What are feature detection techniques in JavaScript?

Next.js by Vercel is the full-stack React framework for the web. format('MMMM Do YYYY, h:mm:ss a'); // May 1st 2025, 5:00:05 pm moment().format('dddd ... js is freely distributable under the terms of the MIT license. May 25, 2022 ... Double negation converts truthy values to the true Boolean and falsy values to the false Boolean . It is not a distinct JavaScript operator, but ... First, What Is JavaScript? From the W3C Schools Site: JavaScript was ... Frameworks don't really do anything by themselves, they just provide an easier ... React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. JavaScript is a lightweight programming language commonly used by web developers to add dynamic interactions to web pages, applications, servers, and even ... Great Exceptions. Tests fail—when they do, Jest provides rich context why. ... Jest is a JavaScript testing framework designed to ensure correctness of any ... ... do. Native development for everyone. React Native ... Try watching this video on www.youtube.com, or enable JavaScript if it is disabled in your browser. This means that your existing working JavaScript code is also TypeScript code. ... There are two popular ways to do so: unions and generics. Unions. With a ... Full documentation on everything you can do with the JSDOM class is below, in the section " JSDOM Object API". Customizing jsdom. The JSDOM constructor accepts ...