Getting domain without subdomain from an url with javascript

Asked Feb 12 '20 at 16:29

Active Feb 12 '20 at 16:37

Viewed 132 times

Is there a way to get a domain without any subdomain from an url with javascript? I tried some approaches, but all of them deliver domain with subdomain.

All regular expressions i was seeing were able just to filter www out - other subdomains were on their place.

Maybe somebody knows a javascript hint, like this one in Java.

Possible input: https://us.www.example.com/folder-1/index.html

Desired output: example.com

To go more in detail: i'm working on a Chrome extension and want to pass a domain from background.js to popup.js. I get current url, and then the domain from the current url with:

chrome.tabs.onUpdated.addListener(function(tabid, changeInfo, tab){
    chrome.tabs.query({'active' : true, 'currentWindow': true}, function(tabs){
        let newUrl = new URL(tabs[0].url);
        currentDomain = newUrl.hostname;
});

But - trouble - currentDomain comes with subdomain.

edited Feb 12 '20 at 16:37

asked Feb 12 '20 at 16:29

Evgeniy

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Can you please edit your question to include an example input and desired output, as well as some code that you've tried? – Tyler Roper Feb 12 '20 at 16:30
sure, you was just faster then me:) – Evgeniy Feb 12 '20 at 16:33
Can you show your research effort? What have you tried to achieve this? – Can O' Spam Feb 12 '20 at 16:34
`new URL("https://us.www.example.com/folder-1/index.html").host` gives you the host. Just remove the subdomain. – Feb 12 '20 at 16:36
@CanO'Spam yep - updated – Evgeniy Feb 12 '20 at 16:38
@Amy `host` works exactly as `hostname` for me - from `https://www.example.com/folder/file.html` it delivers `www.example.com` – Evgeniy Feb 12 '20 at 16:48
1

@R3tep yes, this will be enough. Thank you! – Evgeniy Feb 12 '20 at 16:56
@Evgeniy Of course it does. Did you not read the last sentence of my comment? – Feb 12 '20 at 17:08

Getting domain without subdomain from an url with javascript

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