i require assistance from the typesafe cult (solved)

type the keys on a const object while preserving their assigned values.

const FileNamesMap: {[key: string]: string[]} = {
   'Activity': [
      'Following',
      'Likes',
   ],
   'Comments': ['Comments'],
   'Direct Messages': ['Direct Messages'],
   'Profile': ['Profile Info'],
   'Videos': ['Videos'],
} as const

const FileNamesMap: {[key: string]: string[]} = {
   'Activity': [
      'Following',
      'Likes',
   ],
   'Comments': ['Comments'],
   'Direct Messages': ['Direct Messages'],
   'Profile': ['Profile Info'],
   'Videos': ['Videos'],
} as const

So like this, but I don't want to give the values a type of string[]. I want the key Activity to literally correspond to the value 'Following', 'Likes'] as const Is this even possible? cause:

The type 'readonly ["Following", "Likes"]' is 'readonly' and cannot be assigned to the mutable type 'string[]'.

The type 'readonly ["Following", "Likes"]' is 'readonly' and cannot be assigned to the mutable type 'string[]'.

4 Replies

Brendonovich•17mo ago

new typescript feature has you covered 😉

const FileNamesMap = {
  Activity: ["Following", "Likes"],
  Comments: ["Comments"],
  "Direct Messages": ["Direct Messages"],
  Profile: ["Profile Info"],
  Videos: ["Videos"],
} as const satisfies Record<string, readonly string[]>;

const FileNamesMap = {
  Activity: ["Following", "Likes"],
  Comments: ["Comments"],
  "Direct Messages": ["Direct Messages"],
  Profile: ["Profile Info"],
  Videos: ["Videos"],
} as const satisfies Record<string, readonly string[]>;

chmod•17mo ago

omg satisfies was the answer??

Brendonovich•17mo ago

yep

chmod•17mo ago

wow ty

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i require assistance from the typesafe cult (solved)