type-plus/ts/json.ts

Provides additional types for TypeScript.

export type JSONTypes = JSONPrimitive | JSONObject | JSONArray

export type JSONPrimitive = boolean | number | string | null

export type JSONObject = { [key in string]?: JSONTypes }

export type JSONArray = Array<JSONTypes>

export const JSONTypes = { get }

function get<T extends JSONTypes>(obj: JSONTypes, ...props: Array<string | number>): T | undefined {
	if (props.length === 0) return obj as T
	if (typeof obj !== 'object' || obj === null) return undefined
	const p = props.shift()!
	// @ts-ignore
	return get(obj[p], ...props) as T
}