Regex 转义

转义特殊 regex 字符以字面匹配它们。也处理替换字符串的转义。

Text to Escape0 chars

Escaped for Regex Pattern

Escaped output...

Escaped for Replacement String

Escaped for replacement...

For replacement strings, only $ needs escaping (as $$)

Special Regex Characters

.Any character

*0 or more

+1 or more

?0 or 1

^Start of string

$End of string

{Quantifier start

}Quantifier end

(Group start

)Group end

[Class start

]Class end

|Alternation

\Escape character

Regex Special Characters - 技术详情

Special regex characters like . * + ? ^ $ { } ( ) | [ ] \\ have special meanings. To match them literally, prefix with a backslash. For replacement strings, $ needs to be escaped as $$.

命令行替代方案

// JavaScript regex escape function
function escapeRegex(str) {
  return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

参考

查看官方规范