javascript (pattern) (?:pattern)

1.(pattern)

var _verification = /^<([^<>]*)>$/;
var _str = "<ABC>";
var _getStr = _str.replace(_verification, "$1");
console.info(_getStr );//ABC_verification.test(_str);//trueconsole.info(RegExp.$1);//ABC

$1为第一个括号里面的匹配， $2为第二个括号匹配，以此类推...

2.(?:pattern)

var _verification = /^<(?:[^<>]*)>$/;
var _str = "<ABC>";
_verification.test(_str);//true
console.info(RegExp.$1);//""

加上?:之后只做匹配不进行存储，例如不会存储成$1,$2

时间： 2024-10-10 12:08:04

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