Convert merge_conflict_service.js to axios

app/assets/javascripts/merge_conflicts/merge_conflict_service.js

 /* eslint-disable no-param-reassign, comma-dangle */
+import axios from '../lib/utils/axios_utils';
 
 ((global) => {
   global.mergeConflicts = global.mergeConflicts || {};
@@ -10,20 +11,11 @@
     }
 
     fetchConflictsData() {
-      return $.ajax({
-        dataType: 'json',
-        url: this.conflictsPath
-      });
+      return axios.get(this.conflictsPath);
     }
 
     submitResolveConflicts(data) {
-      return $.ajax({
-        url: this.resolveConflictsPath,
-        data: JSON.stringify(data),
-        contentType: 'application/json',
-        dataType: 'json',
-        method: 'POST'
-      });
+      return axios.post(this.resolveConflictsPath, data);
     }
   }
 

app/assets/javascripts/merge_conflicts/merge_conflicts_bundle.js

@@ -38,24 +38,22 @@ $(() => {
       showDiffViewTypeSwitcher() { return mergeConflictsStore.fileTextTypePresent(); }
     },
     created() {
-      mergeConflictsService
-        .fetchConflictsData()
-        .done((data) => {
+      mergeConflictsService.fetchConflictsData()
+        .then(({ data }) => {
           if (data.type === 'error') {
             mergeConflictsStore.setFailedRequest(data.message);
           } else {
             mergeConflictsStore.setConflictsData(data);
           }
-        })
-        .error(() => {
-          mergeConflictsStore.setFailedRequest();
-        })
-        .always(() => {
+
           mergeConflictsStore.setLoadingState(false);
 
           this.$nextTick(() => {
             syntaxHighlight($('.js-syntax-highlight'));
           });
+        })
+        .catch(() => {
+          mergeConflictsStore.setFailedRequest();
         });
     },
     methods: {
@@ -82,10 +80,10 @@ $(() => {
 
         mergeConflictsService
           .submitResolveConflicts(mergeConflictsStore.getCommitData())
-          .done((data) => {
+          .then(({ data }) => {
             window.location.href = data.redirect_to;
           })
-          .error(() => {
+          .catch(() => {
             mergeConflictsStore.setSubmitState(false);
             new Flash('Failed to save merge conflicts resolutions. Please try again!');
           });