Typescript not nested object type

Question

I want to declare generic object type that is not nested (value is not object/array, only primitive)

For example:

Valid:

{
 a:"value",
 b:false,
 c:4
}

Invalid:

{
a:{b:"c"}
}

{
a:[5]
}

Something like this (of course it's invalid declaration):

interface NotNestedObject  {
  [x: any]: not Array/Object;
}

Sherif Elmetainy · Accepted Answer · 2020-08-10 16:41:32Z

3

Luckily there aren't many primitive types in typescript, so you can just simply list them all in a union type.

interface NotNestedObject  {
    [x: string]: number|boolean|string|null|undefined;
}

if you want dates to be included

interface NotNestedObject  {
    [x: string]: number|boolean|string|Date|null|undefined;
}

if you want functions also to be included

interface NotNestedObject  {
    [x: string]: number|boolean|string|Date|Function|null|undefined;
}

And of course you can remove null and undefined if you don't want them to be allowed. They are included by default unless you enable strictNullChecks compiler option.

answered Aug 10, 2020 at 16:41

Sherif Elmetainy

4,5821 gold badge16 silver badges27 bronze badges

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

Collectives™ on Stack Overflow

Typescript not nested object type

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