![]() How to use regex to validate a URL string const isValidUrl = urlString=> ))'+ // validate OR ip (v4) address To demonstrate how to validate if a string is a URL, let's create a method that will validate a JavaScript String using the regular expression constructor and return True or False based on the matched pattern. To create a regular expression using the construction method, use the RegExp() constructor and pass the pattern as a parameter. How to use a regular expression constructor For example, a protocol, https, a //, and so on. The pattern includes the validation of parts needed in the URL. In a regular expression literal, the pattern is enclosed between the slashes, as you'll see below. Note: It is appropriate to use the regular expression method when you just want to check if a string is a valid URL and don't want any other additional objects created. You can construct a regular expression in two ways: In JavaScript, regular expressions are also known as objects that provide different methods to perform various operations. Regular expressions (regex) are patterns that match character combinations in a JavaScript string. How to Check if a String is a Valid URL Using Regex To learn how to get the current URL in JavaScript, you can read this article on How to Get the Current URL in JavaScript. This tutorial will teach you some ways to check if a JavaScript string is a valid URL. This URL string must be verified to make sure it's a valid URL in such situations. In JavaScript, you may need to use a URL in the anchor tags or buttons to link the user to another webpage. URLs consist of multiple parts – protocol, domain name, and so on – that tell the browser how and where to retrieve the resource. We commonly refer to URLs as website addresses, and they're used for file transfer, emails, and other applications. ![]() A URL – or Uniform Resource Locator – is text used to identify resources like web pages, images, and videos on the internet.
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