Основы
Регулярные выражения всегда начинаются с//.
/ expression /, i.e /[A-Z]+/g basic format / name\?\*\\/ escape special characters with backslashes () group with parentheses | logical OR Character classes \w word \d digit \s whitespace (tabs, line breaks) \W NOT word \D NOT digit \S NOT whitespace \t tabs, \n line breaks . any character
Якоря
^world start of the strings world$ end of the string
Скобки
[xyz] match any x, y, z [^xyz] NOT x, y, z [B-X] match any capital letters between B & X.
Количественная оценка
viki|maria match viki or maria
z{n} n occurrences
z* zero or multiple occurrences
z+ one or multiple occurrences
z{min, max} min/max occurrences
z? zero or one occurrences
Оригинал: “https://dev.to/vikirobles/regular-expressions-cheatsheet-n47”