Typpy is a lightweight utility for checking JavaScript types. It provides a simple and consistent API to determine the type of a given value, making it easier to handle type checking in your code.
Type Checking
Typpy allows you to check the type of a given value. It returns a string representing the type, such as 'number', 'string', 'object', 'array', 'null', 'undefined', or 'function'.
const typpy = require('typpy');
console.log(typpy(42)); // 'number'
console.log(typpy('Hello')); // 'string'
console.log(typpy({})); // 'object'
console.log(typpy([])); // 'array'
console.log(typpy(null)); // 'null'
console.log(typpy(undefined)); // 'undefined'
console.log(typpy(() => {})); // 'function'Type Comparison
Typpy provides a method to compare a value against a specified type. It returns true if the value matches the type, and false otherwise.
const typpy = require('typpy');
console.log(typpy.is(42, 'number')); // true
console.log(typpy.is('Hello', 'string')); // true
console.log(typpy.is({}, 'object')); // true
console.log(typpy.is([], 'array')); // true
console.log(typpy.is(null, 'null')); // true
console.log(typpy.is(undefined, 'undefined')); // true
console.log(typpy.is(() => {}, 'function')); // trueCustom Type Checking
Typpy can also handle custom types. When you create an instance of a custom class, Typpy will return the class name as the type.
const typpy = require('typpy');
class CustomType {}
const customInstance = new CustomType();
console.log(typpy(customInstance)); // 'customtype'
console.log(typpy.is(customInstance, 'customtype')); // trueThe 'typeof' package provides a simple way to get the type of a value. It is similar to Typpy but offers a more minimalistic approach. Unlike Typpy, it does not support custom type checking.
The 'type-detect' package is another utility for type checking in JavaScript. It offers more detailed type detection compared to Typpy, including support for detecting specific object types like 'RegExp' and 'Date'.
The 'is' package provides a comprehensive set of type-checking functions. It is more feature-rich compared to Typpy, offering additional checks for types like 'boolean', 'error', and 'buffer'.
A better typeof for JavaScript.
# Using npm
npm install --save typpy
# Using yarn
yarn add typpy
// Dependencies
var Typpy = require("typpy");
console.log(Typpy(0));
// => "number"
console.log(Typpy("", String));
// => true
console.log(Typpy.is(null, "null"));
// => true
console.log(Typpy.get([]));
// => Array
console.log(Typpy({}, true));
// => false
console.log(Typpy({}, Object));
// => true
console.log(Typpy.get({}));
// => Object
console.log(Typpy.get(42, true));
// => "number"
There are few ways to get help:
Typpy(input, target)Gets the type of the input value or compares it with a provided type.
Usage:
Typpy({}) // => "object"
Typpy(42, Number); // => true
Typpy.get([], "array"); => true
input: The input value.target: The target type. It could be a string (e.g. "array") or a
constructor (e.g. Array).true if the input has the provided type target (if was provided),
false if the input type does not have the provided type
target or the stringified type of the input (always lowercase).Typpy.is(input, target)Checks if the input value has a specified type.
input: The input value.target: The target type. It could be a string (e.g. "array") or a
constructor (e.g. Array).true, if the input has the same type with the target or false otherwise.Typpy.get(input, str)Gets the type of the input value. This is used internally.
input: The input value.str: A flag to indicate if the return value should be a string or not.Have an idea? Found a bug? See how to contribute.
I open-source almost everything I can, and I try to reply to everyone needing help using these projects. Obviously, this takes time. You can integrate and use these projects in your applications for free! You can even change the source code and redistribute (even resell it).
However, if you get some profit from this or just want to encourage me to continue creating stuff, there are few ways you can do it:
Starring and sharing the projects you like :rocket:
—I love books! I will remember you after years if you buy me one. :grin: :book:
—You can make one-time donations via PayPal. I'll probably buy a coffee tea. :tea:
—Set up a recurring monthly donation and you will get interesting news about what I'm doing (things that I don't share with everyone).
Bitcoin—You can send me bitcoins at this address (or scanning the code below): 1P9BRsmazNQcuyTxEqveUsnf5CERdq35V6
Thanks! :heart:
If you are using this library in one of your projects, add it in this list. :sparkles:
ulscrape-iterrbug-killertildadeffycouleursauto-parsebarbeelm-selectexec-limitercolor-itdiablewrite-file-pobj-flattencli-gh-calcute-loggerbloggify-ajs-rendererpage-changedtransformerbloggify-flexible-routerbloggify-renderer-ajsgit-statsengine-parserengine-builderennyengine-flow-typesgh-reposghcalghostyasyncer.jsbabel-itblahcli-circlevalidifylimit-itobj2envlynn-touchscrape-it-plus@slikts/scrape-itdom-repeateranimatogit-stats-importerregardeflattenizeFAQs
A better typeof for JavaScript.
The npm package typpy receives a total of 121,390 weekly downloads. As such, typpy popularity was classified as popular.
We found that typpy demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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