lovecoding
/
web0715


			
				
					
						
						
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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.[] 匹配任意字符
      // const reg1 = /[\d]/i;
      // // const reg1 = /[abc]/i;
      // console.log(reg1.test("abc"));
      // console.log(reg1.test("aabbccabccbaa"));
      // console.log(reg1.test("banana"));
      // console.log(reg1.test("tomorrow"));
      // console.log(reg1.test("Apple"));
      // console.log(reg1.test("banana1"));

      // 2.- 连字符
      //   const reg2 = /[^a-z]/;
      //   console.log(reg2.test("apple"));
      //   console.log(reg2.test("APPLE"));
      //   console.log(reg2.test("12121"));

      // 3.^ 取反
        const reg3 = /\S/;
        console.log(reg3.test("^\v"));
        console.log(reg3.test("^\n"));
      //   const text = "Hello\s\s\sWorld\s2021";
      //   console.log(text);
      //   console.log(text.replace(/s/g, "&nbsp;"));

      //4. . 匹配除换行外的任意字符
    //   const reg4 = /./;
    //   console.log(reg4.test("a"));
    //   console.log(reg4.test("A"));
    //   console.log(reg4.test("0"));
    //   console.log(reg4.test(" "));
    //   console.log(reg4.test("\t"));
    //   console.log(reg4.test("\n"));
    </script>
  </body>
</html>