MediaQueryList: change event

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

当媒体查询的支持状况改变时,MediaQueryList 接口的 change 事件触发。

语法

在像 addEventListener() 这样的方法中使用该事件的名字,或者设置一个事件处理函数属性。

js
addEventListener("change", (event) => {});

onchange = (event) => {};

事件类型

事件属性

MediaQueryListEvent 接口的属性继承自它的父接口,Event.

MediaQueryListEvent.matches 只读

一个布尔值,如果 document 当前匹配媒体查询列表,该值为 true,反之为 false

MediaQueryListEvent.media 只读

一个字符串,代表着一个序列化后的媒体查询。

示例

js
var mql = window.matchMedia("(max-width: 600px)");

mql.onchange = (e) => {
  if (e.matches) {
    /* 视口等于或小于 600 像素 */
    console.log("This is a narrow screen — less than 600px wide.");
  } else {
    /* 视口大于 600 像素 */
    console.log("This is a wide screen — more than 600px wide.");
  }
};

规范

Specification
CSSOM View Module
# dom-mediaquerylist-onchange

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
change event

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参见