lovecoding
/
VIP32


			
				
					
						
						
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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
      var reg = /\ban\b/gi;
      var str1 = "an Cat,is An animal";
      console.log(str1.match(reg));
    // 2.匹配字母首行 ^
    var reg = /^ab/
    console.log(reg.test("aabab"));

    // 3.匹配字母尾行 $
    var reg1 = /ab$/;
    console.log(reg1.test("abbab"));

    var reg2 = /^a$/;
    console.log(reg2.test("aaa"));
    console.log(reg2.test("a"));
    console.log(reg2.test(" "));

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