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A radio button or option button [citation needed] is a graphical control element that allows the user to choose only one of a predefined set of mutually exclusive options. [1] The singular property of a radio button makes it distinct from checkboxes , where the user can select and unselect any number of items.
Setting or clearing ("unclicking") a checkbox changes the checkbox's state with no other side-effects.Violating this guideline by associating additional actions with the change of state frequently confuses users, because they are used to configuring data in entry controls such as text boxes, radio buttons, and checkboxes and then invoking an action control such as a push button to initiate the ...
<radio> — a radio button <file> — a file select control for uploading a file <reset> — a reset button that, when activated, tells the browser to restore the values of the current form, to their initial values. <submit> — a button that tells the browser to take action on the form (typically to send it to a server)
Radio buttons are similar in appearance and behaviour except that they are circular and contain a dot instead of a check. Radio buttons are classed into groups of which only one can be activated at a time. In Yosemite, a short animation was added to show the checkbox or radio button filling in.
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Testing checkboxes and radio buttons. ticked checkbox unticked checkbox Yes checkbox colored black No checkbox colored white radio button on radio button off This ...
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The two frames below have titles, and a radio button outside them, presumably to select one or the other. The lower of the two boxes is dimmed, or disabled, indicating its widgets cannot be selected. Each of the frames (as well as the area outside of the frames) has a checked radio button, while normally only one of the buttons can be selected.