es-to-primitive/es5.d.ts

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

declare function ToPrimitive(
    input: ToPrimitive.unknownES5,
    hint?: StringConstructor | NumberConstructor,
): ToPrimitive.primitiveES5;

declare namespace ToPrimitive {
    export type primitiveES5 =
        | null
        | undefined
        | string
        | number
        | boolean
    ;
    export type unknownES5 = primitiveES5 | object;
}

export = ToPrimitive;