一个JavaScript去除字符串末尾的空白实例代码

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<!DOCTYPE html>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

<title>每天一个JavaScript实例-去除字符串末尾的空白</title>

<script>

function white(){

var input = document.getElementById("inputid");

var lines = input.value.split("\n");

var resultString = "";

for (var i = 0; i < lines.length; i++){

var string = lines[i].trim();

resultString += string + "-";

}

alert(resultString);

}

</script>

</head>

<body>

<textarea id="inputid" placeholder="请输入多行字符串"></textarea>

<a href="#" onClick="white()">clickMe</a>

</body>

</html>

检测低版本浏览器,向下兼容:

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if(typeof String.trim == "undefined")

String.prototype.trim = function(){

return this.replace(/(^\s*)|(\s*$)/g,"");

}

}

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