regex101: JavaScript Match Workspace

Non-Capturing Group(?:https?:\/\/)?

?repeats the group contents below at most once:

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:www\.)?

?repeats the group contents below at most once:

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

yoututhe literal text youtu (case sensitive)

Non-Capturing Group(?:\.be\/|be.com\/\S*(?:watch|embed)(?:(?:(?=\/[-a-zA-Z0-9_]{11,}(?!\S))\/)|(?:\S*v=|v\/)))

1st Alternative\.be\/

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

bethe literal text be (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativebe.com\/\S*(?:watch|embed)(?:(?:(?=\/[-a-zA-Z0-9_]{11,}(?!\S))\/)|(?:\S*v=|v\/))

bethe literal text be (case sensitive)

.any character (except for line terminators)

comthe literal text com (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\S*any non-whitespace character, repeated any number of times

Non-Capturing Group(?:watch|embed)

1st Alternativewatch

watchthe literal text watch (case sensitive)

2nd Alternativeembed

embedthe literal text embed (case sensitive)

Non-Capturing Group(?:(?:(?=\/[-a-zA-Z0-9_]{11,}(?!\S))\/)|(?:\S*v=|v\/))

1st Alternative(?:(?=\/[-a-zA-Z0-9_]{11,}(?!\S))\/)

Non-Capturing Group(?:(?=\/[-a-zA-Z0-9_]{11,}(?!\S))\/)

Positive Lookahead(?=\/[-a-zA-Z0-9_]{11,}(?!\S))

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[-a-zA-Z0-9_]{11,}

{11,}matches at least 11 characters from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Negative Lookahead(?!\S)

\Sany non-whitespace character

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative(?:\S*v=|v\/)

Non-Capturing Group(?:\S*v=|v\/)

1st Alternative\S*v=

\S*any non-whitespace character, repeated any number of times

v=the literal text v= (case sensitive)

2nd Alternativev\/

vthe literal v (118₁₀ / 166₈ / 76₁₆) (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([-a-zA-Z0-9_]{11,})

Character Class[-a-zA-Z0-9_]{11,}

{11,}matches at least 11 characters from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

(?:https?:\/\/)?(?:www\.)?youtu(?:\.be\/|be.com\/\S*(?:watch|embed)(?:(?:(?=\/[-a-zA-Z0-9_]{11,}(?!\S))\/)|(?:\S*v=|v\/)))([-a-zA-Z0-9_]{11,})

Unit Tests

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