How to create object based on an interface where each value is set to 'true'?-CodePudding

Given an interface

interface Foo {
  value1: boolean;
  value2: boolean;
}

how may I create an object based on this interface that has all its value set to true (or false)?

Something that might illustrate what I mean:

const object: Foo = { [keyof Foo]: true }

Any help would be much appreciated.

CodePudding user response：

We should create a class that implements the interface and use it to construct new objects:

class FooImpl implements Foo {
  
  constructor(value1: boolean, value2: boolean) {
       this.value1 = value1;
       this.value2 = value2;
  }
}

and later use it:

const F = new FooImpl(true, true);

CodePudding user response：

Do the opposite and derive Foo from your variable:

const object = {
  value1: true,
  value2: true,
};

type Foo = typeof object;

If you need an interface (for its marginal differences in behavior vs type) you could do something like this:

type _Foo = typeof object;

interface Foo extends _Foo {}