- 5Represent Non-Primitive Types with TypeScript’s object Type3m 3s
Represent Non-Primitive Types with TypeScript’s object Type
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TypeScript 2.2 introduced the object, a type that represents any non-primitive type. It can be used to more accurately type methods such as Object.create. Don't confuse it with the Object type or {}, the empty object type, though!
I’m having a hard time understanding primitive types. If null is one of the primitives, why is typeof null ‘object’?. And then why can’t we assign null to something with type object?
@Brendan: typeof null evaluating to "object" is a bug that we've been stuck with for two decades (see The history of “typeof null”); unfortunately, it can't be fixed without breaking a ton of JavaScript code.
When you use --strictNullChecks (which you should!), null is not assignable to object. If it were, that would defeat the whole purpose of strict null checking.
Interesting