如何确定 JavaScript 中 HTML 元素的类型? [英] How can I determine the type of an HTML element in JavaScript?

问题描述

我需要一种方法来确定 JavaScript 中 HTML 元素的类型.它有 ID，但元素本身可以是

、

字段、

等.我怎样才能做到这一点?

解决方案

nodeName 是您要查找的属性.例如:

var elt = document.getElementById('foo');控制台日志(elt.nodeName)；

注意 nodeName 返回大写且不带尖括号的元素名称，这意味着如果你想检查一个元素是否是

元素，你可以这样做:

elt.nodeName == "DIV"

虽然这不会给您预期的结果:

elt.nodeName == "
"

I need a way to determine the type of an HTML element in JavaScript. It has the ID, but the element itself could be a <div>, a <form> field, a <fieldset>, etc. How can I achieve this?

解决方案

nodeName is the attribute you are looking for. For example:

var elt = document.getElementById('foo');
console.log(elt.nodeName);

Note that nodeName returns the element name capitalized and without the angle brackets, which means that if you want to check if an element is an <div> element you could do it as follows:

elt.nodeName == "DIV"

While this would not give you the expected results:

elt.nodeName == "<div>"

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