字符

定位符

转义

分组、引用

(ABC) - capturing group
(?:ABC) - non-capturing group
\1 - numeric reference

Lookaround

(?=ABC) - positive lookahead
(?!ABC) - negative lookahead
(?<=ABC) - positive lookbehind
(?<!ABC) - negative lookbehind

限定符

+ - 1 or more
* - 0 or more
? - optional
{1,3}

? - lazy

替换

$& - match
$1 - capture group

Flags

i - case insensitive
g - global search
m - multiline

参考资料

regexr

Tip

匹配中文

1
[\u4e00-\u9fa5]

包含指定单词且排除google

1
(?!.*google).*(detail|feed|track).*