hasValue()

A boolean Sniper method which is used to check if an element has a value or not

Using the hasValue() Method in Input Fields

The hasValue() method helps determine if an input field holds a significant value. Here's a rundown of its use cases:

• Decimal Numbers: A value like 0.5 returns true, whereas an empty string returns false.

• Negative Values: Entries such as -1 return true. Yet, a string or numerical 0 returns false.

• Input Types: Applicable to radio buttons and checkboxes to check selection status.

Key Takeaways

• The hasValue() method returns a boolean: true if the input has a value, false if not.

• It can be used across different input types and other elements that works with value attributes, making it versatile for data validation.

Example:

$("#firstname-input").hasValue() // returns true or false

Check if Form Elements Has values using hasValue()

The hasValue method allows you to verify if multiple form elements contain valid values. Whether you have a form with drop-down menus, radio buttons, various input types, checkboxes, or other elements, you can easily test all of them at once for validity.

Example usage:

$('#form > input, #country-dropdown, #gender-radio, .hobby-checkboxes*').hasValue();

This checks if the specified elements have values, streamlining validation.