If you’re building our JavaScript from source, it requires util.js.

If you are building JavaScript from source, you will need to include util.js as a dependency. Util.js is a utility library that provides various helper functions for JavaScript programming. It is often used in conjunction with other libraries or frameworks to provide additional functionality. You can typically find util.js in the same repository or package as the main JavaScript library you are using. Make sure to include it in your project before building the JavaScript code to avoid any errors.