ion-select
Contents
Selectは、ネイティブの<select>
要素と同様に、オプションのセットからオプションを選択するためのフォームコントロールです。ユーザがselectをタップすると、すべてのオプションを含むダイアログが、選択しやすい大きなリストで表示されます。
selectは、子要素<ion-select-option>
とともに使用する必要があります。子要素のオプションにvalue
属性が指定されていない場合、そのtextが値として使用されます。
value
が<ion-select>
にセットされている場合、オプションはその値に基づいて選択済みになります。
インターフェイス
デフォルトでは、select は ion-alert を使ってAlertのオプションのオーバーレイを開きます。インターフェイスを変更して、ion-action-sheet または ion-popover を使用するには、action-sheet
またはpopover
をinterface
プロパティに渡します。各インタフェースの制限については、他のセクションを参照してください。
単一選択
デフォルトでは、selectを使用すると、ユーザは1つのOptionだけを選択できます。Alertのインターフェースでは、Optionのリストがradio button形式で表示されます。action sheetインタフェースは、1つの値選択でのみ使用できます。selectコンポーネントの値は、選択したオプションの値の値を受け取ります。
複数選択
multiple
属性を追加して選択すると、複数のOptionを選択できます。複数のOptionを選択できる場合は、checkbox形式のオプションのリストがAlertオーバーレイで表示されます。selectコンポーネントの値は、選択されたすべてのオプション値の配列を受け取ります。
Note: action-sheet
と popover
インターフェイスでは、複数選択は動作しません
Object値について
選択した値にObjectを使用する場合、これらのObjectの識別情報がサーバーまたはデータベースからのものであれば変更できますが、選択した値の識別情報は変更されません。たとえば、目的のObject値を持つ既存の値がselectにロードされたが、新しく取得されたselectオプションが異なるIDを持つようになった場合などです。これにより、元の選択がそのままの状態であっても、選択に値がまったく表示されなくなります。
デフォルトでは、selectはObjectの等価性(===
)を使用して、オプションが選択されているかどうかを判断します。これはcompareWiths
プロパティにプロパティ名または関数を指定することで上書きできます。
SelectのButton
alertはふたつのボタンをサポートしています: Cancel
と OK
です。それぞれのボタンは、 cancelText
と okText
プロパティを使ってカスタマイズできます。
action-sheet
と popover
インタフェースには OK
ボタンがありません。いずれかのオプションをクリックすると、自動的にオーバーレイが閉じ、その値が選択されます。popover
インターフェースにはCancel
ボタンがないので、backdropをクリックするとオーバーレイが閉じます。
インターフェイスオプション
Since select uses the alert, action sheet and popover interfaces, options can be passed to these components through the interfaceOptions
property. This can be used to pass a custom header, subheader, css class, and more.
See the ion-alert docs, ion-action-sheet docs, and ion-popover docs for the properties that each interface accepts.
Note: interfaceOptions
will not override inputs
or buttons
with the alert
interface.
Customization
There are two units that make up the Select component and each need to be styled separately. The ion-select
element is represented on the view by the selected value(s), or placeholder if there is none, and dropdown icon. The interface, which is defined in the Interfaces section above, is the dialog that opens when clicking on the ion-select
. The interface contains all of the options defined by adding ion-select-option
elements. The following sections will go over the differences between styling these.
Styling Select Element
As mentioned, the ion-select
element consists only of the value(s), or placeholder, and icon that is displayed on the view. To customize this, style using a combination of CSS and any of the CSS custom properties:
ion-select {
/* Applies to the value and placeholder color */
color: #545ca7;
/* Set a different placeholder color */
--placeholder-color: #971e49;
/* Set full opacity on the placeholder */
--placeholder-opacity: 1;
}
Alternatively, depending on the browser support needed, CSS shadow parts can be used to style the select:
/* Set the width to the full container and center the content */
ion-select {
width: 100%;
justify-content: center;
}
/* Set the flex in order to size the text width to its content */
ion-select::part(placeholder),
ion-select::part(text) {
flex: 0 0 auto;
}
/* Set the placeholder color and opacity */
ion-select::part(placeholder) {
color: #20a08a;
opacity: 1;
}
/*
* Set the font of the first letter of the placeholder
* Shadow parts work with pseudo-elements, too!
* https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-elements
*/
ion-select::part(placeholder)::first-letter {
font-size: 24px;
font-weight: 500;
}
/* Set the text color */
ion-select::part(text) {
color: #545ca7;
}
/* Set the icon color and opacity */
ion-select::part(icon) {
color: #971e49;
opacity: 1;
}
Notice that by using ::part
, any CSS property on the element can be targeted.
