Enum is not assignable to type string

Bug Report

Strings in an Enum form are not assignable to fields that require type string.

🔎 Search Terms

• Enum as a string parameter
• Enum is not assignable to type string
• TS2322

🕗 Version & Regression Information

• This is the behavior between versions 4.1.15 and 4.2.2.

⏯ Playground Link

Playground link with relevant code

💻 Code

import React from 'react'

enum Config {
    Name = 'TS',
    Width = 200,
    Height = 200
}

export default function Example(){
    return <div id={Config.Name}></div>
}

🙁 Actual behavior

The terminal is complaining with the following message:

Type 'Config' is not assignable to type 'string | undefined'.

🙂 Expected behavior

Code works without the error message.

Start with the linked TypeScript Playground repro and compare its behavior between versions 4.1.15 and 4.2.2. Trace the type-checking path for the enum value passed to the JSX string attribute, then add a regression test; done means the repro no longer reports TS2322.