Should I clear checkbox upon disable?

1. What does clear the checkbox mean?
2. How to uncheck a checkbox when another is checked in Javascript?

What does clear the checkbox mean?

a small box on a computer screen that you click on to show a choice, to open or close a file, etc.: To prevent a program from starting up, clear the check box next to it, click OK, and reboot.

How to uncheck a checkbox when another is checked in Javascript?

You can use the prop() method to check or uncheck a checkbox, such as on click of a button.