Styling Select Interface
Customizing the interface dialog should be done by following the Customization section in that interface's documentation:
However, the Select Option does set a class for easier styling and allows for the ability to pass a class to the overlay option, see the Select Options documentation for usage examples of customizing options.
Interfaces
SelectChangeEventDetail
interface SelectChangeEventDetail<T = any> {
value: T;
}
SelectCustomEvent
While not required, this interface can be used in place of the CustomEvent
interface for stronger typing with Ionic events emitted from this component.
interface SelectCustomEvent<T = any> extends CustomEvent {
detail: SelectChangeEventDetail<T>;
target: HTMLIonSelectElement;
}
Usage
- Angular
- Javascript
- React
- Stencil
- Vue
Single Selection
<ion-list>
<ion-list-header>
<ion-label>
Single Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Gender</ion-label>
<ion-select placeholder="Select One">
<ion-select-option value="f">Female</ion-select-option>
<ion-select-option value="m">Male</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Hair Color</ion-label>
<ion-select value="brown" okText="Okay" cancelText="Dismiss">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
Multiple Selection
<ion-list>
<ion-list-header>
<ion-label>
Multiple Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Toppings</ion-label>
<ion-select multiple="true" cancelText="Nah" okText="Okay!">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Pets</ion-label>
<ion-select multiple="true" [value]="['bird', 'dog']">
<ion-select-option value="bird">Bird</ion-select-option>
<ion-select-option value="cat">Cat</ion-select-option>
<ion-select-option value="dog">Dog</ion-select-option>
<ion-select-option value="honeybadger">Honey Badger</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
Objects as Values
<ion-list>
<ion-list-header>
<ion-label>
Objects as Values (compareWith)
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Users</ion-label>
<ion-select [compareWith]="compareWith">
<ion-select-option *ngFor="let user of users" [value]="user">{{user.first + ' ' + user.last}}</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
import { Component } from '@angular/core';
interface User {
id: number;
first: string;
last: string;
}
@Component({
selector: 'select-example',
templateUrl: 'select-example.html',
styleUrls: ['./select-example.css'],
})
export class SelectExample {
users: User[] = [
{
id: 1,
first: 'Alice',
last: 'Smith',
},
{
id: 2,
first: 'Bob',
last: 'Davis',
},
{
id: 3,
first: 'Charlie',
last: 'Rosenburg',
}
];
compareWith(o1: User, o2: User) {
return o1 && o2 ? o1.id === o2.id : o1 === o2;
}
}
Objects as Values with Multiple Selection
<ion-list>
<ion-list-header>
<ion-label>
Objects as Values (compareWith)
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Users</ion-label>
<ion-select [compareWith]="compareWith" multiple="true">
<ion-select-option *ngFor="let user of users" [value]="user">{{user.first + ' ' + user.last}}</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
import { Component } from '@angular/core';
interface User {
id: number;
first: string;
last: string;
}
@Component({
selector: 'select-example',
templateUrl: 'select-example.html',
styleUrls: ['./select-example.css'],
})
export class SelectExample {
users: User[] = [
{
id: 1,
first: 'Alice',
last: 'Smith',
},
{
id: 2,
first: 'Bob',
last: 'Davis',
},
{
id: 3,
first: 'Charlie',
last: 'Rosenburg',
}
];
compareWith(o1: User, o2: User | User[]) {
if (!o1 || !o2) {
return o1 === o2;
}
if (Array.isArray(o2)) {
return o2.some((u: User) => u.id === o1.id);
}
return o1.id === o2.id;
}
}
Interface Options
<ion-list>
<ion-list-header>
<ion-label>
Interface Options
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Alert</ion-label>
<ion-select [interfaceOptions]="customAlertOptions" interface="alert" multiple="true" placeholder="Select One">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Popover</ion-label>
<ion-select [interfaceOptions]="customPopoverOptions" interface="popover" placeholder="Select One">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Action Sheet</ion-label>
<ion-select [interfaceOptions]="customActionSheetOptions" interface="action-sheet" placeholder="Select One">
<ion-select-option value="red">Red</ion-select-option>
<ion-select-option value="purple">Purple</ion-select-option>
