Validating user input to ensure its accuracy and adherence to specific criteria is essential for maintaining the integrity of data in any application. One common way to validate user input in JavaScript is through the use of the “checkValidity()” method. This method is supported by HTML input elements and allows developers to programmatically check whether the value entered by the user meets the validation criteria specified in the input element’s attributes.
To use the “checkValidity()” method, you first need to select the input element you want to validate using JavaScript’s DOM manipulation methods. Once you have a reference to the input element, you can call the “checkValidity()” method on it. This method will return a boolean value indicating whether the input value is valid or not.