Proposal: add toLowerCase() and toUpperCase()
String.prototype.toLowerCase() and String.prototype.toUpperCase() are typed as returning string. This doesn't make use of the relatively recently added Uppercase<T> and Lowercase<T> types in TypeScript.
I propose adding two functions to this library:
function toLowerCase<T extends string>(string: T): Lowercase<T>;function toUpperCase<T extends string>(string: T): Uppercase<T>;
sindresorhus / ts-extras
Essential utilities for TypeScript projects
591
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