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，但元素本身可以是一个div，一个表单域，一个fieldset等等。我如何实现这个？

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?

推荐答案

nodeName 是您要查找的属性。例如：

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

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

请注意， nodeName 返回大写的元素名称而没有尖括号，这意味着如果你想检查一个元素是否是一个< div> 元素，你可以这样做：

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"

虽然这不会给您预期的结果：

While this would not give you the expected results:

elt.nodeName == "<div>"

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