為什么step2()里面的console.log($("#div1").width());顯示的不是500而是100回調函數不是等step1()執行完后再執行step2()嗎？那應該500呀html無標題文檔*{margin:0;padding:0;}#div1{width:100px;height:100px;line-height:100px;text-align:center;border:1px#000solid;}div1functionstep1(callback){$("#div1").animate({width:"500px"},1000);callback();}functionstep2(){$("#div1").animate({height:"500px"},1000);console.log($("#div1").width());}$(function(){$("input").on("click",function(){step1(step2);});})