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每天一个JavaScript实例-去除字符串末尾的空白

<!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=http://www.mamicode.com/"#" onClick="white()">clickMe>

检测低版本浏览器,向下兼容:

if(typeof String.trim == "undefined")
  String.prototype.trim = function(){
  return this.replace(/(^\s*)|(\s*$)/g,"");
  }
}


每天一个JavaScript实例-去除字符串末尾的空白