Does confirmation dialog need a close ('X') button?

1. Should a modal have a close button?
2. Are the close button and X on a popup redundant?
3. How to show confirm dialog box in JavaScript?
4. What is the difference between cancel and close button?

Should a modal have a close button?

Closing the modal: Always provide a clear close option for users by using a button or an 'x' icon at the top right of the modal.

Are the close button and X on a popup redundant?

Yes, they're redundant.

How to show confirm dialog box in JavaScript?

The confirm() method is used to display a dialog box with an optional message and two buttons, OK and Cancel. It returns true if the user clicks “OK”, and false otherwise. It prevents the user from accessing other parts of the page until the box is closed.

What is the difference between cancel and close button?

Presenting two distinct buttons: X for closing the view (with the side effect of saving intermediate work) and Cancel for abandoning the process.