MediaQueryList.removeListener()

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句法
范例
规范
浏览器兼容性
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removeListener() 方法在 MediaQueryList interface removes a listener from the MediaQueryListener .

This is basically an alias for EventTarget.removeEventListener() , for backwards compatibility purposes — in older browsers you could use removeEventListener() 代替。

句法

MediaQueryList.removeListener(func)

参数

func: A function or function reference representing the callback function you want to remove. In the original implementation, the callback was a non-standard MediaQueryListListener object. In the new implementation the standard event mechanism is used, and the callback is a standard function.

返回值

Void.

范例

var mql = window.matchMedia('(max-width: 600px)');
function screenTest(e) {
  if (e.matches) {
    /* the viewport is 600 pixels wide or less */
    para.textContent = 'This is a narrow screen — less than 600px wide.';
    document.body.style.backgroundColor = 'red';
  } else {
    /* the viewport is more than than 600 pixels wide */
    para.textContent = 'This is a wide screen — more than 600px wide.';
    document.body.style.backgroundColor = 'blue';
  }
}
mql.addListener(screenTest);
// Later on, when it is no longer needed
mql.removeListener(screenTest);

规范

规范	状态	注释
CSSOM (CSS 对象模型) 视图模块 The definition of 'removeListener' in that specification.	工作草案	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
`removeListener`	Chrome 9	Edge 12	Firefox 6	IE 10	Opera 12.1	Safari 5.1	WebView Android Yes	Chrome Android 18	Firefox Android Yes	Opera Android Yes	Safari iOS 5	Samsung Internet Android 1.0

图例

完整支持

另请参阅

元数据

最后修改： Jul 25, 2020

CSS Object Model
MediaQueryList
特性
方法
1. addListener()
2. removeListener()
Related pages for CSSOM

在此页

句法

参数

返回值

范例

规范

浏览器兼容性

图例

另请参阅

相关话题