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A collection of utilities that makes your TS code safer and cleaner

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Powerful TypeScript features like assertion functions or user-defined type guards are only useful if paired with utility functions.

TypeScript, however, only exports type helpers (e.g. Record, ReturnType, etc.).

This module provides «the missing builtins» such as the assert function and corrects frustrating aspects of default utility type such as ReturnType.

tsafe is both an NPM and a Deno module. (Achieved with denoify)

Import in deno:

import { assert, typeGuard, ... } from "";

Install elsewhere:

$ npm install --save tsafe
$ yarn add tsafe

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