dfoverdx / better-global-types

Some stronger TypeScript types for global objects

@dfoverdx/better-global-types

Some augmentations of global methods that could be better. I'll update these as I think of them.

This package has a peer requirement of typescript@>=4.1.0 since it uses template literal types.

Installation

# npm
npm i -D @dfoverdx/better-global-types

# yarn
yarn add -D @dfoverdx/better-global-types

List of current augmentations

ObjectConstructor

Object.keys()

Return type now infers the actual keys of the object passed in. When an array is passed in, knows only to return numeric keys (as strings) and any extra properties you may have attached to it--ones not on the array prototype. It knows not to include symbols.

Known issues

• Since TS currently has no way to infer an object's constructor, the type returned will include any prototype members as possible keys excluding those of Object.prototype and Array.prototype.

Object.entries()

Return type now infers the types of the key-value pairs of the object passed in, rather than [string, T[keyof T]]. Like Object.keys(), it handles array properly. It knows not to include tuples for symbol properties.

Known issues

• Since TS currently has no way to infer an object's constructor, the type returned will include key-value pairs of any prototype members as possible keys excluding those of Object.prototype and Array.prototype.

Object.fromEntries()

Return type now correctly infers the shape of the object.