Regular expression for URL

Question

I have written regex to validate URL which could be either like

• example.com

• www.example.com

• http://www.example.com

Answer 1

This is to support both http, https as optional and validate blank space is not included in url.

this.isValidURL = function (url) {

    if (!url) return false;

    const expression = /^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$/gm;

    return url.match(new RegExp(expression));
}