当元素在屏幕上可见时运行动画 [英] Run animation when element is visible on screen

问题描述

我有一些进度条脚本.它工作正常，但在页面加载时运行.我想在屏幕上看到条形时运行动画(如果进度条位于选项卡中，它也应该起作用).我怎么能得到这个?

I've a little progress bars script. It works fine but runs on page load. I want to run animation when bars are visible on screen (it should work too if progress bars would be in tabs). How may I get this?

这里的脚本:

setTimeout(function(){

    $('.skill-bar .skill-bar-content').each(function() {
        var me = $(this);
        var perc = me.attr("data-percentage");

        var current_perc = 0;

        var progress = setInterval(function() {
            if (current_perc>=perc) {
                clearInterval(progress);
            } else {
                current_perc +=1;
                me.css('width', (current_perc)+'%');
            }

            me.text((current_perc)+'%');

        }, 10);

    });

},10);

jsFiddle: http://jsfiddle.net/fUyYL/

jsFiddle: http://jsfiddle.net/fUyYL/

推荐答案

是这样的吗? http://jsfiddle.net/fUyYL/1/

var ele = $('#skill-bars');
if( ele.is(':visible') ) {
    ...
}

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