Element.hasAttribute()

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句法
范例
Polyfill
注意事项
规范
浏览器兼容性
相关话题

Element.hasAttribute() 方法返回布尔 value indicating whether the specified element has the specified attribute or not.

句法

var result = element.hasAttribute(name);

result: holds the return value true or false .
名称

范例

var foo = document.getElementById("foo");
if (foo.hasAttribute("bar")) {
    // do something
}

Polyfill

;(function(prototype) {
    prototype.hasAttribute = prototype.hasAttribute || function(name) {
        return !!(this.attributes[name] &&
                  this.attributes[name].specified);
    }
})(Element.prototype);

注意事项

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods	Namespace-aware variants (DOM Level 2)	DOM Level 1 methods for dealing with `Attr` nodes directly (seldom used)	DOM Level 2 namespace-aware methods for dealing with `Attr` nodes directly (seldom used)
`setAttribute` (DOM 1)	`setAttributeNS`	`setAttributeNode`	`setAttributeNodeNS`
`getAttribute` (DOM 1)	`getAttributeNS`	`getAttributeNode`	`getAttributeNodeNS`
`hasAttribute` (DOM 2)	`hasAttributeNS`	-	-
`removeAttribute` (DOM 1)	`removeAttributeNS`	`removeAttributeNode`	-

规范

规范	状态	注释
DOM The definition of 'Element.hasAttribute()' in that specification.	实时标准	从 DOM (文档对象模型) 3 级核心规范 , moved from `节点` to `元素`
DOM (文档对象模型) 3 级核心规范 The definition of 'Element.hasAttribute()' in that specification.	过时	无变化自 DOM (文档对象模型) 级别 2 核心规范
DOM (文档对象模型) 级别 2 核心规范 The definition of 'Element.hasAttribute()' in that specification.	过时	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`hasAttribute`	Chrome 1	Edge 12	Firefox 1	IE 8	Opera 8	Safari 6	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 6	Samsung Internet Android 1.0

图例

完整支持

元数据

最后修改： 2019 年 3 月 23 日

在此页

句法

范例

Polyfill

注意事项

规范

浏览器兼容性

图例

相关话题