5.png

    1. <body>  
    2.     <script>
    3.         // 监听窗口改变尺寸事件
    4.         window.onresize = function() {
    5.             var root = document.documentElement;
    6.             console.log('窗口改变尺寸了',root.clientWidth,root.clientHeight);
    7.         }
    8.     </script>
    9. </body>

    1.mp4