Nerdware TypeScript Type-Safety Utils

TypeScript type-guards and other type-safety utils for any environment 🎉
ESM ✅ CommonJS ✅ NodeJS ✅ browsers ✅

• 🚀 Getting Started
  • 📦 Installation
  • 🛠️ Usage
• ⚙️ API
  • Is-x type-guards
  • Other type-guards
• 🤝 Contributing
• 📝 License
• 💬 Contact

🚀 Getting Started

This package provides a lightweight set of TypeScript type-guards and other type-safety utils to suit common use cases.

📦 Installation

Install the package using your package manager of choice:

npm:

npm install @nerdware/ts-type-safety-utils

yarn:

yarn add @nerdware/ts-type-safety-utils

🛠️ Usage

import { isPlainObject } from "@nerdware/ts-type-safety-utils";

// or const { isPlainObject } = require("@nerdware/ts-type-safety-utils");

const fooFn = (input: unknown) => {
  if (isPlainObject(input)) {
    // TS knows `input` is a plain object
  } else {
    // TS knows `input` is not a plain object
  }
};

⚙️ API

Is-x type-guards

Function	Description
isArray	Checks if a value is an array or readonly array
isBigInt	Checks if a value is a BigInt
isBoolean	Checks if a value is a boolean
isBuffer	Checks if a value is a NodeJS Buffer (this is a no-op in browser envs)
isDate	Checks if a value is a Date
isError	Checks if a value is an Error, an Error subclass, or DOMException
isFunction	Checks if a value is a function
isNull	Checks if a value is null
isObjectLike	Checks if a value is "object-like" (typeof "object" and not null)
isPlainObject	Checks if a value is a plain object
isSafeInteger	Checks if a value is a safe integer
isString	Checks if a value is a string
isSymbol	Checks if a value is a symbol
isUndefined	Checks if a value is undefined
isUnsafeNumber	Checks if a value is typeof "number" (🚨 allows NaN and other "number" values)

Other type-guards

Function	Description
getTypeSafeError	Converts any argument into an Error object
hasKey	Checks if an object contains the provided key
hasKeys	Checks if an object contains all provided keys
safeJsonStringify	Type-safe JSON.stringify which will not throw if the input contains circular references or BigInts

🤝 Contributing

Pull requests are welcome! Before you begin, please check existing GitHub Issues and Pull Requests to see if your idea is already in the pipeline. If not, here's a guide on how to contribute to this project. Thank you!

📝 License

All files, scripts, and source code contained herein are open-source software licensed under an MIT License.

See LICENSE for more information.

💬 Contact

Trevor Anderson — [email protected] — @TeeRevTweets

     

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