JavaScript DOM object learning event stream addEventListener() usage tutorial

addEventListener is used to register event processing program, which is attachEvent in IE. Why do we talk about addEventListener instead of attachEvent? Firstly, attachEvent is relatively simple, and secondly, addEventListener is the standard content in DOM.

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##Introduction

addEventListener registers an event handler for the document node, document, window or XMLHttpRequest. In the past, we usually used

Syntax

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执行顺序为method3->method2->method1 

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