JavaScript dom操作事件委托的相关内容

文章 2023-12-28 来自：开发者社区

JavaScript DOM 操作：什么是事件委托（Event Delegation）？有什么优势？

事件委托（Event Delegation）是一种利用事件冒泡机制的技术，通过将事件处理程序绑定到一个父元素，以处理其子元素上的事件。简而言之，事件被委托给父元素来管理。在事件冒泡中，当子元素上的事件触发时，这个事件会一直向上冒泡到父元素，直至达到文档根元素。事件委托利用这个冒泡机制...

文章 2023-12-16 来自：开发者社区

JavaScript DOM操作：如何实现事件委托？

事件委托是一种在处理事件时，将事件处理程序绑定到一个共同的祖先元素上，而不是在每个子元素上都绑定独立的事件处理程序。这样可以减少事件处理程序的数量，提高性能，并使代码更容易维护。实现事件委托的基本思想是利用事件冒泡机制，将事件处理交给祖先元素，然后通过事件对象的 target 属性判断事件发生在哪个子元素上。 ...

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更新时间 2024-01-12 10:42:15

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