regexp_example2 在线代码实例

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运行代码

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var str = "abc123def";
        var str2 = "abc123_def";
        var patt = /[a-zA-Z0-9_]+/;
        document.write(str.match(patt));
        
        document.write("<br>")
        document.write(str2.match(patt));
    </script>
</body>
</html>
 
 
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运行结果
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