Javascript replace letter + number regex

Question

I have a string containing an URL, containing /p[num], for example www.test.com/list/p12 (p is the page number used for pagination).

This is my attempt to get the URL without the page number in javascript:

url = url.replace("\\/p\\d+", '');

However, it doesn't replace anything. What am I doing wrong here?

JSFIDDLE: https://jsfiddle.net/t9p95p87/

You seem to be using regex syntax in a string literal that is passed directly to .replace(). Instead use regex literal. url = url.replace(/\/p\d+/, '') Your way would work if you passed that string to the RegExp constructor. url = url.replace(new RegExp("\\/p\\d+"), ''); — user1106925
– user1106925, Commented Jan 8, 2017 at 23:27
If that URL is coming from window.location or an a.href, and if the part to remove will always be at the start, you could handle it without a regex by modifying the .pathname property and assigning it back to the same property. — user1106925
– user1106925, Commented Jan 8, 2017 at 23:30

Pointy · Accepted Answer · 2017-01-08 23:27:31Z

3

If you use regexp literal syntax your code works fine:

url = url.replace(/\/p\d+/, '');

I think what was happening in your code is that the double backslash before the /p was ending up being interpreted as a desire to match a literal backslash.

answered Jan 8, 2017 at 23:27

Pointy

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