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10 changes: 10 additions & 0 deletions docs/api/radio.md
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Expand Up @@ -76,6 +76,16 @@ import EmptySelection from '@site/static/usage/v8/radio/empty-selection/index.md

<EmptySelection />

## Helper & Error Text

Helper and error text can be used inside of a radio group with the `helperText` and `errorText` property. The error text will not be displayed unless the `ion-invalid` and `ion-touched` classes are added to the `ion-radio-group`. This ensures errors are not shown before the user has a chance to enter data.

In Angular, this is done automatically through form validation. In JavaScript, React and Vue, the class needs to be manually added based on your own validation.

import HelperError from '@site/static/usage/v8/radio/helper-error/index.md';

<HelperError />


## Theming

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4 changes: 2 additions & 2 deletions static/code/stackblitz/v8/angular/package.json
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Expand Up @@ -15,8 +15,8 @@
"@angular/platform-browser": "^19.0.0",
"@angular/platform-browser-dynamic": "^19.0.0",
"@angular/router": "^19.0.0",
"@ionic/angular": "^8.0.0",
"@ionic/core": "^8.0.0",
"@ionic/angular": "8.4.4-dev.11741632207.1cb10db6",
"@ionic/core": "8.4.4-dev.11741632207.1cb10db6",
"ionicons": "7.4.0",
"rxjs": "^7.8.1",
"tslib": "^2.5.0",
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2 changes: 1 addition & 1 deletion static/code/stackblitz/v8/html/package.json
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@@ -1,6 +1,6 @@
{
"dependencies": {
"@ionic/core": "8.4.1",
"@ionic/core": "8.4.4-dev.11741632207.1cb10db6",
"ionicons": "7.4.0"
}
}
4 changes: 2 additions & 2 deletions static/code/stackblitz/v8/react/package.json
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Expand Up @@ -3,8 +3,8 @@
"version": "0.1.0",
"private": true,
"dependencies": {
"@ionic/react": "8.4.1",
"@ionic/react-router": "8.4.1",
"@ionic/react": "8.4.4-dev.11741632207.1cb10db6",
"@ionic/react-router": "8.4.4-dev.11741632207.1cb10db6",
"@types/node": "^22.0.0",
"@types/react": "^18.0.9",
"@types/react-dom": "^18.0.4",
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4 changes: 2 additions & 2 deletions static/code/stackblitz/v8/vue/package.json
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Expand Up @@ -8,8 +8,8 @@
"preview": "vite preview"
},
"dependencies": {
"@ionic/vue": "8.4.1",
"@ionic/vue-router": "8.4.1",
"@ionic/vue": "8.4.4-dev.11741632207.1cb10db6",
"@ionic/vue-router": "8.4.4-dev.11741632207.1cb10db6",
"vue": "^3.2.25",
"vue-router": "4.5.0"
},
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@@ -0,0 +1,18 @@
```html
<form [formGroup]="myForm" (ngSubmit)="onSubmit()">
<ion-radio-group
formControlName="favFruit"
helperText="Select your favorite fruit"
errorText="This field is required"
>
<ion-radio value="grapes">Grapes</ion-radio><br />
<ion-radio value="strawberries">Strawberries</ion-radio><br />
<ion-radio value="pineapple">Pineapple</ion-radio><br />
<ion-radio value="cherries">Cherries</ion-radio>
</ion-radio-group>

<br />

<ion-button type="submit" size="small">Submit</ion-button>
</form>
```
29 changes: 29 additions & 0 deletions static/usage/v8/radio/helper-error/angular/example_component_ts.md
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@@ -0,0 +1,29 @@
```ts
import { Component } from '@angular/core';
import { FormBuilder, FormGroup, Validators, ReactiveFormsModule } from '@angular/forms';
import { IonRadioGroup, IonRadio, IonButton } from '@ionic/angular/standalone';

@Component({
selector: 'app-example',
standalone: true,
imports: [IonRadioGroup, IonRadio, IonButton, ReactiveFormsModule],
templateUrl: './example.component.html',
styleUrl: './example.component.css',
})
export class ExampleComponent {
myForm: FormGroup;

constructor(private fb: FormBuilder) {
this.myForm = this.fb.group({
favFruit: ['', Validators.required],
});
}

onSubmit() {
// Mark the control as touched to trigger the error message.
// This is needed if the user submits the form without interacting
// with the toggle.
this.myForm.get('favFruit')!.markAsTouched();
}
}
```
61 changes: 61 additions & 0 deletions static/usage/v8/radio/helper-error/demo.html
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@@ -0,0 +1,61 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Input</title>
<link rel="stylesheet" href="../../common.css" />
<script src="../../common.js"></script>
<script
type="module"
src="https://cdn.jsdelivr.net/npm/@ionic/[email protected]/dist/ionic/ionic.esm.js"
></script>
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/@ionic/[email protected]/css/ionic.bundle.css"
/>
</head>

<body>
<div class="container">
<form id="my-form">
<ion-radio-group helper-text="Select your favorite fruit" error-text="This field is required">
<ion-radio value="grapes">Grapes</ion-radio><br />
<ion-radio value="strawberries">Strawberries</ion-radio><br />
<ion-radio value="pineapple">Pineapple</ion-radio><br />
<ion-radio value="cherries">Cherries</ion-radio>
</ion-radio-group>

