regex101: NPM Module ID

^start of line

Group n(?<n>(?:@(?<org>[a-z0-9-~][a-z0-9-._~]*)\/)?(?<pkg>[a-z0-9-~][a-z0-9-._~]*))

Non-Capturing Group(?:@(?<org>[a-z0-9-~][a-z0-9-._~]*)\/)?

?repeats the group contents below at most once:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group org(?<org>[a-z0-9-~][a-z0-9-._~]*)

Character Class[a-z0-9-~]

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Character Class[a-z0-9-._~]*

*matches any number of characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group pkg(?<pkg>[a-z0-9-~][a-z0-9-._~]*)

Character Class[a-z0-9-~]

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Character Class[a-z0-9-._~]*

*matches any number of characters from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Non-Capturing Group(?:@(?<v>[-a-z0-9><=_.^~*| ]+))?

?repeats the group contents below at most once:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group v(?<v>[-a-z0-9><=_.^~*| ]+)

Character Class[-a-z0-9><=_.^~*| ]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group p(?<p>\/[^\r\n]*)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^\r\n]*

*matches any number of characters outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

$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

Search reference

Regular Expression

^(?<n>(?:@(?<org>[a-z0-9-~][a-z0-9-._~]*)\/)?(?<pkg>[a-z0-9-~][a-z0-9-._~]*))(?:@(?<v>[-a-z0-9><=_.^~*| ]+))?(?<p>\/[^\r\n]*)?$

Test String
New

react-icons@4.4.0/
@heroicons/react@latest/package.json
react
react/hello
react@1
react/
reaction@1.1.1/index.js
react@*
react@>1.2|| <= 1.*

Regular Expression

Test StringNew

Test String
New