Element.toggleAttribute()

Element 接口的 toggleAttribute() 方法切换给定元素的某个布尔值属性的状态(如果属性不存在则添加属性,属性存在则移除属性)。

语法

Element.toggleAttribute(name [, force]);

参数

name
A DOMString specifying the name of the attribute to be toggled. The attribute name is automatically converted to all lower-case when toggleAttribute() is called on an HTML element in an HTML document.
force 可选
A boolean value to determine whether the attribute should be added or removed, no matter whether the attribute is present or not at the moment.

返回值

true if attribute name is eventually present, and false otherwise.

异常

InvalidCharacterError
The specified attribute name contains one or more characters which are not valid in attribute names.

例子

在下面的例子中,toggleAttribute() 被用于切换 <input>readonly 属性。

HTML

<input value="text">
<button>toggleAttribute("readonly")</button>

JavaScript

var button = document.querySelector("button");
var input = document.querySelector("input");

button.addEventListener("click", function(){
  input.toggleAttribute("readonly");
});

结果

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 -

Polyfill

译者注:下面代码中的 void 0undefined

if (!Element.prototype.toggleAttribute) {
  Element.prototype.toggleAttribute = function(name, force) {
    if(force !== void 0) force = !!force

    if (this.getAttribute(name) !== null) {
      if (force) return true;

      this.removeAttribute(name);
      return false;
    } else {
      if (force === false) return false;

      this.setAttribute(name, "");
      return true;
    }
  };
}

规范

规范 状态 备注
DOM
Element.toggleAttribute
Living Standard

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