Adds an event handler that runs when the key is released within an input.
A dashboard number input element receives a keyRelease event when a user
releases a key on the keyboard while the cursor is inside the input element.
A keyRelease event is fired for printable and non-printable characters.
Notes:
Some browsers do not issue a key release event for certain keys, such as arrow keys or the shift key.
When you retrieve the value from the target property of a KeyboardEvent,
you get the value of the target element before the key was released.
handler(event: KeyboardEvent): void The name of the function or
the function expression to run when the element is clicked.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.