type

Simple type inference for javascript runtimes

Usage

import { Type, type } from "https://deno.land/x/type/mod.ts";

const value: unknown = BigInt(100);
const [t, v] = type(value); // [Type.BigInt, bigint]

Additionally, each type has an is{Type}, assert{Type}, and assert{Type}Type helper function available.

import { type } from "https://deno.land/x/type/mod.ts";
import {
  assertBigInt,
  assertBigIntType,
  isBigInt,
} from "https://deno.land/x/type/src/bigint.ts";

const [t, v] = type(BigInt(100));
isBigInt(v); // true
assertBigInt(v); // void
assertBigIntType(t); // void

Type Map

value	type	as
`[]`	`Type.Array`	`unknown[]`
`BigInt(100)`	`Type.BigInt`	`bigint`
`true\|false`	`Type.Boolean`	`boolean`
`new Error()`	`Type.Error`	`Error`
`() => {}`	`Type.Function`	`Function`
`null`	`Type.Null`	`null`
`1.23`	`Type.Number`	`number`
`{}`	`Type.Object`	`Record<string, unknown>`
`""`	`Type.String`	`string`
`Symbol()`	`Type.Symbol`	`symbol`
`undefined`	`Type.Undefined`	`undefined`