Pros of jquery-validation

• More widely used and actively maintained
• Extensive documentation and community support
• Larger set of built-in validation methods

Cons of jquery-validation

• Slightly larger file size
• May have more features than needed for simple projects
• Requires jQuery as a dependency

Code Comparison

jquery-validation:

$("#myform").validate({
  rules: {
    name: "required",
    email: {
      required: true,
      email: true
    }
  },
  messages: {
    name: "Please enter your name",
    email: "Please enter a valid email address"
  }
});

jquery-validation:

$("#myform").validate({
  rules: {
    name: "required",
    email: {
      required: true,
      email: true
    }
  },
  messages: {
    name: "Please enter your name",
    email: "Please enter a valid email address"
  }
});

Both repositories appear to be the same project, as they have identical code examples and functionality. The comparison provided above is based on the assumption that there might be differences between the two. However, in reality, jquery-validation/jquery-validation is likely the main repository for the jQuery Validation plugin, and there is no separate jquery-validation project to compare it against.

Pros of Parsley.js

• More lightweight and faster than jQuery Validation
• Supports modern JavaScript frameworks and doesn't require jQuery
• Offers more customizable error messages and styling options

Cons of Parsley.js

• Smaller community and fewer resources compared to jQuery Validation
• Less extensive built-in validation rules
• Steeper learning curve for developers new to form validation

Code Comparison

Parsley.js:

$('#form').parsley().on('form:submit', function() {
  // Form is valid
  return false;
});

jQuery Validation:

$("#form").validate({
  submitHandler: function(form) {
    // Form is valid
    form.submit();
  }
});

Both libraries allow for easy form validation, but Parsley.js uses a more modern approach with its event-based system. jQuery Validation relies on the jQuery library and uses a more traditional configuration object. Parsley.js offers a more flexible and customizable validation process, while jQuery Validation provides a simpler setup for basic validation needs.

Pros of validator.js

• Lightweight and dependency-free, making it suitable for both browser and Node.js environments
• Supports a wide range of validation rules out of the box
• Easy to extend with custom validation rules

Cons of validator.js

• Lacks built-in form integration, requiring more manual setup for form validation
• Does not provide automatic error message display or styling

Code Comparison

validator.js:

import validator from 'validator';

const isValid = validator.isEmail('example@email.com');
console.log(isValid); // true

jquery-validation:

$("#myform").validate({
  rules: {
    email: {
      required: true,
      email: true
    }
  }
});

Summary

validator.js is a versatile, lightweight validation library that works well in various JavaScript environments. It offers a wide range of built-in validation rules and is easily extensible. However, it requires more manual setup for form validation compared to jquery-validation.

jquery-validation, on the other hand, is specifically designed for jQuery-based form validation. It provides seamless integration with HTML forms and automatic error message display. However, it has a dependency on jQuery and is primarily focused on client-side validation in web browsers.

Choose validator.js for a flexible, lightweight solution that can be used in both browser and Node.js environments. Opt for jquery-validation if you're working with jQuery and need a more automated form validation solution with built-in UI feedback.