Creating a new object with inline syntax for an interface in Typescript

Many claim that you can create an object using interface in the following manner:

let obj: ILookup = { id: 1, name: 'abc'}

Could you please provide me with the syntax to write this inline, for example like so:

lookups.push(ILookup = { id: 1, name: 'abc'})
?

Answer №1

In situations where the compiler struggles to determine the type based on context, you have the option to assert the type yourself to ensure accuracy. It's a way of confidently telling the compiler that you know what you're doing. (https://www.typescriptlang.org/docs/handbook/basic-types.html#type-assertions)

lookups.push({ id: 1, name: "abc" } as ILookup)

Although using type assertions is effective, TypeScript can often discern the intended type without explicit assertion when passing an argument to a function like lookup.push. If lookups is of type ILookup[], TypeScript is smart enough to recognize that { id: 1, name: "abc" } fits the criteria perfectly.

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