<br />

<ion-button type="submit" size="small">Submit</ion-button>
</form>
</div>

<script>
const form = document.getElementById('my-form');
const favFruit = form.querySelector('ion-radio-group');

form.addEventListener('submit', (event) => submit(event));
favFruit.addEventListener('ionChange', (event) => validateRadioGroup(event));

const validateRadioGroup = (event) => {
favFruit.classList.add('ion-touched');

if (!event.detail.value) {
favFruit.classList.add('ion-invalid');
favFruit.classList.remove('ion-valid');
} else {
favFruit.classList.remove('ion-invalid');
favFruit.classList.add('ion-valid');
}
};

const submit = (event) => {
event.preventDefault();

validateRadioGroup({ detail: { value: favFruit.value } });
};
</script>
</body>
</html>
24 changes: 24 additions & 0 deletions static/usage/v8/radio/helper-error/index.md
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@@ -0,0 +1,24 @@
import Playground from '@site/src/components/global/Playground';

import javascript from './javascript.md';
import react from './react.md';
import vue from './vue.md';

import angular_example_component_html from './angular/example_component_html.md';
import angular_example_component_ts from './angular/example_component_ts.md';

<Playground
version="8"
code={{
javascript,
react,
vue,
angular: {
files: {
'src/app/example.component.html': angular_example_component_html,
'src/app/example.component.ts': angular_example_component_ts,
},
},
}}
src="usage/v8/radio/helper-error/demo.html"
/>
40 changes: 40 additions & 0 deletions static/usage/v8/radio/helper-error/javascript.md
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```html
<form id="my-form">
<ion-radio-group helper-text="Select your favorite fruit" error-text="This field is required">
<ion-radio value="grapes">Grapes</ion-radio><br />
<ion-radio value="strawberries">Strawberries</ion-radio><br />
<ion-radio value="pineapple">Pineapple</ion-radio><br />
<ion-radio value="cherries">Cherries</ion-radio>
</ion-radio-group>

<br />

<ion-button type="submit" size="small">Submit</ion-button>
</form>

<script>
const form = document.getElementById('my-form');
const favFruit = form.querySelector('ion-radio-group');

form.addEventListener('submit', (event) => submit(event));
favFruit.addEventListener('ionChange', (event) => validateRadioGroup(event));

const validateRadioGroup = (event) => {
favFruit.classList.add('ion-touched');

if (!event.detail.value) {
favFruit.classList.add('ion-invalid');
favFruit.classList.remove('ion-valid');
} else {
favFruit.classList.remove('ion-invalid');
favFruit.classList.add('ion-valid');
}
};

const submit = (event) => {
event.preventDefault();

validateRadioGroup({ detail: { value: favFruit.value } });
};
</script>
```
58 changes: 58 additions & 0 deletions static/usage/v8/radio/helper-error/react.md
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```tsx
import React, { useRef, useState } from 'react';
import { IonRadioGroup, IonRadio, IonButton, RadioGroupCustomEvent } from '@ionic/react';

function Example() {
const [isTouched, setIsTouched] = useState<boolean>(false);
const [isValid, setIsValid] = useState<boolean | undefined>();

const favFruitRef = useRef<HTMLIonRadioGroupElement>(null);

const validateRadioGroup = (event: RadioGroupCustomEvent<{ value: string }>) => {
setIsTouched(true);
setIsValid(event.detail.value ? true : false);
};

const submit = (event: React.FormEvent<HTMLFormElement>) => {
event.preventDefault();

if (favFruitRef.current) {
validateRadioGroup({ detail: { value: favFruitRef.current.value } } as RadioGroupCustomEvent<{
value: string;
}>);
}
};

return (
<>
<form onSubmit={submit}>
<IonRadioGroup
ref={favFruitRef}
className={`${isValid ? 'ion-valid' : ''} ${isValid === false ? 'ion-invalid' : ''} ${
isTouched ? 'ion-touched' : ''
}`}
helperText="Select your favorite fruit"
errorText="This field is required"
onIonChange={(event) => validateRadioGroup(event)}
>
<IonRadio value="grapes">Grapes</IonRadio>
<br />
<IonRadio value="strawberries">Strawberries</IonRadio>
<br />
<IonRadio value="pineapple">Pineapple</IonRadio>
<br />
<IonRadio value="cherries">Cherries</IonRadio>
</IonRadioGroup>

<br />

<IonButton type="submit" size="small">
Submit
</IonButton>
</form>
</>
);
}

export default Example;
```
57 changes: 57 additions & 0 deletions static/usage/v8/radio/helper-error/vue.md
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```html
<template>
<form @submit.prevent="submit">
<ion-radio-group
v-model="favFruit"
helper-text="Select your favorite fruit"
error-text="This field is required"
@ionChange="validateRadioGroup"
:class="{ 'ion-valid': isValid, 'ion-invalid': isValid === false, 'ion-touched': isTouched }"
>
<ion-radio value="grapes">Grapes</ion-radio><br />
<ion-radio value="strawberries">Strawberries</ion-radio><br />
<ion-radio value="pineapple">Pineapple</ion-radio><br />
<ion-radio value="cherries">Cherries</ion-radio>
</ion-radio-group>

<br />

<ion-button type="submit" size="small">Submit</ion-button>
</form>
</template>

<script lang="ts">
import { defineComponent, ref } from 'vue';
import { IonRadioGroup, IonRadio, IonButton, RadioGroupCustomEvent } from '@ionic/vue';

export default defineComponent({
components: {
IonRadioGroup,
IonRadio,
IonButton,
},
setup() {
const favFruit = ref('');
const isTouched = ref(false);
const isValid = ref<boolean | undefined>();

const validateRadioGroup = (event: RadioGroupCustomEvent<{ value: string }>) => {
isTouched.value = true;
isValid.value = event.detail.value ? true : false;
};

const submit = () => {
validateRadioGroup({ detail: { value: favFruit.value } } as RadioGroupCustomEvent<{ value: string }>);
};

return {
favFruit,
isTouched,
isValid,
validateRadioGroup,
submit,
};
},
});
</script>
```