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robertcoopercode/type-alias-annotation.ts

Created January 9, 2019 00:29
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type-alias-annotation.ts
type Animal = {
kind: string;
weight: number;
}
let dog: Animal;
dog = {
kind: 'mammal',
weight: 10
} // ✅
dog = {
kind: true,
weight: 10
} // ❌ - kind should be a string
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