ["converse-chatview", "converse-pubsub"],
@@ -696,7 +696,7 @@ converse.plugins.add('converse-omemo', {
             },
 
             isTrustedIdentity (identifier, identity_key, direction) {
-                if (_.isNil(identifier)) {
+                if (identifier === null || identifier === undefined) {
                     throw new Error("Can't check identity key for invalid key");
                 }
                 if (!(identity_key instanceof ArrayBuffer)) {
@@ -710,14 +710,14 @@ converse.plugins.add('converse-omemo', {
             },
 
             loadIdentityKey (identifier) {
-                if (_.isNil(identifier)) {
+                if (identifier === null || identifier === undefined) {
                     throw new Error("Can't load identity_key for invalid identifier");
                 }
                 return Promise.resolve(u.base64ToArrayBuffer(this.get('identity_key'+identifier)));
             },
 
             saveIdentity (identifier, identity_key) {
-                if (_.isNil(identifier)) {
+                if (identifier === null || identifier === undefined) {
                     throw new Error("Can't save identity_key for invalid identifier");
                 }
                 const address = new libsignal.SignalProtocolAddress.fromString(identifier),
@@ -1104,7 +1104,7 @@ converse.plugins.add('converse-omemo', {
         async function fetchOwnDevices () {
             await fetchDeviceLists();
             let own_devicelist = _converse.devicelists.get(_converse.bare_jid);
-            if (_.isNil(own_devicelist)) {
+            if (!own_devicelist) {
                 own_devicelist = _converse.devicelists.create({'jid': _converse.bare_jid});
             }
             return own_devicelist.fetchDevices();

src/converse-register.js

@@ -108,7 +108,7 @@ converse.plugins.add('converse-register', {
 
             showLoginOrRegisterForm () {
                 const { _converse } = this.__super__;
-                if (_.isNil(this.registerpanel)) {
+                if (!this.registerpanel) {
                     return;
                 }
                 if (this.model.get('active-form') == "register") {
@@ -308,7 +308,7 @@ converse.plugins.add('converse-register', {
                  * other methods.
                  */
                 if (ev && ev.preventDefault) { ev.preventDefault(); }
-                if (_.isNull(ev.target.querySelector('input[name=domain]'))) {
+                if (ev.target.querySelector('input[name=domain]') === null) {
                     this.submitRegistrationForm(ev.target);
                 } else {
                     this.onProviderChosen(ev.target);
@@ -367,7 +367,7 @@ converse.plugins.add('converse-register', {
 
             giveFeedback (message, klass) {
                 let feedback = this.el.querySelector('.reg-feedback');
-                if (!_.isNull(feedback)) {
+                if (feedback !== null) {
                     feedback.parentNode.removeChild(feedback);
                 }
                 const form = this.el.querySelector('form');
@@ -513,10 +513,10 @@ converse.plugins.add('converse-register', {
             showValidationError (message) {
                 const form = this.el.querySelector('form');
                 let flash = form.querySelector('.form-errors');
-                if (_.isNull(flash)) {
+                if (flash === null) {
                     flash = '<div class="form-errors hidden"></div>';
                     const instructions = form.querySelector('p.instructions');
-                    if (_.isNull(instructions)) {
+                    if (instructions === null) {
                         form.insertAdjacentHTML('afterbegin', flash);
                     } else {
                         instructions.insertAdjacentHTML('afterend', flash);

src/converse-roomslist.js

@@ -66,26 +66,24 @@ converse.plugins.add('converse-roomslist', {
                 _converse.chatboxes.on('change:num_unread', this.onChatBoxChanged, this);
                 _converse.chatboxes.on('change:num_unread_general', this.onChatBoxChanged, this);
                 _converse.chatboxes.on('remove', this.onChatBoxRemoved, this);
-                this.reset(_.map(_converse.chatboxes.where({'type': 'chatroom'}), 'attributes'));
+                this.reset(_.map(_converse.chatboxes.where({'type': _converse.CHATROOMS_TYPE}), 'attributes'));
             },
 
             onChatBoxAdded (item) {
-                if (item.get('type') === 'chatroom') {
+                if (item.get('type') === _converse.CHATROOMS_TYPE) {
                     this.create(item.attributes);
                 }
             },
 
