第九章正则表达式 - 8.1 创建对象 - 《JavaScript 基础》

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    <script>
        //1.方式1：使用字面量方式创建对象
        var reg = /xinlang/;
        var str = 'fsafafasfxinlangfafafa';
        //检验字符是否匹配正则表达式,用test()
        var boo = reg.test(str);
        console.log(boo);
        //2.方式2：使用构造函数方式创建对象
        var reg2=new RegExp('zhangsan');
        var str='dasfasgfasfzhangsanfafa';
        var boo2=reg2.test(str);
        console.log(boo2);
        //3.正则表达式参数g-全局匹配，i-忽略大小写，m-多行匹配
        var reg3 = /zhanGsan/gi;
        // var reg3 = new RegExp('zhangsan','g');
        var str3 = '11111111zhangsan2132314141zhangsan';
        var newStr3 = str3.replace(reg3, '张三');
        console.log(newStr3);
    </script>
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