54 replies

typescript - property is missing in type ... but property exists

in js, you can do the following:

let x = 'b';

let y = {
    [x]: 6
};

console.log(y);

let x = 'b';

let y = {
    [x]: 6
};

console.log(y);

and you will see it has the property

set to

, as expected.

however, typescript trips up in the following code:

let x: string = 'b';

let y: {b: number} = {
    [x]: 6,
};

console.log(y);

let x: string = 'b';

let y: {b: number} = {
    [x]: 6,
};

console.log(y);

Property 'b' is missing in type '{ [x]: number; }' but required in type '{ b: number; }'.

it doesn't make any sense at all, as

[x]

[x]

and

are the same property! exactly the same thing!

so, how do i make typescript see and accept that there is nothing wrong with this, besides

@ts-ignore

@ts-ignore