TypeScript

Asserting DOM element types in TypeScript

TypeScriptVariables and DeclarationsType Assertionsbeginner

What this snippet does

Assertions are useful for untyped JSON payloads or DOM queries where you know the structure better than the compiler.

Expected output

Alice

Why practise typing this

Typing variables and declarations code builds muscle memory for the symbols and indentation TypeScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

More TypeScript practice

Browse all TypeScript snippets →