Replace string URL subdomain in pure JS or Angular

Question

I have a URL as a string want to replace only the subdomian i.e. changing https://example1.com/home to https://example2.com/home. What is the most effective way to do this in Angular or pure JS?

Possible duplicate of How to replace host part of a URL using javascript regex — Guillaume Georges
– Guillaume Georges, Commented Jun 6, 2018 at 14:06

Asons · Accepted Answer · 2018-06-06 14:23:53Z

1

The simplest would likely be to split it twice, assuming you don't know what the sub domain will be, and then replace the sub domain using replace().

With split('//')[1] you get all but the protocol, and split('.')[0] will give you the sub domain.

var url = "https://example1.com/home"
var new_sub = "example2";

console.log( url.replace( url.split('//')[1].split('.')[0], new_sub ) )

With a regex you can do this

var url = "https://example1.com/home"
var new_sub = "example2";

console.log( url.replace( url.split(/[\/\.]+/)[1], new_sub ) )

edited Jun 6, 2018 at 14:23

answered Jun 6, 2018 at 14:08

Asons

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