component-type
Advanced tools
Package description
The component-type npm package is a simple utility for checking the type of a JavaScript value. It is useful for type checking and validation in JavaScript applications.
Type Checking
This feature allows you to check the type of a given JavaScript value. The function returns a string indicating the type of the value.
"use strict"; var type = require('component-type'); console.log(type([])); // 'array' console.log(type({})); // 'object' console.log(type('')); // 'string' console.log(type(123)); // 'number' console.log(type(true)); // 'boolean' console.log(type(null)); // 'null' console.log(type(undefined)); // 'undefined' console.log(type(function(){})); // 'function' console.log(type(new Date())); // 'date' console.log(type(/a-z/)); // 'regexp' console.log(type(new Error())); // 'error'The 'typeof' package is similar to 'component-type' in that it provides type checking for JavaScript values. However, 'typeof' might have different ways of type representation and may not cover as many types as 'component-type'.
The 'type-is' package is used to determine the content-type of an object, particularly useful for HTTP requests. While it also deals with types, it is more focused on MIME types rather than JavaScript value types.
The 'is-type-of' package provides type checking functionalities similar to 'component-type'. It includes additional checks for specific JavaScript types like 'error', 'buffer', 'promise', etc., and may offer a more extensive set of type checking utilities.
Readme
Type assertions aka less-broken
typeof
npm install component-type
import type from 'component-type';
const date = new Date();
console.log(type(date));
//=> 'date'
type(new Date) === 'date'
type({}) === 'object'
type(null) === 'null'
type(undefined) === 'undefined'
type('hey') === 'string'
type(true) === 'boolean'
type(false) === 'boolean'
type(12) === 'number'
type(type) === 'function'
type(/asdf/) === 'regexp'
type((function(){ return arguments })()) === 'arguments'
type([]) === 'array'
type(document.createElement('div')) === 'element'
type(NaN) === 'nan'
type(new Error('Oh noes')) === 'error'
type(new Buffer) === 'buffer'
It makes no guarantees about the correctness when fed untrusted user-input.
FAQs
Type assertions aka less-broken `typeof`
The npm package component-type receives a total of 1,067,394 weekly downloads. As such, component-type popularity was classified as popular.
We found that component-type demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 21 open source maintainers collaborating on the project.
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