<ion-select-option value="yellow">Yellow</ion-select-option>
<ion-select-option value="orange">Orange</ion-select-option>
<ion-select-option value="green">Green</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
import { Component } from '@angular/core';
@Component({
selector: 'select-example',
templateUrl: 'select-example.html',
styleUrls: ['./select-example.css'],
})
export class SelectExample {
customAlertOptions: any = {
header: 'Pizza Toppings',
subHeader: 'Select your toppings',
message: '$1.00 per topping',
translucent: true
};
customPopoverOptions: any = {
header: 'Hair Color',
subHeader: 'Select your hair color',
message: 'Only select your dominant hair color'
};
customActionSheetOptions: any = {
header: 'Colors',
subHeader: 'Select your favorite color'
};
}
Single Selection
<ion-list>
<ion-list-header>
<ion-label>
Single Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Gender</ion-label>
<ion-select placeholder="Select One">
<ion-select-option value="f">Female</ion-select-option>
<ion-select-option value="m">Male</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Hair Color</ion-label>
<ion-select value="brown" ok-text="Okay" cancel-text="Dismiss">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
Multiple Selection
<ion-list>
<ion-list-header>
<ion-label>
Multiple Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Toppings</ion-label>
<ion-select multiple="true" cancel-text="Nah" ok-text="Okay!">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Pets</ion-label>
<ion-select id="multiple" multiple="true">
<ion-select-option value="bird">Bird</ion-select-option>
<ion-select-option value="cat">Cat</ion-select-option>
<ion-select-option value="dog">Dog</ion-select-option>
<ion-select-option value="honeybadger">Honey Badger</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
const select = document.querySelector('multiple');
select.value = ['bird', 'dog'];
Objects as Values
<ion-list>
<ion-list-header>
<ion-label>
Objects as Values (compareWith)
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Users</ion-label>
<ion-select id="objectSelectCompareWith"></ion-select>
</ion-item>
</ion-list>
let objectOptions = [
{
id: 1,
first: 'Alice',
last: 'Smith',
},
{
id: 2,
first: 'Bob',
last: 'Davis',
},
{
id: 3,
first: 'Charlie',
last: 'Rosenburg',
}
];
let compareWithFn = (o1, o2) => {
return o1 && o2 ? o1.id === o2.id : o1 === o2;
};
let objectSelectElement = document.getElementById('objectSelectCompareWith');
objectSelectElement.compareWith = compareWithFn;
objectOptions.forEach((option, i) => {
let selectOption = document.createElement('ion-select-option');
selectOption.value = option;
selectOption.textContent = option.first + ' ' + option.last;
objectSelectElement.appendChild(selectOption)
});
objectSelectElement.value = objectOptions[0];
}
Interface Options
<ion-list>
<ion-list-header>
<ion-label>
Interface Options
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Alert</ion-label>
<ion-select id="customAlertSelect" interface="alert" multiple="true" placeholder="Select One">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Popover</ion-label>
<ion-select id="customPopoverSelect" interface="popover" placeholder="Select One">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Action Sheet</ion-label>
<ion-select id="customActionSheetSelect" interface="action-sheet" placeholder="Select One">
<ion-select-option value="red">Red</ion-select-option>
<ion-select-option value="purple">Purple</ion-select-option>
<ion-select-option value="yellow">Yellow</ion-select-option>
<ion-select-option value="orange">Orange</ion-select-option>
<ion-select-option value="green">Green</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
var customAlertSelect = document.getElementById('customAlertSelect');
var customAlertOptions = {
header: 'Pizza Toppings',
subHeader: 'Select your toppings',
message: '$1.00 per topping',
translucent: true
};
customAlertSelect.interfaceOptions = customAlertOptions;
var customPopoverSelect = document.getElementById('customPopoverSelect');
var customPopoverOptions = {
header: 'Hair Color',
subHeader: 'Select your hair color',
message: 'Only select your dominant hair color'
};
customPopoverSelect.interfaceOptions = customPopoverOptions;
var customActionSheetSelect = document.getElementById('customActionSheetSelect');
var customActionSheetOptions = {
header: 'Colors',
subHeader: 'Select your favorite color'
};
