lovecoding
/
Web1020


			
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 1.单词边界 \b
        const reg1 = /n\b/gi;
        const str1 = 'This is a banana,an Orange';
        console.log(str1.match(reg1));
        // 2.匹配字母首行 ^
        const reg2 = /^ab/;
        const str2 = 'abaaabbb';
        console.log(reg2.test(str2));
        // 3.匹配字母尾行 $
        const reg3 = /ab$/;
        const str3 = 'babbab';
        console.log(reg3.test(str3));


        const reg4 = /^ab$/;
        console.log(reg4.test("aaa"))

        console.log(reg4.test("a"))

        console.log(reg4.test(" "))
        console.log(reg4.test("ab"))
        console.log(reg4.test("abab"))

    </script>
</body>
</html>