help-is

Small js package I use to test if a value is... (a number, a function...)

Install

$ npm install help-is

Import

This package is pure ESM. It cannot be require()'d from CommonJS.

Use import foo from 'foo' instead of const foo = require('foo') to import the package.

// Load entire build
import is from 'help-is';

If the package is used in an async context, you could use await import(…) from CommonJS instead of require(…).

You also need to make sure you're on the latest minor version of Node.js. At minimum Node.js 12.20, 14.14, or 16.0.

Read more here: sindresorhus/esm-package

Usage

is.string([1, 2, 3]);
//=> false

is.string('Hello');
//=> true

API

is.a() alias is.type()

is.defined()

is.empty()

is.hosted()

is.instance() alias is.instanceof()

is.nil() alias is.null()

is.undef() alias is.undefined()

is.args() alias is.arguments()

is.empty()

is.array()

is.arraylike()

is.bool() alias is.boolean()

is.false()

is.true()

is.date()

is.date.valid()

is.element()

is.error()

is.fn() alias is.function()

is.thenable()

is.promise()

is.num() alias is.number()

is.infinite()

is.decimal()

is.int() alias is.integer()

is.safeInteger()

is.bigInt()

is.float()

is.nan()

is.object()

is.primitive()

is.hash()

is.regexp()

is.string()

is.base64()

is.hex()

is.symbol()

is.event()

is.map()

is.weakMap()

is.set()

is.weakSet()

is.node()

is.browser()

License

MIT © Paul Nodet