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Simple Type checking and assertions for javascript primitive types.

This package works with Cloudflare Workers, Node.js, Deno, Bun, Browsers
This package works with Cloudflare Workers
This package works with Node.js
This package works with Deno
This package works with Bun
This package works with Browsers
JSR Score
100%
Published
2 months ago (0.2.4)

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
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Add Package

deno add jsr:@justinmchase/type

Import symbol

import * as type from "@justinmchase/type";

---- OR ----

Import directly with a jsr specifier

import * as type from "jsr:@justinmchase/type";

Add Package

npx jsr add @justinmchase/type

Import symbol

import * as type from "@justinmchase/type";

Add Package

yarn dlx jsr add @justinmchase/type

Import symbol

import * as type from "@justinmchase/type";

Add Package

pnpm dlx jsr add @justinmchase/type

Import symbol

import * as type from "@justinmchase/type";

Add Package

bunx jsr add @justinmchase/type

Import symbol

import * as type from "@justinmchase/type";