Standardize filtered_search file.

app/assets/javascripts/service_desk_issues/filtered_search.js

 /* eslint-disable class-methods-use-this */
 
+const AUTHOR_PARAM_KEY = 'author_username';
+
 export default class FilteredSearchServiceDesk extends gl.FilteredSearchManager {
-  constructor() {
+  constructor(supportBotData) {
     super('service_desk');
 
-    this.supportBotAttrs = JSON.parse(
-      document.querySelector('.service-desk-issues').dataset.supportBot,
-    );
+    this.supportBotData = supportBotData;
   }
 
   customRemovalValidator(token) {
     const tokenValue = token.querySelector('.value-container');
 
     return tokenValue ?
-      tokenValue.getAttribute('data-original-value') !== `@${this.supportBotAttrs.username}` : true;
+      tokenValue.getAttribute('data-original-value') !== `@${this.supportBotData.username}` : true;
   }
 
   canEdit(tokenName) {
@@ -21,9 +21,8 @@ export default class FilteredSearchServiceDesk extends gl.FilteredSearchManager
   }
 
   modifyUrlParams(paramsArray) {
-    const authorParamKey = 'author_username';
-    const supportBotParamPair = `${authorParamKey}=${this.supportBotAttrs.username}`;
-    const onlyValidParams = paramsArray.filter(param => param.indexOf(authorParamKey) === -1);
+    const supportBotParamPair = `${AUTHOR_PARAM_KEY}=${this.supportBotData.username}`;
+    const onlyValidParams = paramsArray.filter(param => param.indexOf(AUTHOR_PARAM_KEY) === -1);
 
     // unshift ensures author param is always first token element
     onlyValidParams.unshift(supportBotParamPair);

app/assets/javascripts/service_desk_issues/index.js

 import FilteredSearchServiceDesk from './filtered_search';
 
 document.addEventListener('DOMContentLoaded', () => {
-  this.filteredSearchManager = new FilteredSearchServiceDesk();
+  const supportBotData = JSON.parse(
+    document.querySelector('.js-service-desk-issues').dataset.supportBot,
+  );
+
+  this.filteredSearchManager = new FilteredSearchServiceDesk(supportBotData);
 
   this.filteredSearchManager.setup();
 });

ee/app/views/projects/issues/service_desk.html.haml

@@ -16,7 +16,7 @@
 
 - support_bot_attrs = User.support_bot.to_json(only: [:id, :name, :username, :avatar_url])
 
-%div{ class: "#{container_class} service-desk-issues", data: { support_bot: support_bot_attrs } }
+%div{ class: "#{container_class} js-service-desk-issues service-desk-issues", data: { support_bot: support_bot_attrs } }
   .top-area
     = render 'shared/issuable/nav', type: :issues
     .nav-controls{ class: ("visible-xs" if show_new_nav?) }