customActionSheetSelect.interfaceOptions = customActionSheetOptions;
Single Selection
import React, { useState } from 'react';
import { IonContent, IonItem, IonLabel, IonList, IonListHeader, IonSelect, IonSelectOption, IonPage, IonItemDivider } from '@ionic/react';
export const SingleSelection: React.FC = () => {
const [gender, setGender] = useState<string>();
const [hairColor, setHairColor] = useState<string>('brown');
return (
<IonPage>
<IonContent>
<IonList>
<IonListHeader>
<IonLabel>
Single Selection
</IonLabel>
</IonListHeader>
<IonItem>
<IonLabel>Gender</IonLabel>
<IonSelect value={gender} placeholder="Select One" onIonChange={e => setGender(e.detail.value)}>
<IonSelectOption value="female">Female</IonSelectOption>
<IonSelectOption value="male">Male</IonSelectOption>
</IonSelect>
</IonItem>
<IonItem>
<IonLabel>Hair Color</IonLabel>
<IonSelect value={hairColor} okText="Okay" cancelText="Dismiss" onIonChange={e => setHairColor(e.detail.value)}>
<IonSelectOption value="brown">Brown</IonSelectOption>
<IonSelectOption value="blonde">Blonde</IonSelectOption>
<IonSelectOption value="black">Black</IonSelectOption>
<IonSelectOption value="red">Red</IonSelectOption>
</IonSelect>
</IonItem>
<IonItemDivider>Your Selections</IonItemDivider>
<IonItem>Gender: {gender ?? '(none selected)'}</IonItem>
<IonItem>Hair Color: {hairColor}</IonItem>
</IonList>
</IonContent>
</IonPage>
);
};
Multiple Selection
import React, { useState } from 'react';
import { IonContent, IonItem, IonLabel, IonList, IonListHeader, IonSelect, IonSelectOption, IonPage, IonItemDivider } from '@ionic/react';
export const MultipleSelection: React.FC = () => {
const [toppings, setToppings] = useState<string[]>([]);
const [pets, setPets] = useState<string[]>(['bird', 'dog']);
return (
<IonPage>
<IonContent>
<IonList>
<IonListHeader>
<IonLabel>
Multiple Selection
</IonLabel>
</IonListHeader>
<IonItem>
<IonLabel>Toppings</IonLabel>
<IonSelect value={toppings} multiple={true} cancelText="Nah" okText="Okay!" onIonChange={e => setToppings(e.detail.value)}>
<IonSelectOption value="bacon">Bacon</IonSelectOption>
<IonSelectOption value="olives">Black Olives</IonSelectOption>
<IonSelectOption value="xcheese">Extra Cheese</IonSelectOption>
<IonSelectOption value="peppers">Green Peppers</IonSelectOption>
<IonSelectOption value="mushrooms">Mushrooms</IonSelectOption>
<IonSelectOption value="onions">Onions</IonSelectOption>
<IonSelectOption value="pepperoni">Pepperoni</IonSelectOption>
<IonSelectOption value="pineapple">Pineapple</IonSelectOption>
<IonSelectOption value="sausage">Sausage</IonSelectOption>
<IonSelectOption value="Spinach">Spinach</IonSelectOption>
</IonSelect>
</IonItem>
<IonItem>
<IonLabel>Pets</IonLabel>
<IonSelect multiple={true} value={pets} onIonChange={e => setPets(e.detail.value)}>
<IonSelectOption value="bird">Bird</IonSelectOption>
<IonSelectOption value="cat">Cat</IonSelectOption>
<IonSelectOption value="dog">Dog</IonSelectOption>
<IonSelectOption value="honeybadger">Honey Badger</IonSelectOption>
</IonSelect>
</IonItem>
<IonItemDivider>Your Selections</IonItemDivider>
<IonItem>Toppings: {toppings.length ? toppings.reduce((curr, prev) => prev + ', ' + curr, '') : '(none selected)'}</IonItem>
<IonItem>Pets: {pets.length ? pets.reduce((curr, prev) => prev + ', ' + curr, '') : '(none selected)'}</IonItem>
</IonList>
</IonContent>
</IonPage>
);
};
Objects as Values
import React, { useState } from 'react';
import { IonContent, IonItem, IonLabel, IonList, IonListHeader, IonSelect, IonSelectOption, IonPage, IonItemDivider } from '@ionic/react';
const users = [
{
id: 1,
first: 'Alice',
last: 'Smith'
},
{
id: 2,
first: 'Bob',
last: 'Davis'
},
{
id: 3,
first: 'Charlie',
last: 'Rosenburg',
}
];
type User = typeof users[number];
const compareWith = (o1: User, o2: User) => {
return o1 && o2 ? o1.id === o2.id : o1 === o2;
};
export const ObjectSelection: React.FC = () => {
const [selectedUsers, setSelectedUsers] = useState<User[]>([]);
return (
<IonPage>
<IonContent>
<IonList>
<IonListHeader>
<IonLabel>
Objects as Values (compareWith)
</IonLabel>
</IonListHeader>
<IonItem>
<IonLabel>Users</IonLabel>
<IonSelect compareWith={compareWith} value={selectedUsers} multiple onIonChange={e => setSelectedUsers(e.detail.value)}>
{users.map(user => (
<IonSelectOption key={user.id} value={user}>
{user.first} {user.last}
</IonSelectOption>
))}
</IonSelect>
</IonItem>
<IonItemDivider>Selected Users</IonItemDivider>
{selectedUsers.length ?
