The index type cannot be represented as 'Type {}'

I'm currently utilizing ramda's toPairs method.

import { toPairs } from 'ramda';

renderMenuItems({ copy, remove, add, update }) {
    return (
      toPairs({ copy, remove, add, update })
        // verify if the value is a function.
        .filter(([, val]) => typeof val === 'function')
        .map(([key, value], idx) =>
          <MenuItem
            key={idx}
            icon={ICONS[key]} //Error: Type '{}' cannot be used as an index type
            caption={CAPTIONS[key]}
            onClick={() => value()}
          />,
      )
    );
  }

The types of key and value are both {}. However, according to the documentation (), it should be a string. Can anyone provide assistance in resolving this issue?

Answer №1

Thank you for your assistance.

With the help I received, I managed to resolve the issue by specifying the types of key and value in the object passed to the function toPairs. This information was found in the test cases on Github documentation for @types.ramda (https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/ramda/ramda-tests.ts)

Below is the solution provided:

 return (
      toPairs<string, number>({ copy, remove, add, update })
      ...

It appears that the default type is {} for both the key and the value

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