![]() Notice also how the :checked pseudo-class is used to specify the styles for the radio button's appearance when selected. ![]() Here we've used a border along with border-radius and a transition to create a nice animating radio selection. By specifying appearance: none, you can remove the native styling altogether, and create your own styles for them. By default, radio buttons (and checkboxes) are styled with the operating system's native styles for those controls. Most notable here is the use of the appearance property (with prefixes needed to support some browsers). ![]() when submit button is pressed and no radio buttons have been selected, it alerts the user saying 'please select a check box', and if a radio button has been selected then simply submit the form, needs no alert. If any radio button in a same-named group of radio buttons has the required attribute, a radio button in that group must be checked, although it doesn't have to be the one with the attribute applied. Need to validate a radio button input, i.e. The required attribute is one which most s share. This is demonstrated in the section Value above. If the value is not otherwise specified, it is the string on by default. The value attribute is one which all s share however, it serves a special purpose for inputs of type radio: when a form is submitted, only radio buttons which are currently checked are submitted to the server, and the reported value is the value of the value attribute. Use the autocomplete attribute to control this feature. Unlike other browsers, Firefox by default persists the dynamic checked state of an across page loads. checkedĪ Boolean attribute which, if present, indicates that this radio button is the default selected one in the group. In addition to the common attributes shared by all elements, radio inputs support the following attributes.
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