部署教程

/*进度条加载显示*/
#percentageCounter{position:fixed; left:0; top:0; height:3px; z-index:99999; background-image: linear-gradient(to right, #339933,#FF6666);border-radius:5px;}

//进度条加载显示
$(window).scroll(function() {
    var a = $(window).scrollTop(),
    c = $(document).height(),
    b = $(window).height();
    scrollPercent = a / (c - b) * 100;
    scrollPercent = scrollPercent.toFixed(1);
    $("#percentageCounter").css({
        width: scrollPercent + "%"
    });
}).trigger("scroll");

<div id="percentageCounter"></div>