[wp-trac] [WordPress Trac] #31218: nav-menu.js menu item added event

[WordPress Trac]

#31218: nav-menu.js menu item added event
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 Reporter:  welcher                 |       Owner:  adamsilverstein
     Type:  enhancement             |      Status:  closed
 Priority:  normal                  |   Milestone:  4.8
Component:  Menus                   |     Version:  4.2
 Severity:  trivial                 |  Resolution:  fixed
 Keywords:  has-patch next-release  |     Focuses:  javascript
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Comment (by harishaas):

 You can manually trigger a custom JavaScript event after you've added your
 menu item. You would need to modify your plugin to dispatch this event
 after adding the item, and then you can listen for this event in your
 custom JavaScript code. Here's an example:

 javascript


 {{{
 // Inside your plugin code after adding the menu item
 var event = new Event('menu-item-added');
 document.dispatchEvent(event);

 }}}
 In your custom JavaScript code, you can listen for this event:

 javascript
 {{{
 document.addEventListener('menu-item-added', function (event) {
     // Handle the event here
 });
 }}}

 Mutation Observer: You can use a MutationObserver to watch for changes in
 the DOM and react when a new menu item is added. This approach is more
 generic and doesn't rely on custom events. Here's a basic example:

 javascript
 {{{
 var menuList = document.querySelector('.menu');

 var observer = new MutationObserver(function (mutationsList) {
     for (var mutation of mutationsList) {
         if (mutation.type === 'childList') {
             // A child node (menu item) was added
             // Handle the added menu item here
         }
     }
 });
 }}}
 observer.observe(menuList, { childList: true });
 This code will trigger whenever a new menu item is added to the menu list,
 allowing you to react to the addition.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31218#comment:38>
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