You can set a checkbox or radio button to be checked by default using the checked attribute.

You can use radio buttons for questions where you want the user to only give you one answer out of multiple options. Radio buttons are a type of input. Each of your radio buttons can be nested within ...

It’s a common scene: a dedicated radio amateur wakes up early in the morning, ambles over to their shack, and sits in the glow of vacuum tubes as they call CQ DX, trying to contact hams in time zones ...