dijit/form/RadioButton

Authors:Becky Gibson, Doug Hays, Nikolai Onken Developers:?- since:V?

Contents

• dijit/form/RadioButton
  • Usage
  • Examples
  • Accessibility

RadioButton widgets capture binary user-choices unlike buttons which normally perform some action when clicked.

Usage

Normally, there are multiple RadioButton widgets assigned to a single group defined by widgets sharing the same name attribute. Upon FORM submission, the 1 checked RadioButton value is submitted using this shared name.

Examples

Programmatic and declarative example

Let’s create 2 RadioButton widgets, 1 programmatically and 1 declaratively. We’ll wrap both inside a FORM to illustrate what happens on submit.

require([
    "dojo/parser",
    "dijit/form/RadioButton",
    "dijit/form/Button", // used for example purpose
    "dojo/domReady!"
], function(parser, RadioButton){
    parser.parse();
    var radioOne = new RadioButton({
        checked: true,
        value: "tea",
        name: "drink",
    }, "radioOne").startup();
});

require([ "dojo/parser", "dijit/form/RadioButton", "dijit/form/Button", // used for example purpose "dojo/domReady!" ], function(parser, RadioButton){ parser.parse(); var radioOne = new RadioButton({ checked: true, value: "tea", name: "drink", }, "radioOne").startup(); });

<form id="myform">
    <input type="radio" name="drink" id="radioOne" checked value="tea"/> <label for="radioOne">Tea</label> <br />
    <input type="radio" data-dojo-type="dijit/form/RadioButton" name="drink" id="radioTwo" value="coffee"/> <label for="radioTwo">Coffee</label> <br />

    <button data-dojo-type="dijit/form/Button" type="button">
        Show form submit value
        <script type="dojo/on" data-dojo-event="click">
            require(["dojo/dom"], function(dom){
                 with(dom.byId('myform'))with(elements[0])with(elements[checked?0:1])alert(name+'='+value);
                 return false;
            });
        </script>
    </button>
</form>

<form id="myform"> <input type="radio" name="drink" id="radioOne" checked value="tea"/> <label for="radioOne">Tea</label> <br /> <input type="radio" data-dojo-type="dijit/form/RadioButton" name="drink" id="radioTwo" value="coffee"/> <label for="radioTwo">Coffee</label> <br /> <button data-dojo-type="dijit/form/Button" type="button"> Show form submit value <script type="dojo/on" data-dojo-event="click"> require(["dojo/dom"], function(dom){ with(dom.byId('myform'))with(elements[0])with(elements[checked?0:1])alert(name+'='+value); return false; }); </script> </button> </form>

Accessibility

Keyboard

Action	Key
Toggle checked state	Spacebar
Focus previous radio button	up or left arrow
Focus next radio button	down or right arrow

Note: Using the TAB key to focus a radio group will only focus the selected RadioButton in a group.

Radio buttons are implemented using the standard input type=checkbox and type=radio elements respectively. CSS is used to overlay the unique theme over the actual input elements. Thus, the keyboard behavior of checkboxes and radio buttons mimics the behavior in the browser.

Table of Contents

• dijit/form/RadioButton
  • Usage
  • Examples
    • Programmatic and declarative example
  • Accessibility
    • Keyboard