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How to implement guide with jquery .on() event delegation scenarios on dynamically added elements in a nested structure

👀 Views: 44 💬 Answers: 1 📅 Created: 2025-06-08
jquery event-delegation dynamic-content JavaScript

I'm converting an old project and I'm collaborating on a project where Hey everyone, I'm running into an issue that's driving me crazy..... I’m experiencing a question with event delegation in jQuery where the `.on()` method does not seem to register click events on dynamically added elements nested within multiple levels of existing markup. I have a structure where I dynamically append list items within a list, and each list item contains a button that should trigger a specific function when clicked. Here's a simplified version of my HTML structure: ```html <ul id="myList"> <li class="parent-item"> Parent Item 1 <ul class="child-list"> <li class="child-item"><button class="btn-action">Action</button></li> </ul> </li> </ul> ``` I am using jQuery 3.6.0 and trying to delegate the click event from the `#myList` to the buttons inside the `child-item` class like this: ```javascript $(document).ready(function() { $('#myList').on('click', '.btn-action', function() { alert('Button clicked!'); }); }); ``` When I initially load the page, the alert works perfectly when the buttons are clicked. However, after I append new `li` items to the `.child-list` like this: ```javascript var newListItem = '<li class="child-item"><button class="btn-action">New Action</button></li>'; $('.child-list').append(newListItem); ``` The newly added buttons do not trigger the alert anymore. I’ve checked to ensure that the HTML is being generated correctly, and the buttons are present in the DOM after appending. However, the event delegation seems to unexpected result. I’ve tried using `.off().on()` to re-attach the event handler after appending, but that also does not resolve the scenario. Is there something I am overlooking in the event delegation mechanism, or do I need to handle dynamically added elements differently in this context? My development environment is macOS. Is there a better approach? This is for a service running on Windows 11. Has anyone dealt with something similar? This issue appeared after updating to Javascript latest.