Typescript - Allowed values for a property

Question

What it the best way in Typescript to only allow a number of value for a property ?

class Foo {
    public type:string         


        

Answer 1

You can use enums:

enum MyType {
  Foo1 = 'foo1',
  Foo2 = 'foo2',
}

class FooClass {
  private foo: MyType;

  constructor(foo: MyType) {
    this.foo = foo;
  }
}

let bar = new FooClass(MyType.Foo2);

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