CODEWITHSUNDEEP
typescriptimmutable.js
Amala James
Amala James

Reputation: 1486

Immutable.js and Typescript

I am creating an Application using react-redux. In that i am using typescript and immutable.js. When i use immutable methods like updateIn(), for a typed object, it is throwing error.

Following is the code which i tried:

interface aType{
  id: number
}

function randFun(a:aType){
  a = a.updateIn([....]); //It is throwing error in this line of code.
}
randFun({id:2});

Property 'updateIn' doesn't exist in on type {...}

How can i get rid of this error???

Upvotes: 1

Views: 3765

Answers (1)

MartyIX
MartyIX

Reputation: 28686

As for TypeScript, it's because updateIn is not defined in aType interface. To fix it, you can write:

interface aType{
  id: number,
  updateIn(n: number): aType
}

function randFun(a:aType){
  let n = 5;    
  a = a.updateIn(n); // No error here
}
randFun({id:2}); // This still need to be fixed!

However, it can't work in JavaScript too because you can't call updateIn on {id:2} object.

Upvotes: 1

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