             onChatBoxChanged (item) {
-                if (item.get('type') === 'chatroom') {
+                if (item.get('type') === _converse.CHATROOMS_TYPE) {
                     const room =  this.get(item.get('jid'));
-                    if (!_.isNil(room)) {
-                        room.set(item.attributes);
-                    }
+                    room && room.set(item.attributes);
                 }
             },
 
             onChatBoxRemoved (item) {
-                if (item.get('type') === 'chatroom') {
+                if (item.get('type') === _converse.CHATROOMS_TYPE) {
                     const room = this.get(item.get('jid'))
                     this.remove(room);
                 }
@@ -201,7 +199,7 @@ converse.plugins.add('converse-roomslist', {
                 const controlboxview = _converse.chatboxviews.get('controlbox');
                 if (controlboxview !== undefined && !u.rootContains(_converse.root, this.el)) {
                     const el = controlboxview.el.querySelector('.open-rooms-list');
-                    if (!_.isNull(el)) {
+                    if (el !== null) {
                         el.parentNode.replaceChild(this.el, el);
                     }
                 }

src/converse-rosterview.js

@@ -648,13 +648,17 @@ converse.plugins.add('converse-rosterview', {
                 return matches;
             },
 
-            filter (q, type) {
-                /* Filter the group's contacts based on the query "q".
+            /**
+             * Filter the group's contacts based on the query "q".
              *
              * If all contacts are filtered out (i.e. hidden), then the
              * group must be filtered out as well.
+             * @private
+             * @param { string } q - The query to filter against
+             * @param { string } type
              */
-                if (_.isNil(q)) {
+            filter (q, type) {
+                if (q === null || q === undefined) {
                     type = type || _converse.rosterview.filter_view.model.get('filter_type');
                     if (type === 'state') {
                         q = _converse.rosterview.filter_view.model.get('chat_state');

src/headless/converse-bookmarks.js

@@ -231,10 +231,9 @@ converse.plugins.add('converse-bookmarks', {
                 window.sessionStorage.setItem(this.fetched_flag, true);
                 _converse.log('Error while fetching bookmarks', Strophe.LogLevel.ERROR);
                 _converse.log(iq.outerHTML, Strophe.LogLevel.DEBUG);
-                if (!_.isNil(deferred)) {
+                if (deferred) {
                     if (iq.querySelector('error[type="cancel"] item-not-found')) {
-                        // Not an exception, the user simply doesn't have
-                        // any bookmarks.
+                        // Not an exception, the user simply doesn't have any bookmarks.
                         return deferred.resolve();
                     } else {
                         return deferred.reject(new Error("Could not fetch bookmarks"));

src/headless/converse-chatboxes.js

@@ -154,7 +154,7 @@ converse.plugins.add('converse-chatboxes', {
                  *
                  * https://xmpp.org/extensions/xep-0363.html#request
                  */
-                if (_.isNil(this.file)) {
+                if (!this.file) {
                     return Promise.reject(new Error("file is undefined"));
                 }
                 const iq = converse.env.$iq({
@@ -853,7 +853,7 @@ converse.plugins.add('converse-chatboxes', {
             },
 
             isArchived (original_stanza) {
-                return !_.isNil(sizzle(`result[xmlns="${Strophe.NS.MAM}"]`, original_stanza).pop());
+                return !!sizzle(`result[xmlns="${Strophe.NS.MAM}"]`, original_stanza).pop();
             },
 
             getErrorMessage (stanza) {
@@ -902,8 +902,8 @@ converse.plugins.add('converse-chatboxes', {
                 const attrs = Object.assign({
                     'chat_state': chat_state,
                     'is_archived': this.isArchived(original_stanza),
-                    'is_delayed': !_.isNil(delay),
-                    'is_spoiler': !_.isNil(spoiler),
+                    'is_delayed': !!delay,
+                    'is_spoiler': !!spoiler,
                     'is_single_emoji': text ? u.isSingleEmoji(text) : false,
                     'message': text,
                     'msgid': msgid,
@@ -965,8 +965,9 @@ converse.plugins.add('converse-chatboxes', {
                 /* Given a newly received message, update the unread counter if
                  * necessary.
                  */
-                if (!message) { return; }
-                if (_.isNil(message.get('message'))) { return; }
+                if (!message || !message.get('message')) {
+                    return;
+                }
                 if (utils.isNewMessage(message) && this.isHidden()) {
                     this.save({'num_unread': this.get('num_unread') + 1});
                     _converse.incrementMsgCounter();
@@ -998,7 +999,7 @@ converse.plugins.add('converse-chatboxes', {
 
