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When should I use ?? (nullish coalescing) vs || (logical OR)? I did see that description in that questions answer, but it's seemed like a repeat of well known JS boolean logic rather than a specific example – mikemaccana Commented Apr 28, 2020 at 13:18
What is the purpose of the dollar sign in JavaScript? A '$' in a variable means nothing special to the interpreter, much like an underscore From what I've seen, many people using jQuery (which is what your example code looks like to me) tend to prefix variables that contain a jQuery object with a $ so that they are easily identified and not mixed up with, say, integers
What is the difference between . js, . tsx and . jsx in React? In React, JavaScript (JS) is the primary language for writing code However, React code is often written using JSX and TypeScript (TSX) for type safety Here's the difference between these file extensions: js (JavaScript): JavaScript is the fundamental programming language used for building React applications