看效果

直接获取

    var Height = $(window).height();
    var Width = $(window).width();
    console.log("初始大小" + Height + "," + Width);

JQuery获取

先引入jquery文件，这里直接忽略掉了

    // Jquery方法
    $(window).resize(function() {
        var Height = $(window).height();
        var Width = $(window).width();
        console.log("Jquery实时获取的" + Height + "," + Width);
    })

JS获取

    // js方法
    window.addEventListener('resize', getWindowInfo);

    function getWindowInfo() {
        var Height = document.body.offsetHeight;
        var Width = document.body.offsetWidth;
        console.log("JS实时获取的" + Height + "," + Width);
    }