                 _converse.connection.addHandler(stanza => {
                     // Message receipts are usually without the `type` attribute. See #1353
-                    if (!_.isNull(stanza.getAttribute('type'))) {
+                    if (stanza.getAttribute('type') !== null) {
                         // TODO: currently Strophe has no way to register a handler
                         // for stanzas without a `type` attribute.
                         // We could update it to accept null to mean no attribute,
@@ -1096,7 +1097,7 @@ converse.plugins.add('converse-chatboxes', {
                 const forwarded = stanza.querySelector('forwarded');
                 const original_stanza = stanza;
 
-                if (!_.isNull(forwarded)) {
+                if (forwarded !== null) {
                     const xmlns = Strophe.NS.CARBONS;
                     is_carbon = sizzle(`received[xmlns="${xmlns}"]`, original_stanza).length > 0;
                     if (is_carbon && original_stanza.getAttribute('from') !== _converse.bare_jid) {
@@ -1112,7 +1113,7 @@ converse.plugins.add('converse-chatboxes', {
                 const from_bare_jid = Strophe.getBareJidFromJid(from_jid);
                 const is_me = from_bare_jid === _converse.bare_jid;
 
-                if (is_me &&_.isNull(to_jid)) {
+                if (is_me && to_jid === null) {
                     return _converse.log(
                         `Don't know how to handle message stanza without 'to' attribute. ${stanza.outerHTML}`,
                         Strophe.LogLevel.ERROR
@@ -1268,7 +1269,7 @@ converse.plugins.add('converse-chatboxes', {
                             attrs.fullname = _.get(contact, 'attributes.fullname');
                         }
                         const chatbox = _converse.chatboxes.getChatBox(jids, attrs, true);
-                        if (_.isNil(chatbox)) {
+                        if (!chatbox) {
                             _converse.log("Could not open chatbox for JID: "+jids, Strophe.LogLevel.ERROR);
                             return;
                         }

src/headless/converse-core.js

@@ -477,9 +477,7 @@ function connect (credentials) {
             BOSH_WAIT
         );
     } else if (_converse.authentication === _converse.LOGIN) {
-        const password = _.isNil(credentials)
-            ? _converse.connection.pass || _converse.password
-            : credentials.password;
+        const password = credentials ? credentials.password : (_converse.connection.pass || _converse.password);
         if (!password) {
             if (_converse.auto_login) {
                 throw new Error("autoLogin: If you use auto_login and "+
@@ -834,7 +832,7 @@ _converse.initialize = async function (settings, callback) {
 
     // Module-level variables
     // ----------------------
-    this.callback = callback || _.noop;
+    this.callback = callback || function noop () {};
     /* When reloading the page:
      * For new sessions, we need to send out a presence stanza to notify
      * the server/network that we're online.
@@ -1085,7 +1083,7 @@ _converse.initialize = async function (settings, callback) {
         this.msg_counter += 1;
         const unreadMsgCount = this.msg_counter;
         let title = document.title;
-        if (_.isNil(title)) {
+        if (!title) {
             return;
         }
         if (title.search(/^Messages \(\d+\) /) === -1) {
@@ -1098,7 +1096,7 @@ _converse.initialize = async function (settings, callback) {
     this.clearMsgCounter = function () {
         this.msg_counter = 0;
         let title = document.title;
-        if (_.isNil(title)) {
+        if (!title) {
             return;
         }
         if (title.search(/^Messages \(\d+\) /) !== -1) {

