报错 Cannot read properties of undefined(reading‘addEventListener‘)如何解决

简介: 报错 Cannot read properties of undefined(reading‘addEventListener‘)如何解决
我在制作项目中遇到了一个问题,给大家分享一下,如下图:




问题:这是我给一个input输入框绑定的监听事件出现的报错


翻译:无法读取未定义的属性(读取' addEventListener ')


错误原因:js中操作的dom元素的函数方法需要再html文档中渲染完之后再去执行,没有渲染完时dom树是不完整的,所以根本就找不


到监听的元素。(也就是在页面还没加载完的时候这串监听的代码已经执行了)


解决方法


  1. 将addEvementListener放在绑定的元素添加渲染后再执行


  1. 用window.onload或者$(document).ready()


尝试着去解决把!

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