TypeScript - Set both default value and available values for class property

Question

I have a question is that how I can set the class property's default value and all available values in once. For example:

class MyClass{
  isActive = -1; //Set default value
}

class MyClass{
  isActive: -1 | 0 | 1; //Set all available value
}

And I want to do sth like this:
class MyClass{
  //isActive = -1 && isActive: -1 | 0 | 1
}

Set all available value is setting a type

Aleksey L.
– Aleksey L.

2020-03-11 05:38:23 +00:00
Commented Mar 11, 2020 at 5:38 — Aleksey L.
– Aleksey L., Commented Mar 11, 2020 at 5:38

CertainPerformance · Accepted Answer · 2020-03-11 04:20:52Z

2

You can use the syntax:

class MyClass {
    isActive: -1 | 0 | 1 = -1;
}

Just like it would be with a standalone variable name.

let isActive: -1 | 0 | 1 = -1;

answered Mar 11, 2020 at 4:20

CertainPerformance

373k55 gold badges354 silver badges359 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

TypeScript - Set both default value and available values for class property

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related