src/headless/converse-disco.js

@@ -407,7 +407,7 @@ converse.plugins.add('converse-disco', {
                      */
                     async getFeature (name, xmlns) {
                         await _converse.api.waitUntil('streamFeaturesAdded');
-                        if (_.isNil(name) || _.isNil(xmlns)) {
+                        if (!name || !xmlns) {
                             throw new Error("name and xmlns need to be provided when calling disco.stream.getFeature");
                         }
                         if (_converse.stream_features === undefined && !_converse.api.connection.connected()) {
@@ -567,7 +567,7 @@ converse.plugins.add('converse-disco', {
                      */
                     async get (jid, create=false) {
                         await _converse.api.waitUntil('discoInitialized');
-                        if (_.isNil(jid)) {
+                        if (!jid) {
                             return _converse.disco_entities;
                         }
                         if (_converse.disco_entities === undefined && !_converse.api.connection.connected()) {
@@ -626,7 +626,7 @@ converse.plugins.add('converse-disco', {
                      * _converse.api.disco.features.get(Strophe.NS.MAM, _converse.bare_jid);
                      */
                     async get (feature, jid) {
-                        if (_.isNil(jid)) {
+                        if (!jid) {
                             throw new TypeError('You need to provide an entity JID');
                         }
                         await _converse.api.waitUntil('discoInitialized');
@@ -682,7 +682,7 @@ converse.plugins.add('converse-disco', {
                  * await _converse.api.disco.refreshFeatures('room@conference.example.org');
                  */
                 async refreshFeatures (jid) {
-                    if (_.isNil(jid)) {
+                    if (!jid) {
                         throw new TypeError('api.disco.refreshFeatures: You need to provide an entity JID');
                     }
                     await _converse.api.waitUntil('discoInitialized');
@@ -712,7 +712,7 @@ converse.plugins.add('converse-disco', {
                  * const features = await _converse.api.disco.getFeatures('room@conference.example.org');
                  */
                 async getFeatures (jid) {
-                    if (_.isNil(jid)) {
+                    if (!jid) {
                         throw new TypeError('api.disco.getFeatures: You need to provide an entity JID');
                     }
                     await _converse.api.waitUntil('discoInitialized');
@@ -733,7 +733,7 @@ converse.plugins.add('converse-disco', {
                  * const fields = await _converse.api.disco.getFields('room@conference.example.org');
                  */
                 async getFields (jid) {
-                    if (_.isNil(jid)) {
+                    if (!jid) {
                         throw new TypeError('api.disco.getFields: You need to provide an entity JID');
                     }
                     await _converse.api.waitUntil('discoInitialized');
@@ -765,10 +765,10 @@ converse.plugins.add('converse-disco', {
                  * @example
                  * _converse.api.disco.getIdentity('pubsub', 'pep', _converse.bare_jid).then(
                  *     function (identity) {
-                 *         if (_.isNil(identity)) {
-                 *             // The entity DOES NOT have this identity
-                 *         } else {
+                 *         if (identity) {
                  *             // The entity DOES have this identity
+                 *         } else {
+                 *             // The entity DOES NOT have this identity
                  *         }
                  *     }
                  * ).catch(_.partial(_converse.log, _, Strophe.LogLevel.FATAL));

src/headless/converse-muc.js

@@ -1027,8 +1027,8 @@ converse.plugins.add('converse-muc', {
              */
             saveAffiliationAndRole (pres) {
                 const item = sizzle(`x[xmlns="${Strophe.NS.MUC_USER}"] item`, pres).pop();
-                const is_self = !_.isNull(pres.querySelector("status[code='110']"));
-                if (is_self && !_.isNil(item)) {
+                const is_self = (pres.querySelector("status[code='110']") !== null);
+                if (is_self && item) {
                     const affiliation = item.getAttribute('affiliation');
                     const role = item.getAttribute('role');
                     const changes = {};
@@ -1848,7 +1848,7 @@ converse.plugins.add('converse-muc', {
             incrementUnreadMsgCounter (message) {
                 if (!message) { return; }
                 const body = message.get('message');
-                if (_.isNil(body)) { return; }
+                if (!body) { return; }
                 if (u.isNewMessage(message) && this.isHidden()) {
                     const settings = {'num_unread_general': this.get('num_unread_general') + 1};
                     if (this.isUserMentioned(message)) {

