How to get the base domain from a full URL

Posted on January 1, 2024

To extract the base domain from a full URL in JavaScript, you can create a function that utilizes the URL constructor to parse the full URL, and then access the hostname property of the resulting object, which provides the base domain, effectively separating it from other components like the protocol, path, or query parameters.

Here the code:

const getBaseURLOnly = s => {
    let res = s
        let url = new URL(s)
        res = url.origin
                console.log('invalid url', s)
    return res