Booking.com uses a series of checkbox groups to help the user filter search criteria and find their ideal accommodation more efficiently. A checkbox (check box, tickbox, tick box) is a GUI widget that permits the user to make a binary choice, i.e. Additionally, there’s the single selection checkbox. With the hazard checkbox checked, if the current radio button is standard shipping, it is checked. First of all, let’s lay out our HTML. It also has two states, and when selected, the circle is filled with a solid dot. The :checked CSS pseudo-class selector represents any radio (), checkbox (), or option (