src/headless/converse-ping.js

@@ -37,9 +37,7 @@ converse.plugins.add('converse-ping', {
             //
             // var feature = _converse.disco_entities[_converse.domain].features.findWhere({'var': Strophe.NS.PING});
             _converse.lastStanzaDate = new Date();
-            if (_.isNil(jid)) {
-                jid = Strophe.getDomainFromJid(_converse.bare_jid);
-            }
+            jid = jid || Strophe.getDomainFromJid(_converse.bare_jid);
             if (timeout === undefined ) { timeout = null; }
             if (success === undefined ) { success = null; }
             if (error === undefined ) { error = null; }

src/headless/converse-roster.js

@@ -191,7 +191,7 @@ converse.plugins.add('converse-roster', {
                           'name': name,
                           'priority': _.isNaN(parseInt(priority, 10)) ? 0 : parseInt(priority, 10),
                           'show': _.propertyOf(presence.querySelector('show'))('textContent') || 'online',
-                          'timestamp': _.isNil(delay) ? (new Date()).toISOString() : dayjs(delay.getAttribute('stamp')).toISOString()
+                          'timestamp': delay ? dayjs(delay.getAttribute('stamp')).toISOString() : (new Date()).toISOString()
                        };
                 if (resource) {
                     resource.save(settings);

src/headless/converse-vcard.js

@@ -65,7 +65,7 @@ converse.plugins.add('converse-vcard', {
         async function onVCardData (jid, iq) {
             const vcard = iq.querySelector('vCard');
             let result = {};
-            if (!_.isNull(vcard)) {
+            if (vcard !== null) {
                 result = {
                     'stanza': iq,
                     'fullname': _.get(vcard.querySelector('FN'), 'textContent'),

src/headless/i18n.js

@@ -110,7 +110,7 @@ export default {
     },
 
     translate (str) {
-        if (_.isNil(jed_instance)) {
+        if (!jed_instance) {
             return Jed.sprintf.apply(Jed, arguments);
         }
         const t = jed_instance.translate(str);

src/headless/utils/core.js

@@ -21,10 +21,10 @@ const Strophe = strophe.default.Strophe;
 const u = {};
 
 u.logger = Object.assign({
-    'debug': _.get(console, 'log') ? console.log.bind(console) : _.noop,
-    'error': _.get(console, 'log') ? console.log.bind(console) : _.noop,
-    'info': _.get(console, 'log') ? console.log.bind(console) : _.noop,
-    'warn': _.get(console, 'log') ? console.log.bind(console) : _.noop
+    'debug': _.get(console, 'log') ? console.log.bind(console) : function noop () {},
+    'error': _.get(console, 'log') ? console.log.bind(console) : function noop () {},
+    'info': _.get(console, 'log') ? console.log.bind(console) : function noop () {},
+    'warn': _.get(console, 'log') ? console.log.bind(console) : function noop () {}
 }, console);
 
 u.isTagEqual = function (stanza, name) {
@@ -144,9 +144,7 @@ u.isHeadlineMessage = function (_converse, message) {
     if (chatbox && chatbox.get('type') === _converse.CHATROOMS_TYPE) {
         return false;
     }
-    if (message.getAttribute('type') !== 'error' &&
-            !_.isNil(from_jid) &&
-            !_.includes(from_jid, '@')) {
+    if (message.getAttribute('type') !== 'error' && from_jid && !_.includes(from_jid, '@')) {
         // Some servers (I'm looking at you Prosody) don't set the message
         // type to "headline" when sending server messages. For now we
         // check if an @ signal is included, and if not, we assume it's

src/utils/html.js

@@ -34,10 +34,10 @@ function getAutoCompleteProperty (name, options) {
 }
 
 const logger = _.assign({
-    'debug': _.get(console, 'log') ? console.log.bind(console) : _.noop,
-    'error': _.get(console, 'log') ? console.log.bind(console) : _.noop,
-    'info': _.get(console, 'log') ? console.log.bind(console) : _.noop,
-    'warn': _.get(console, 'log') ? console.log.bind(console) : _.noop
+    'debug': _.get(console, 'log') ? console.log.bind(console) : function noop () {},
+    'error': _.get(console, 'log') ? console.log.bind(console) : function noop () {},
+    'info': _.get(console, 'log') ? console.log.bind(console) : function noop () {},
+    'warn': _.get(console, 'log') ? console.log.bind(console) : function noop () {}
 }, console);
 
