typechecker

6.0.0-next.1575621524.60fb3874ce3c833627894928a96bca242a127f3d • Public • Published 5 years ago

TypeChecker

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Why?

Why should I use this instead of say instanceof?

Under certain circumstances instanceof may not return the correct results. This occurs with node's vm module especially, and circumstances where an object's prototype has been dereferenced from the original. As such, for basic == and === checks (like a === null), you're fine not using this, but for checks when you would have done instanceof (like err instanceof Error), you should try to use this instead. Plus things like isPlainObject are darn useful!

Usage

API Documentation

Install

npm

Install: npm install --save typechecker
Require: require('typechecker')

jspm

<script type="module">
    import * as pkg from '//dev.jspm.io/typechecker'
</script>

Editions

This package is published with the following editions:

typechecker/source/index.ts is typescript source code with import for modules
typechecker/edition-browsers/index.js is typescript compiled for browsers with import for modules
typechecker aliases typechecker/edition-node-13/index.js
typechecker/edition-node-13/index.js is typescript compiled for node.js 13 with require for modules