MediaQueryListEvent: matches 属性

matchesMediaQueryListEvent 接口的只读属性,是一个布尔值,如果 document 当前匹配媒体查询列表,则为 true,否则为 false

布尔值;如果 document 当前匹配媒体查询列表,则返回 true,否则返回 false

示例

js
const para = document.querySelector("p"); // This is the UI element where to display the text
const mql = window.matchMedia("(max-width: 600px)");

mql.addEventListener("change", (event) => {
  if (event.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 600 pixels wide
    para.textContent = "This is a wide screen — more than 600px wide.";
    document.body.style.backgroundColor = "blue";
  }
});

规范

规范
CSSOM 视图模块
# dom-mediaquerylistevent-matches

浏览器兼容性

BCD 表格仅在浏览器中加载

另请参阅