jQuery Validate with Required False and Additional Function

jQuery Validate is a powerful plugin that can help validate input fields on your web page. One of the features of the plugin is the ability to set a field as required or not required. In this article, we will explore how to set a field as required false and add an additional function for validation.

Setting Required False

To set a field as required false, we can use the required property of the jQuery Validate plugin. We can set this property to false to indicate that a field is not required for validation.

$("#myForm").validate({
  rules: {
    myField: {
      required: false
    }
  }
});

Adding an Additional Function

In addition to setting a field as required false, we can also add an additional function to validate the field. This function will be called when the field is being validated.

$("#myForm").validate({
  rules: {
    myField: {
      required: false,
      myFunction: true
    }
  },
  messages: {
    myField: {
      myFunction: "Please enter a valid value."
    }
  },
  myFunctions: {
    myFunction: function(value, element) {
      // Perform additional validation here
      return true; // Return true if the validation passes
    }
  }
});

In the code above, we define a new function called myFunction and set the myField to use this function for validation. We also define a message to display when the validation fails.

The myFunctions object allows us to define custom functions for validation. We can add as many functions as we want, and each function takes two parameters: the value of the field being validated and the element itself.

Inside the myFunction function, we can perform additional validation on the field. If the validation passes, we return true, which indicates that the validation has passed. If the validation fails, we return false, which will cause the validation to fail and the error message to be displayed.

Conclusion

jQuery Validate is a powerful plugin that can help validate input fields on your web page. By setting a field as required false and adding an additional function for validation, we can create custom validation rules that meet our specific needs.