极客教程JavaScript RegExp – \uxxxx
描述
\uxxxx匹配由十六进制数字xxxx指定的Unicode字符；例如，\u0009与\t相同。
示例
以下示例显示了RegExp表达式的用法。
<html>
<head>
<title>JavaScript RegExp</title>
</head>
<body>
<script type = "text/javascript">
var str = "ab\u0009c";
var pattern = /\u0009/g;
var index = str.search(pattern);
document.write("Test 1 - returned value : " + index);
str = "abc";
index = str.search(pattern);
document.write("<br/>Test 2 - returned value : " + index);
</script>
</body>
</html>
输出
Test 1 - returned value : 2
Test 2 - returned value : -1