String key-value type in basic types

Search Terms

typescript string key value type

Suggestion

Add an extra heavely used type - simple Object with string keys, used a lot as "primitive Map".
Tired writing { [ key: string ]: T } each time.
Want export type StrMap<T> = { [ key: string ]: T }; as one of basic types.
Keys in Objects are not too far from strings ( Object.keys(_object).join('/') ).
This is not fully related to https://github.com/microsoft/TypeScript/pull/26797 as it's a wider use case, IMHO.

Use Cases

I'm using this type in a numerous projects in numerous modules.

Examples

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

No implementation files, tests, or entry points are named in the issue. Begin by reviewing how TypeScript represents reusable object index-signature types and the linked discussion in PR #26797; the work is complete only when the project decides whether a built-in generic string-keyed type belongs in the language and defines its intended behavior.