JSON type
Daisho Komiyama edited this page Apr 19, 2023
·
1 revision
type Primitive = string | number | boolean | null
type JSONObject = { [k: string]: JSONValue }
type JSONArray = JSONValue[]
type JSONValue = Primitive | JSONArray | JSONObject
function isJSON(arg: JSONValue) {}
isJSON("hello")
isJSON([4, 8, 15, "yo"])
isJSON({ greeting: "hello", age: 93 })
isJSON(false)
isJSON(true)
isJSON(null)
isJSON({ a: { b: [2, 3, "foo" ] } })
// NEGATIVE test cases (must fail)
// @ts-expect-error
isJSON(() => "")
// @ts-expect-error
isJSON(undefined)
// @ts-expect-error
isJSON(new BigInt(143))