 const XFORM_TYPE_MAP = {
@@ -227,15 +227,15 @@ u.calculateElementHeight = function (el) {
 
 u.getNextElement = function (el, selector='*') {
     let next_el = el.nextElementSibling;
-    while (!_.isNull(next_el) && !sizzle.matchesSelector(next_el, selector)) {
+    while ((next_el instanceof Element) && !sizzle.matchesSelector(next_el, selector)) {
         next_el = next_el.nextElementSibling;
     }
     return next_el;
 }
 
 u.getPreviousElement = function (el, selector='*') {
-    let prev_el = el.previousSibling;
-    while (!_.isNull(prev_el) && !sizzle.matchesSelector(prev_el, selector)) {
+    let prev_el = el.previousElementSibling;
+    while ((prev_el instanceof Element) && !sizzle.matchesSelector(prev_el, selector)) {
         prev_el = prev_el.previousSibling
     }
     return prev_el;
@@ -243,7 +243,7 @@ u.getPreviousElement = function (el, selector='*') {
 
 u.getFirstChildElement = function (el, selector='*') {
     let first_el = el.firstElementChild;
-    while (!_.isNull(first_el) && !sizzle.matchesSelector(first_el, selector)) {
+    while ((first_el instanceof Element) && !sizzle.matchesSelector(first_el, selector)) {
         first_el = first_el.nextSibling
     }
     return first_el;
@@ -251,33 +251,29 @@ u.getFirstChildElement = function (el, selector='*') {
 
 u.getLastChildElement = function (el, selector='*') {
     let last_el = el.lastElementChild;
-    while (!_.isNull(last_el) && !sizzle.matchesSelector(last_el, selector)) {
+    while ((last_el instanceof Element) && !sizzle.matchesSelector(last_el, selector)) {
         last_el = last_el.previousSibling
     }
     return last_el;
 }
 
 u.hasClass = function (className, el) {
-    return el.classList.contains(className);
+    return (el instanceof Element) && el.classList.contains(className);
 };
 
 u.addClass = function (className, el) {
-    if (el instanceof Element) {
-        el.classList.add(className);
-    }
+    (el instanceof Element) && el.classList.add(className);
+    return el;
 }
 
 u.removeClass = function (className, el) {
-    if (el instanceof Element) {
-        el.classList.remove(className);
-    }
+    (el instanceof Element) && el.classList.remove(className);
     return el;
 }
 
 u.removeElement = function (el) {
-    if (!_.isNil(el) && !_.isNil(el.parentNode)) {
-        el.parentNode.removeChild(el);
-    }
+    (el instanceof Element) && el.parentNode && el.parentNode.removeChild(el);
+    return el;
 }
 
 u.showElement = _.flow(
@@ -286,15 +282,13 @@ u.showElement = _.flow(
 )
 
 u.hideElement = function (el) {
-    if (!_.isNil(el)) {
-        el.classList.add('hidden');
-    }
+    (el instanceof Element) && el.classList.add('hidden');
     return el;
 }
 
 u.ancestor = function (el, selector) {
     let parent = el;
-    while (!_.isNil(parent) && !sizzle.matchesSelector(parent, selector)) {
+    while ((parent instanceof Element) && !sizzle.matchesSelector(parent, selector)) {
         parent = parent.parentElement;
     }
     return parent;
@@ -304,7 +298,7 @@ u.nextUntil = function (el, selector, include_self=false) {
     /* Return the element's siblings until one matches the selector. */
     const matches = [];
     let sibling_el = el.nextElementSibling;
-    while (!_.isNil(sibling_el) && !sibling_el.matches(selector)) {
+    while ((sibling_el instanceof Element) && !sibling_el.matches(selector)) {
         matches.push(sibling_el);
         sibling_el = sibling_el.nextElementSibling;
     }
@@ -398,8 +392,8 @@ u.slideToggleElement = function (el, duration) {
  */
 u.slideOut = function (el, duration=200) {
     return new Promise((resolve, reject) => {
-        if (_.isNil(el)) {
-            const err = "Undefined or null element passed into slideOut"
+        if (!el) {
+            const err = "An element needs to be passed in to slideOut"
             logger.warn(err);
             reject(new Error(err));
             return;
@@ -457,8 +451,8 @@ u.slideOut = function (el, duration=200) {
 u.slideIn = function (el, duration=200) {
     /* Hides/collapses an element by sliding it into itself. */
     return new Promise((resolve, reject) => {
-        if (_.isNil(el)) {
-            const err = "Undefined or null element passed into slideIn";
+        if (!el) {
+            const err = "An element needs to be passed in to slideIn";
             logger.warn(err);
             return reject(new Error(err));
         } else if (_.includes(el.classList, 'collapsed')) {
@@ -518,8 +512,8 @@ u.isVisible = function (el) {
 
