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js常用的正则表达操作

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
              var past=/helloword/gi;
              var str='helloword my HelloWord baby';
              console.log(past.test(str));//返回true or false

              console.log(past.exec(/aa/));//返回匹配到的字符串及其位置 匹配不到返回null
              console.log(past.exec(str));//返回匹配到的字符串及其位置 匹配不到返回null
              console.log(str.match(past));//返回匹配到的字符串        匹配不到返回null
              console.log(str.match(/aa/));//返回匹配到的字符串        匹配不到返回null
              console.log(str.search(/1/));//返回匹配到的字符串位置     匹配不到返回-1
              console.log(str.replace(past,"你好"));//字符串替换
              console.log(str.split(' '));//字符串拆分成数组
              console.log(str.split(/s+/));//s+匹配空字符串
    </script>
</head>
<body>

</body>
</html>

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原文地址：https://www.cnblogs.com/wujindong/p/6265575.html