Uncaught TypeError:无法读取null的属性'getElementsByTagName' [英] Uncaught TypeError: Cannot read property 'getElementsByTagName' of null
本文介绍了Uncaught TypeError:无法读取null的属性'getElementsByTagName'的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试解决方案,但是 .getElementsByTagName()
which used,产生了一个错误:
I'm trying this solution but .getElementsByTagName()
which is used, produced an error:
var tags = document.body.getElementsByTagName("*");
Uncaught TypeError: Cannot read property 'getElementsByTagName' of null
为什么会产生这个错误如何修复它?
Why is it producing this error and how can I fix it?
推荐答案
document.body
won'
将< script>
从< head>
元素添加到< body>
元素中(因为您试图获取所有元素它必须位于body元素的 end ),或者将其放入一个函数中,并从创建正文后触发的事件调用它(例如 window
load
event)。
Move the <script>
from the <head>
element to the <body>
element (since you are trying to get all the elements in it, you'd want to be at the end of the body element) or put it in a function and call it from an event that fires after the body has been created (such as the window
load
event).
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