Merge pull request #2031 from lumosmind/patch-49

iliakan · web-flow · commit cdf382de4cf3 · 2020-07-30T01:13:27.000+03:00
refactoring
diff --git a/1-js/09-classes/07-mixins/article.md b/1-js/09-classes/07-mixins/article.md
@@ -154,7 +154,7 @@ let eventMixin = {
    *  this.trigger('select', data1, data2);
    */
   trigger(eventName, ...args) {
-    if (!this._eventHandlers || !this._eventHandlers[eventName]) {
+    if (!this._eventHandlers?.[eventName]) {
       return; // no handlers for that event name
     }
 

Original file line number	Diff line number	Diff line change
`@@ -154,7 +154,7 @@ let eventMixin = {`
`154`	`154`	`* this.trigger('select', data1, data2);`
`155`	`155`	`*/`
`156`	`156`	`trigger(eventName, ...args) {`
`157`		`- if (!this._eventHandlers \|\| !this._eventHandlers[eventName]) {`
	`157`	`+ if (!this._eventHandlers?.[eventName]) {`
`158`	`158`	`return; // no handlers for that event name`
`159`	`159`	`}`
`160`	`160`