ion-radio

Radios should be used inside of an ion-radio-group. Pressing on a radio will check it. They can also be checked programmatically by setting the value property of the parent ion-radio-group to the value of the radio.

When radios are inside of a radio group, only one radio in the group will be checked at any time. Pressing a radio will check it and uncheck the previously selected radio, if there is one. If a radio is not in a group with another radio, then both radios will have the ability to be checked at the same time.

Usage

Angular

<ion-list>
  <ion-radio-group value="biff">
    <ion-list-header>
      <ion-label>Name</ion-label>
    </ion-list-header>

    <ion-item>
      <ion-label>Biff</ion-label>
      <ion-radio slot="start" value="biff"></ion-radio>
    </ion-item>

    <ion-item>
      <ion-label>Griff</ion-label>
      <ion-radio slot="start" value="griff"></ion-radio>
    </ion-item>

    <ion-item>
      <ion-label>Buford</ion-label>
      <ion-radio slot="start" value="buford"></ion-radio>
    </ion-item>
  </ion-radio-group>
</ion-list>

Javascript

<ion-list>
  <ion-radio-group value="biff">
    <ion-list-header>
      <ion-label>Name</ion-label>
    </ion-list-header>

    <ion-item>
      <ion-label>Biff</ion-label>
      <ion-radio slot="start" value="biff"></ion-radio>
    </ion-item>

    <ion-item>
      <ion-label>Griff</ion-label>
      <ion-radio slot="start" value="griff"></ion-radio>
    </ion-item>

    <ion-item>
      <ion-label>Buford</ion-label>
      <ion-radio slot="start" value="buford"></ion-radio>
    </ion-item>
  </ion-radio-group>
</ion-list>

React

import React, { useState } from 'react';
import {
  IonContent,
  IonHeader,
  IonPage,
  IonTitle,
  IonToolbar,
  IonList,
  IonRadioGroup,
  IonListHeader,
  IonLabel,
  IonItem,
  IonRadio,
  IonItemDivider,
} from '@ionic/react';

export const RadioExamples: React.FC = () => {
  const [selected, setSelected] = useState<string>('biff');
  return (
    <IonPage>
      <IonHeader>
        <IonToolbar>
          <IonTitle>Radio Examples</IonTitle>
        </IonToolbar>
      </IonHeader>
      <IonContent>
        <IonList>
          <IonRadioGroup value={selected} onIonChange={(e) => setSelected(e.detail.value)}>
            <IonListHeader>
              <IonLabel>Name</IonLabel>
            </IonListHeader>

            <IonItem>
              <IonLabel>Biff</IonLabel>
              <IonRadio slot="start" value="biff" />
            </IonItem>

            <IonItem>
              <IonLabel>Griff</IonLabel>
              <IonRadio slot="start" value="griff" />
            </IonItem>

            <IonItem>
              <IonLabel>Buford</IonLabel>
              <IonRadio slot="start" value="buford" />
            </IonItem>
          </IonRadioGroup>
          <IonItemDivider>Your Selection</IonItemDivider>
          <IonItem>{selected ?? '(none selected'}</IonItem>
        </IonList>
      </IonContent>
    </IonPage>
  );
};

Stencil

import { Component, h } from '@stencil/core';

@Component({
  tag: 'radio-example',
  styleUrl: 'radio-example.css',
})
export class RadioExample {
  render() {
    return [
      <ion-list>
        <ion-radio-group value="biff">
          <ion-list-header>
            <ion-label>Name</ion-label>
          </ion-list-header>

          <ion-item>
            <ion-label>Biff</ion-label>
            <ion-radio slot="start" value="biff"></ion-radio>
          </ion-item>

          <ion-item>
            <ion-label>Griff</ion-label>
            <ion-radio slot="start" value="griff"></ion-radio>
          </ion-item>

          <ion-item>
            <ion-label>Buford</ion-label>
            <ion-radio slot="start" value="buford"></ion-radio>
          </ion-item>
        </ion-radio-group>
      </ion-list>,
    ];
  }
}

Vue

<template>
  <ion-list>
    <ion-radio-group value="biff">
      <ion-list-header>
        <ion-label>Name</ion-label>
      </ion-list-header>

      <ion-item>
        <ion-label>Biff</ion-label>
        <ion-radio slot="start" value="biff"></ion-radio>
      </ion-item>

      <ion-item>
        <ion-label>Griff</ion-label>
        <ion-radio slot="start" value="griff"></ion-radio>
      </ion-item>

      <ion-item>
        <ion-label>Buford</ion-label>
        <ion-radio slot="start" value="buford"></ion-radio>
      </ion-item>
    </ion-radio-group>
  </ion-list>
</template>

<script>
  import { IonItem, IonLabel, IonList, IonListHeader, IonRadio, IonRadioGroup } from '@ionic/vue';
  import { defineComponent } from 'vue';

  export default defineComponent({
    components: {
      IonItem,
      IonLabel,
      IonList,
      IonListHeader,
      IonRadio,
      IonRadioGroup,
    },
  });
</script>

Properties

color

Description	The color to use from your application's color palette. Default options are: "primary", "secondary", "tertiary", "success", "warning", "danger", "light", "medium", and "dark". For more information on colors, see theming.
Attribute	color
Type	string \| undefined
Default	undefined

disabled

Description	If true, the user cannot interact with the radio.
Attribute	disabled
Type	boolean
Default	false

mode

Description	The mode determines which platform styles to use.
Attribute	mode
Type	"ios" \| "md"
Default	undefined

name

Description	The name of the control, which is submitted with the form data.
Attribute	name
Type	string
Default	this.inputId

value

Description	the value of the radio.
Attribute	value
Type	any
Default	undefined

Events

Name	Description
ionBlur	Emitted when the radio button loses focus.
ionFocus	Emitted when the radio button has focus.

CSS Shadow Parts

Name	Description
container	The container for the radio mark.
mark	The checkmark or dot used to indicate the checked state.

CSS Custom Properties

Name	Description
--border-radius	Border radius of the radio
--color	Color of the radio
--color-checked	Color of the checked radio
--inner-border-radius	Border radius of the inner checked radio