<div class="weui-progress__bar">
<div class="weui-progress__inner-bar js_progress" data-value="40" style="width: 40%;"></div>
</div><!-- 进度条 动画 -->
<script type="text/javascript">
var $progress = $('.js_progress');
var progress = 0;
$progress.each(function(){
progress = $(this).attr('data-value')
$(this).css({width: progress + '%'})
})
</script>