typescript / beginner
Snippet
Type Assertions with 'as'
Type assertions are a way to tell the TypeScript compiler 'trust me, I know what I'm doing'. They treat an expression as a specific type without performing any special checking.
snippet.ts
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let someValue: unknown = "Hello TypeScript";let strLength: number = (someValue as string).length;
Breakdown
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someValue as string
Tells TypeScript to treat 'someValue' as a string for this operation.
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.length
Accesses the length property, which is valid because we asserted the value is a string.