js css模仿打字效果

1.效果

2.源码

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><style type="text/css">#myDiv{display: inline-block;width:500px;height:300px;background-color:rgba(0,0,0,0.3);color:hsla(0,100%,70%,1);word-wrap:break-word;line-height:30px;letter-spacing:3px;padding-left:3px;text-indent:40px;border-radius:5px;-webkit-box-shadow: 3px 3px 3px 3px rgba(0,0,0,0.1);-moz-box-shadow: 3px 3px 3px 3px rgba(0,0,0,0.1);box-shadow: 3px 3px 3px 3px rgba(0,0,0,0.1);}</style><script type="text/javascript">window.onload = function () {var myDiv = document.getElementById("myDiv");var contentArr = "秋天来临了天空像一块覆盖大地的蓝宝石。村外那个小池塘睁着碧澄澄的眼睛，凝望着这美好的天色。一对小白鹅侧着脑袋欣赏自己映在水里的影子。山谷里枫树的叶子，不知是否喝了过量的酒，红的像一团火似的。村前村后的稻子，低着头弯着腰，在秋风中默默地等待着人们去收割，半空中，排着“人”字形的雁群，高兴的唱着歌，告别人们，向天边慢慢飞去……".split("");var content = "";var index = 0;var ID = setInterval(function () {content  = contentArr[index];myDiv.innerHTML = content   "_";index  ;if(index === contentArr.length){myDiv.innerHTML = content ;clearInterval(ID);console.log("结束了");}},100);}</script>
</head>
<body>
<div id="myDiv"></div>
</body>
</html>