TypeScript & Web APIs

TypeScript, browser APIs, WebAssembly, PWAs

121 bites

Showing Intermediate

Test yourself: Top 30 intermediate TypeScript & Web APIs interview questions →Multiple choice, with the correct answer and why it is correct on every question. Free, no sign-in.

Intermediate everything in TypeScript & Web APIs, page 7

intermediate2 min read

TypeScript Type Inference: How It Knows Without Being Told

TypeScript's type inference deduces types so you don't have to annotate everything. It infers types from variable initializations and function returns. The main footgun is its 'best common type' for arrays, which can create an overly specific union type.

We are hiring for this. Every open role lists the topics its interview covers, so you can prepare for the real thing rather than guessing.

See open roles