Objects of objects of a certain type

I am trying to create an object whose keys can be anything, but values are of a certain type.

Each object is essentially a link, that has a certain shape. Then I put them in a wrapper object like this, however each object within is typed indivdually instead of the overall object. The problem is when I try and loop over the wrapper object LINKS, it is not giving me typesaftey. How do i fix this?

erik.gh•3/3/23, 9:49 AM

type Links = {
  [K: string]: LinkProperties
}

type Links = {
  [K: string]: LinkProperties
}

erik.gh•3/3/23, 9:49 AM

like this?

GeorgeOP•3/3/23, 12:46 PM

thankyou, but when i tried this, there is no autocomplete when you do LINKS.

erik.gh•3/3/23, 12:50 PM

oh then you might just want to use what you already had and add as const to the LINKS object

GeorgeOP•3/3/23, 12:53 PM

i agree, but the wrapper object still isnt typed as containing only LinkProperties

GeorgeOP•3/3/23, 12:53 PM

or maybe ts doesnt allow doing that in general, im not sure, im very new to ts

erik.gh•3/3/23, 1:07 PM

yeah i understand not sure how to solve it tho

GeorgeOP•3/3/23, 1:15 PM

all good, thanks for you help anyway

GGeorge i agree, but the wrapper object still isnt typed as containing only LinkProperti...

awexis•3/4/23, 4:22 AM

maybe satisfies: but its more like what you had here.

https://tsplay.dev/wOLy7N

TS Playground - An online editor for exploring TypeScript and JavaS...

The Playground lets you write TypeScript or JavaScript online in a safe and sharable way.

Aawexis maybe satisfies: but its more like what you had here. https://tsplay.dev/wOLy7N

GeorgeOP•3/4/23, 4:26 AM

i agree, thanks for the help

Eerik.gh ```typescript type Links = { [K: string]: LinkProperties } ```

whatplan•3/4/23, 10:24 PM

just wanted to add that the

Record

Record

type does the same thing as this but tiny bit shorter

type LinksType =  Record<string, LinkProperties>

type LinksType =  Record<string, LinkProperties>

doesnt change all that much but cool to know

erik.gh•3/4/23, 11:18 PM

yeah right thank you

erik.gh•3/4/23, 11:19 PM

but consting an object with dynamic keys is not a thing?

Eerik.gh but consting an object with dynamic keys is not a thing?

whatplan•3/5/23, 5:02 AM

const LINKS = {
  dashboard,
  patients
}

type LinksType =  Record<keyof typeof LINKS, LinkProperties>

const LINKS = {
  dashboard,
  patients
}

type LinksType =  Record<keyof typeof LINKS, LinkProperties>

whatplan•3/5/23, 5:03 AM

hovering

LinksType

LinksType

whatplan•3/5/23, 5:03 AM

in this case LinksTypes possible keys are defined by the keys of some object

whatplan•3/5/23, 5:05 AM

you have to define the type somewhere
either it can be super generic (

Record<string, LinkProperties>

Record<string, LinkProperties>

)
or super specific (

as const

as const

)
but the whole point of a type is to know what your getting in advance
so if the type is super dynamic then you might have some challenges getting the level of autocomplete you are hoping for

whatplan•3/5/23, 5:07 AM

A type cant refer to itself

whatplan•3/5/23, 5:09 AM

So somewhere you have to tell typescript every possible value for a key in your object
If you cant describe that as a list of specific things (either by actually writing it out, or by referencing another type) the best you can do is just

string

string

(or whatever type your using to index)

erik.gh•3/5/23, 9:58 AM

that makes sense

erik.gh•3/5/23, 9:59 AM

the type would have to change as you only want to type the values first and later infer the keys

erik.gh•3/5/23, 10:00 AM

which is not a thing in ts

Objects of objects of a certain type

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