javascript Javascript按名称获取子元素
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Javascript Get Child Element by Name
提问by Fluidbyte
I'm passing a var el
into a function. el
contains previously grabbed element (using getElementById) and when I console.log el
in the function I get the following:
我正在将一个 var 传递给el
一个函数。el
包含以前抓取的元素(使用 getElementById),当我el
在函数中使用 console.log时,我得到以下信息:
The problem comes in when I try to grab an element inside of the el
using:
当我尝试在el
using 中抓取一个元素时,问题就出现了:
el.getElementsByName('fname');
I get the error:
我收到错误:
Uncaught TypeError: Object #<HTMLDivElement> has no method 'getElementsByName'
回答by Pointy
The getElementsByName()
API is at the document
object level. It's not an HTMLElement method.
该getElementsByName()
API是在document
对象层级。它不是 HTMLElement 方法。
You could use querySelectorAll()
instead:
你可以querySelectorAll()
改用:
var fnames = el.querySelectorAll('[name=fname]');
It's not supported in older browsers however.
但是,旧浏览器不支持它。