how to extract url id from string with regex?

Question

suppose that, i've this string:

google.com/:id/:category

how can i extract only id and category from this string?

i should use regex

this match doesn't work:

match(/\/:([a-zA-Z0-9]*)/g);

because response is: (2) ['/:id', '/:category'] but i need ['id', category] — Martin Rützy
– Martin Rützy, Commented Mar 7, 2022 at 12:20

Tim Biegeleisen · Accepted Answer · 2022-03-07 12:22:13Z

8

You may try the following:

var url = "google.com/:id/:category";
var parts = url.match(/(?<=\/:)[a-zA-Z0-9]+/g);
console.log(parts);

This approach uses the positive lookbehind (?<=\/:) to get around the problem of matching the unwanted leading /: portion. Instead, this leading marker is asserted but not matched in the version above.

answered Mar 7, 2022 at 12:22

Tim Biegeleisen

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Comments

Mue · Accepted Answer · 2022-03-07 12:40:44Z

2

Well, capture groups are ignored in match with /g. You might go with matchAll like this:

const url = "google.com/:id/:category"
const info = [...url.matchAll(/\/:([a-zA-Z0-9]*)/g)].map(match => match[1])
console.log(info)

Credit: Better access to capturing groups (than String.prototype.match())

edited Mar 7, 2022 at 12:40

answered Mar 7, 2022 at 12:23

Mue

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