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This article mainly explains "the case analysis of javascript event delegation". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "javascript event delegation case analysis" bar!

Description

1. Event delegation means that the event of the target node is moved to the parent node for processing. Because of the bubbling nature of the browser, when the event is triggered by the target node, the parent node will also trigger it. So the parent node is responsible for listening and handling the event.

2. To use an event delegate, you only need to listen to the event on the parent node of the list item, and then handle it uniformly.

Example

Function handleClick (target) {/ / Click the processing event of the list item} function delegate (e) {/ / determine whether the target object is the list item if (e.target.nodeName = 'LI') {handleClick (e.target);}} const parent = document.getElementById (' parent'); parent.addEventListener ('click', delegate) At this point, I believe you have a deeper understanding of "javascript event delegation case analysis". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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