Jul 20, 2019 · In JavaScript, it's commonly seen as best practice to use === instead of ==, for obvious and well-known reasons. In TypeScript, which is one to be preferred? Is there even …

Jan 17, 2017 · Yes. As of TypeScript 3.7 (released on November 5, 2019), this feature is supported and is called Optional Chaining: At its core, optional chaining lets us write code …

The ?? operator was added to TypeScript 3.7 back in November 2019. And more recently, the ?? operator was included in ES2020, which is supported by Node 14 (released in April 2020).

What is the TypeScript language? What can it do that JavaScript or available libraries cannot do, that would give me reason to consider it?

Feb 16, 2017 · In TypeScript, what is the ! (exclamation mark / bang) operator when dereferencing a member? Asked 8 years, 8 months ago Modified 5 months ago Viewed 651k …

Declaration Merging The key aspect to interfaces in typescript that distinguish them from types is that they can be extended with new functionality after they've already been declared. A …

Learn how to dynamically assign properties to an object in TypeScript with this helpful guide.

Jul 26, 2018 · TypeScript can infer types from values, but you can't generate values from types. const fruit = ["apple", "banana", "grape"] as const; export type Fruit = (typeof fruit)[number]; …

Oct 30, 2012 · I have defined function with typescript without defining a type. You can define a function with callback type parameter like below. You can define multiple return values in the …

Apr 7, 2016 · Is key-value pair available in TypeScript? If so, how do I do that? Can anyone provide sample, example, or links?