regex101: split URL into location-resource-params

Explanation

Pro

Group location(?'location'.+)

.+any character (except for line terminators), repeated at least once

Non-Capturing Group(?:\/(?'resource'[\w\-\._]+\.js))

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group resource(?'resource'[\w\-\._]+\.js)

Character Class[\w\-\._]+

+matches at least one character from the set below:

\wany word character

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

jsthe literal text js (case sensitive)

Non-Capturing Group(?:\?(?'params'.+))?

?repeats the group contents below at most once:

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Group params(?'params'.+)

.+any character (except for line terminators), repeated at least once

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

Quick Reference

25 tokens

Regular Expression

(?'location'.+)(?:\/(?'resource'[\w\-\._]+\.js))(?:\?(?'params'.+))?

New

leaflet-0.7.2.js
/leaflet-0.7.2.js
http://leafletjs.com/dist/leaflet.js
https://api.tiles.mapbox.com/mapbox.js/v1.6.3/mapbox.js
http://example.com/path/to/leaflet-0.7.2.js
http://example.com/path/to/mapbox-v1.6.2.js
http://leafletjs.com/dist/leaflet.js?v=123456&hide=true#section

Substitution

leaflet-0.7.2.js
/leaflet-0.7.2.js
http://leafletjs.com/dist/leaflet.js
https://api.tiles.mapbox.com/mapbox.js/v1.6.3/mapbox.js
http://example.com/path/to/leaflet-0.7.2.js
http://example.com/path/to/mapbox-v1.6.2.js
http://leafletjs.com/dist/leaflet.js?v=123456&hide=true#section