 
 u.fadeIn = function (el, callback) {
-    if (_.isNil(el)) {
-        logger.warn("Undefined or null element passed into fadeIn");
+    if (!el) {
+        logger.warn("An element needs to be passed in to fadeIn");
     }
     if (window.converse_disable_effects) {
         el.classList.remove('hidden');
@@ -561,7 +555,7 @@ u.xForm2webForm = function (field, stanza, options) {
                     'value': value,
                     'label': option.getAttribute('label'),
                     'selected': _.includes(values, value),
-                    'required': !_.isNil(field.querySelector('required'))
+                    'required': !!field.querySelector('required')
                 })
             }
         );
@@ -571,7 +565,7 @@ u.xForm2webForm = function (field, stanza, options) {
             'label': field.getAttribute('label'),
             'options': options.join(''),
             'multiple': (field.getAttribute('type') === 'list-multi'),
-            'required': !_.isNil(field.querySelector('required'))
+            'required': !!field.querySelector('required')
         });
     } else if (field.getAttribute('type') === 'fixed') {
         const text = _.get(field.querySelector('value'), 'textContent');
@@ -581,7 +575,7 @@ u.xForm2webForm = function (field, stanza, options) {
             'name': field.getAttribute('var'),
             'label': field.getAttribute('label') || '',
             'value': _.get(field.querySelector('value'), 'textContent'),
-            'required': !_.isNil(field.querySelector('required'))
+            'required': !!field.querySelector('required')
         });
     } else if (field.getAttribute('type') === 'boolean') {
         return tpl_form_checkbox({
@@ -589,7 +583,7 @@ u.xForm2webForm = function (field, stanza, options) {
             'name': field.getAttribute('var'),
             'label': field.getAttribute('label') || '',
             'checked': _.get(field.querySelector('value'), 'textContent') === "1" && 'checked="1"' || '',
-            'required': !_.isNil(field.querySelector('required'))
+            'required': !!field.querySelector('required')
         });
     } else if (field.getAttribute('var') === 'url') {
         return tpl_form_url({
@@ -603,7 +597,7 @@ u.xForm2webForm = function (field, stanza, options) {
             'type': XFORM_TYPE_MAP[field.getAttribute('type')],
             'label': field.getAttribute('label') || '',
             'value': _.get(field.querySelector('value'), 'textContent'),
-            'required': !_.isNil(field.querySelector('required'))
+            'required': !!field.querySelector('required')
         });
     } else if (field.getAttribute('var') === 'ocr') { // Captcha
         const uri = field.querySelector('uri');
@@ -613,7 +607,7 @@ u.xForm2webForm = function (field, stanza, options) {
             'name': field.getAttribute('var'),
             'data': _.get(el, 'textContent'),
             'type': uri.getAttribute('type'),
-            'required': !_.isNil(field.querySelector('required'))
+            'required': !!field.querySelector('required')
         });
     } else {
         const name = field.getAttribute('var');
@@ -624,7 +618,7 @@ u.xForm2webForm = function (field, stanza, options) {
             'fixed_username': options.fixed_username,
             'autocomplete': getAutoCompleteProperty(name, options),
             'placeholder': null,
-            'required': !_.isNil(field.querySelector('required')),
+            'required': !!field.querySelector('required'),
             'type': XFORM_TYPE_MAP[field.getAttribute('type')],
             'value': _.get(field.querySelector('value'), 'textContent')
         });