设置了position：absolute后怎么搞也没法撑开父元素，只好用js了:...-慕课网

设置了position：absolute后怎么搞也没法撑开父元素，只好用js了: var g = function (id) {return document.getElementById(id);} g("sidebar").offsetHeight < g("content").offsetHeight ? g("sidebar").style.height = g("content").offsetHeight + "px" : "";