Skip to content
Validation made easy.
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.


Support me on Patreon Buy me a book PayPal Ask me anything Version Downloads Get help on Codementor

Buy Me A Coffee

Validation made easy.

☁️ Installation

# Using npm
npm install --save validify

# Using yarn
yarn add validify

📋 Example

const validify = require("validify");

console.log(validify("Hello World", String, "The input should be a string.").valid);
// => true

console.log(validify(NaN, Number, "The input is not a valid number.").error);
// => [Error: The input is not a valid number.]

console.log(validify("", /\S+@\S+/, "The email is invalid.").error);
// => null

console.log(validify("", /\S+@\S+/, {
    message: "The email is invalid."
  , code: "INVALID_EMAIL"
// => { [Error: The email is invalid.] code: 'INVALID_EMAIL' }

console.log(validify(42, x => x > 18 && x <= 42, "The input should be greater than 18 and lower or equal than 42.").error);
// => [Error: The input should be greater than 18 and lower or equal than 42.]

Get Help

There are few ways to get help:

  1. Please post questions on Stack Overflow. You can open issues with questions, as long you add a link to your Stack Overflow question.

  2. For bug reports and feature requests, open issues. 🐛

  3. For direct and quick help, you can use Codementor. 🚀

📝 Documentation

validify(input, type, errMessage)

Validates the input against the validation method.


  • Anything input: The input value.
  • Function|String|RegExp type: The validation type.
  • Object|Error|String errMessage: The error message interpreted by err.


  • Object An object containing:
  • error (Error|null): The Error object (if any), or null.
  • valid (Boolean): true if the input is valid, false otherwise.

😋 How to contribute

Have an idea? Found a bug? See how to contribute.

💖 Support my projects

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 🚀

  • Buy me a book—I love books! I will remember you after years if you buy me one. 😁 📖

  • PayPal—You can make one-time donations via PayPal. I'll probably buy a coffee tea. 🍵

  • Support me on Patreon—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! ❤️

💫 Where is this library used?

If you are using this library in one of your projects, add it in this list.

📜 License

MIT © Ionică Bizău

You can’t perform that action at this time.