CODEWITHSUNDEEP
javascripttypescript
aWebDeveloper
aWebDeveloper

Reputation: 38352

Type 'string' is not assignable to type 'never'

class DetailsSummaryViewStore {

  prop1: number;
  prop2: string;



  private setData(key: keyof DetailsSummaryViewStore, data: any ) {
    this[key] = data;
  }
}

In another method of this class I calling setData and am trying to set the values of the class properties after doing a api call. What is a right way to do this.

Current error is thrown in this[key]

Upvotes: 0

Views: 186

Answers (2)

Sidney
Sidney

Reputation: 4775

That's strange, it seems to be related to having number properties.

This is fine:

class DetailsSummaryViewStore {
    prop: string;

    constructor() {
        this.prop = 'stuff'
    }

    setData(key: keyof DetailsSummaryViewStore, data: any) {
        this[key] = data;
    }
}

This causes the error you are seeing:

class DetailsSummaryViewStore {
    prop: number;

    constructor() {
        this.prop = 1
    }

    setData(key: keyof DetailsSummaryViewStore, data: any) {
        this[key] = data;
        // ERROR: Type 'any' is not assignable to type 'never'
    }
}

Upvotes: 0

iamhuynq
iamhuynq

Reputation: 5529

I think its should be

class DetailsSummaryViewStore { 
      prop1: number;
      prop2: string; 
      private setData(key: keyof DetailsSummaryViewStore, data: any ) { 
            (this[key] as any) = data; 
      } 
}

Upvotes: 1

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