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[Solved] Typescript: No index signature with a parameter of type ‘string’ was found on type ‘{ “A”: string; }

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error Typescript: No index signature with a parameter of type ‘string’ was found on type ‘{ “A”: string; } in javascript. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How To Solve Typescript: No index signature with a parameter of type ‘string’ was found on type ‘{ “A”: string; } Error ?

  1. How To Solve Typescript: No index signature with a parameter of type 'string' was found on type '{ “A”: string; } Error?

    To Solve Typescript: No index signature with a parameter of type 'string' was found on type '{ “A”: string; } It's HIGHLY recommended that you cast the object with the proper type instead of any. Casting an object as any only help you to avoid type errors when compiling typescript but it doesn't help you to keep your code type-safe.

  2. Typescript: No index signature with a parameter of type 'string' was found on type '{ “A”: string; }

    To Solve Typescript: No index signature with a parameter of type 'string' was found on type '{ “A”: string; } It's HIGHLY recommended that you cast the object with the proper type instead of any. Casting an object as any only help you to avoid type errors when compiling typescript but it doesn't help you to keep your code type-safe.

Solution 1

Also, you can do this:

(this.DNATranscriber as any)[character];

It’s HIGHLY recommended that you cast the object with the proper type instead of any. Casting an object as any only help you to avoid type errors when compiling typescript but it doesn’t help you to keep your code type-safe.

E.g.

interface DNA {
    G: "C",
    C: "G",
    T: "A",
    A: "U"
}

And then you cast it like this:

(this.DNATranscriber as DNA)[character];

Solution 2

This was what I did to solve my related problem

interface Map {
  [key: string]: string | undefined
}

const HUMAN_MAP: Map = {
  draft: "Draft",
}

export const human = (str: string) => HUMAN_MAP[str] || str

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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