Regular Expressions 101

^start of line

Non-Capturing Group(?:(?<scope>@[\d*a-z~-][\w*.~-]*)\/)?

?repeats the group contents below at most once:

Group scope(?<scope>@[\d*a-z~-][\w*.~-]*)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[\d*a-z~-]

\da digit

*the literal * (42₁₀ / 52₈ / 2A₁₆)

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

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[\w*.~-]*

*matches any number of characters from the set below:

\wany word character

*the literal * (42₁₀ / 52₈ / 2A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[\da-z~-]

\da digit

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

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[\w.~-]*

*matches any number of characters from the set below:

\wany word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^(?:(?<scope>@[\d*a-z~-][\w*.~-]*)\/)?[\da-z~-][\w.~-]*$

New

mlly
@flex-development/mlly
@npm/thingy
crazy!
.start-with-period
@npm-zors/money!time.js
@FLEX-DEVELOPMENT/MLLY