regex101: JavaScript Match Workspace

Pro

^start of line

Group 1([a-zА-Яа-яА-ЯёЁ0-9]+(-[a-zА-Яа-яА-ЯёЁ0-9]+)*\.)+

+repeats the group contents below at least once:

Character Class[a-zА-Яа-яА-ЯёЁ0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

а-яone character from а (1072₁₀) to я (1103₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

ёthe literal ё (1105₁₀ / 2121₈ / 451₁₆) (case sensitive)

Ёthe literal Ё (1025₁₀ / 2001₈ / 401₁₆) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 2(-[a-zА-Яа-яА-ЯёЁ0-9]+)*

*repeats the group contents below any number of times:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[a-zА-Яа-яА-ЯёЁ0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

а-яone character from а (1072₁₀) to я (1103₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

ёthe literal ё (1105₁₀ / 2121₈ / 451₁₆) (case sensitive)

Ёthe literal Ё (1025₁₀ / 2001₈ / 401₁₆) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-zА-Яа-яА-ЯёЁ]{2,63}

{2,63}matches between 2 and 63 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

а-яone character from а (1072₁₀) to я (1103₁₀) (case sensitive)

А-Яone character from А (1040₁₀) to Я (1071₁₀) (case sensitive)

ёthe literal ё (1105₁₀ / 2121₈ / 451₁₆) (case sensitive)

Ёthe literal Ё (1025₁₀ / 2001₈ / 401₁₆) (case sensitive)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

26 tokens

Regular Expression

^([a-zА-Яа-яА-ЯёЁ0-9]+(-[a-zА-Яа-яА-ЯёЁ0-9]+)*\.)+[a-zА-Яа-яА-ЯёЁ]{2,63}$

There are no unit tests, click to add some.