TypeScript types to restrict array values

Question

Can I use TypeScript types to restrict array inputs to certain elements?

For example, if I wanted to create a type that is an array that could hold any number of elements, but the elements are restricted to the values: "dog" , 3 , and true , could I do this without allowing any other string, number, or boolean values?

Answer 1

Using type dogList = Array<"dog" | 3 | true>; type dogList = Array<"dog" | 3 | true>; to define the type then assigning it to a variable with const list1: dogList = ["dog", 3, true, true]; works properly.