What is checkvalidity and reportvalidity in JavaScript?

checkValidity (): Returns true if the element's value has no validity problems; false otherwise. If the element is invalid, this method also fires an invalid event on the element. reportValidity (): Reports invalid field (s) using events. This method is useful in combination with preventDefault () in an onSubmit event handler.

What is willvalidate() & checkvalidity()?

willValidate: Returns true if the element will be validated when the form is submitted; false otherwise. The Constraint Validation API also makes the following methods available on the above elements and the form element. checkValidity (): Returns true if the element's value has no validity problems; false otherwise.

What is setcustomvalidity in JavaScript?

setCustomValidity (message): Adds a custom error message to the element; if you set a custom error message, the element is considered to be invalid, and the specified error is displayed. This lets you use JavaScript code to establish a validation failure other than those offered by the standard HTML validation constraints.

What is JavaScript validation?

JavaScript validation is coded using JavaScript. This validation is completely customizable, but you need to create it all (or use a library). One of the most significant features of modern form controls is the ability to validate most user data without relying on JavaScript. This is done by using validation attributes on form elements.