基于jQuery实现的打字机效果
话不多说，请看实例代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta name="keyword" content="">
<meta name="description" content="">
</head>
<body>
<div class="autotype" id="autotype">
<p>一场雨把我困在这里</p>
<br/>
<p>你温柔的表情</p>
<p>会让我伤心</p>
<br/>
<p>六月的雨，只是无情的你~</p>
</div>
<script src="http://file2.ci123.com/ast/js/jquery_172.js"></script>
<script>
$.fn.autotype = function(){
var $text = $(this);
console.log('this',this);
var str = $text.html();//返回被选 元素的内容
var index = 0;
var x = $text.html('');
//$text.html()和$(this).html('')有区别
var timer = setInterval(function(){
//substr(index, 1) 方法在字符串中抽取从index下标开始的一个的字符
var current = str.substr(index, 1);
if(current == '<'){
//indexOf() 方法返回">"在字符串中首次出现的位置。
index = str.indexOf('>', index) + 1;
}else{
index ++ ;
}
//console.log(["0到index下标下的字符",str.substring(0, index)],["符号",index & 1 ? '_': '']);
//substring() 方法用于提取字符串中介于两个指定下标之间的字符
$text.html(str.substring(0, index) + (index & 1 ? '_': ''));
if(index >= str.length){
clearInterval(timer);
}
},100);
};
$("#autotype").autotype();
</script>
</body>
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