FavJS

FAVJS is a Javascript library which is used for form validations. Since it is written in plain Javascript, it can be used in any framework or in Vanilla Javascript.

Install

It can be installed using npm. Install it using

npm install favjs

Once installed, you can add index.js directly from node_modules/favjs folder.

<script src="node_modules/favjs/index.js"></script>

or

You can import the module using ES6

import Fav from 'favjs'

Example

import Fav from 'favjs'

let formData = {
    name: "My Name",
    email: "[email protected]",
    password: "mypassword"
}

let fav = new Fav(formData);
fav.name("Name").value("name").required();
fav.name("Email").value("email").required().isEmail();
fav.name("Password").value("password").required().password();
if(fav.isSuccess()) {
    // Validation is success
} else {
    let errors = fav.getErrors();
}

Error Response

The response from fav.getErrors() will be as shown below.

{
    name: "Name is required",
    email: "Email is required",
    password: "Password must contain atleast 8 characters, one uppercase letter, one special character and one numeric value"
}

Methods

Method | Description -----|------- name(name) | Name of the input field value(value) | Value of the input required() | Check whether the value is empty integer() | Check whether the value is integer minValue(size) | Check whether the integer value is not less than size. maxValue(size) | Check whether the integer value is not greater than size. maxLength(size) | Check the maximum character length of the string. minLength(size) | Check the minimum character length of the string. isUrl() | Check if the string is URL. isEmail() | Check if the string is an email. password() | Check if the string contains min length of 8 chars, max length of 32 chars, atleast 1 upper case letter, 1 numeric digit and 1 special character. pattern(pattern) | Match string with given pattern. equals(value) | Match string with given value isSuccess() | Check if the data is valid or not. getErrors() | Get errors in case validation fails.

Alright, happy coding :)