TypeScript's relation to JavaScript. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript - typescriptlang.org. JavaScript is a programming language that is developed …

Jul 20, 2019 · JavaScript as the target of compilation (TypeScript design goal 4) All TypeScript must be representable in JavaScript. Further, it should be idiomatic JavaScript where possible. …

While the ?? operator isn't available in current LTS versions of Node (v10 and v12), you can use it with some versions of TypeScript or Node: The ?? operator was added to TypeScript 3.7 back …

Oct 21, 2024 · I'm working on a project using Vite, and I want to understand the difference between using TypeScript alone and TypeScript with SWC. I've searched online but couldn't …

An object in JavaScript is a key/value map, and an "object type" is typescript's way of typing those key/value maps. Both interface and type can be used when providing types for an object as …

Dec 13, 2021 · This first statement from the docs should be self explanatory for the first two statements in your code: The nullish coalescing operator (??) is a logical operator that returns …

Feb 16, 2017 · Similar to type assertions of the forms <T>x and x as T, the ! non-null assertion operator is simply removed in the emitted JavaScript code. I find the use of the term "assert" a …

TypeScript and JSX appear to both compile to JavaScript and provide static typing and classes, but they seem to be complementary and not competitors according to a few places on the web …

JavaScript freely converts between these types. When you access a method like charAt on a string primitive, JavaScript wraps it in a String object, calls the method, and then throws the …

Javascript's nice face (one of the benefits) is built-in support for duck typing. "If it walks like a duck and it quacks like a duck, then it must be a duck." So, in Javascript, if two different objects …