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README.md

README.md

 
 

index.ts

index.ts

 
 

README.md

KeyofBase is a keyofStringsOnly-tolerant analogue for PropertyKey

With keyofStringsOnly disabled:

import { KeyofBase } from "ts-essentials";
//      ^? string | number | symbol

type BuiltinKeys = PropertyKey;
//   ^? string | number | symbol

With keyofStringsOnly enabled:

import { KeyofBase } from "ts-essentials";
//      ^? string

type BuiltinKeys = PropertyKey;
//   ^? string | number | symbol

It's recommended to use KeyofBase since TypeScript 2.9.2 – https://devblogs.microsoft.com/typescript/announcing-typescript-2-9-2/#support-for-symbols-and-numeric-literals-in-keyof-and-mapped-object-types

keyofStringsOnly is deprecated since TypeScript 5.0 – https://devblogs.microsoft.com/typescript/announcing-typescript-5-0-beta/#deprecations-and-default-changes

TS Playground: