Error message in TypeScript: A dynamic property name must be a valid type such as 'string', 'number', 'symbol', or 'any'

Attempting to utilize the computer property name feature in my TypeScript code:

import {camelCase} from "lodash";

const camelizeKeys = (obj:any):any => {
  if (Array.isArray(obj)) {
    return obj.map(v => camelizeKeys(v));
  } else if (obj !== null && obj.constructor === Object) {
    return Object.keys(obj).reduce(
      (result, key) => ({
        ...result,
        [camelCase(key)]: camelizeKeys(obj[key]),   // error on [camelCase(key)]
      }),
      {},
    );
  }
  return obj;
};

Encountering a compile time error:

A computed property name must be of type 'string', 'number', 'symbol', or 'any'.ts

Attempted to address this issue by referring to this Stack Overflow thread, without success.

Answer №1

Looking for typings for Lodash?

To obtain the lodash typings, you can simply run:

If you have installed them and they are still not functioning as expected, consider explicitly defining the type of camelCase(key):

[camelCase(key):string]: camelizeKeys(obj[key]),

Answer №2

After taking a cue from @Klaycon's response, I included the types that provided insight into the return type of camelCase(). This led me to successfully resolve the issue with the following code snippet:

[String(camelCase(key))]: camelizeKeys(obj[key]),

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