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  • zepto下动画返回顶部

     function scroll(scrollTo, time) {
                    var scrollFrom = parseInt(document.body.scrollTop),
                            i = 0,
                            runEvery = 5; // run every 5ms

                    scrollTo = parseInt(scrollTo);
                    time /= runEvery;

                    var interval = setInterval(function () {
                            i++;

                            document.body.scrollTop = (scrollTo - scrollFrom) / time * i + scrollFrom;

                            if (i >= time) {
                                    clearInterval(interval);
                            }
                    }, runEvery);
            } 
     var scrolltop=$(".content_discuss1").offset().top-window.innerHeight;
    scroll(scrolltop,800); 
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  • 原文地址:https://www.cnblogs.com/ch-zaizai/p/6264780.html
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