selectedUsers.map(user => <IonItem key={user.id}>{user.first} {user.last}</IonItem>) :
<IonItem>(none selected)</IonItem>
}
</IonList>
</IonContent>
</IonPage>
);
};
Interface Options
import React, { useState } from 'react';
import { IonContent, IonItem, IonLabel, IonList, IonListHeader, IonSelect, IonSelectOption, IonPage, IonItemDivider } from '@ionic/react';
const customAlertOptions = {
header: 'Pizza Toppings',
subHeader: 'Select your toppings',
message: '$1.00 per topping',
translucent: true
};
const customPopoverOptions = {
header: 'Hair Color',
subHeader: 'Select your hair color',
message: 'Only select your dominant hair color'
};
const customActionSheetOptions = {
header: 'Colors',
subHeader: 'Select your favorite color'
};
export const InterfaceOptionsSelection: React.FC = () => {
const [toppings, setToppings] = useState<string[]>([]);
const [hairColor, setHairColor] = useState<string>('brown');
const [color, setColor] = useState<string>();
return (
<IonPage>
<IonContent>
<IonList>
<IonListHeader>
<IonLabel>
Interface Options
</IonLabel>
</IonListHeader>
<IonItem>
<IonLabel>Alert</IonLabel>
<IonSelect
interfaceOptions={customAlertOptions}
interface="alert"
multiple={true}
placeholder="Select One"
onIonChange={e => setToppings(e.detail.value)}
value={toppings}
>
<IonSelectOption value="bacon">Bacon</IonSelectOption>
<IonSelectOption value="olives">Black Olives</IonSelectOption>
<IonSelectOption value="xcheese">Extra Cheese</IonSelectOption>
<IonSelectOption value="peppers">Green Peppers</IonSelectOption>
<IonSelectOption value="mushrooms">Mushrooms</IonSelectOption>
<IonSelectOption value="onions">Onions</IonSelectOption>
<IonSelectOption value="pepperoni">Pepperoni</IonSelectOption>
<IonSelectOption value="pineapple">Pineapple</IonSelectOption>
<IonSelectOption value="sausage">Sausage</IonSelectOption>
<IonSelectOption value="Spinach">Spinach</IonSelectOption>
</IonSelect>
</IonItem>
<IonItem>
<IonLabel>Popover</IonLabel>
<IonSelect
interfaceOptions={customPopoverOptions}
interface="popover"
placeholder="Select One"
onIonChange={e => setHairColor(e.detail.value)}
value={hairColor}>
<IonSelectOption value="brown">Brown</IonSelectOption>
<IonSelectOption value="blonde">Blonde</IonSelectOption>
<IonSelectOption value="black">Black</IonSelectOption>
<IonSelectOption value="red">Red</IonSelectOption>
</IonSelect>
</IonItem>
<IonItem>
<IonLabel>Action Sheet</IonLabel>
<IonSelect
interfaceOptions={customActionSheetOptions}
interface="action-sheet"
placeholder="Select One"
onIonChange={e => setColor(e.detail.value)}
value={color}
>
<IonSelectOption value="red">Red</IonSelectOption>
<IonSelectOption value="purple">Purple</IonSelectOption>
<IonSelectOption value="yellow">Yellow</IonSelectOption>
<IonSelectOption value="orange">Orange</IonSelectOption>
<IonSelectOption value="green">Green</IonSelectOption>
</IonSelect>
</IonItem>
<IonItemDivider>Your Selections</IonItemDivider>
<IonItem>Toppings: {toppings.length ? toppings.reduce((curr, prev) => prev + ', ' + curr, '') : '(none selected)'}</IonItem>
<IonItem>Hair Color: {hairColor}</IonItem>
<IonItem>Color: {color ?? '(none selected)'}</IonItem>
</IonList>
</IonContent>
</IonPage>
);
};
Single Selection
import { Component, h } from '@stencil/core';
@Component({
tag: 'select-example',
styleUrl: 'select-example.css'
})
export class SelectExample {
render() {
return [
<ion-list>
<ion-list-header>
<ion-label>
Single Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Gender</ion-label>
<ion-select placeholder="Select One">
<ion-select-option value="f">Female</ion-select-option>
<ion-select-option value="m">Male</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Hair Color</ion-label>
<ion-select value="brown" okText="Okay" cancelText="Dismiss">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
];
}
}
Multiple Selection
import { Component, h } from '@stencil/core';
@Component({
tag: 'select-example',
styleUrl: 'select-example.css'
})
export class SelectExample {
render() {
return [
<ion-list>
<ion-list-header>
<ion-label>
Multiple Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Toppings</ion-label>
<ion-select multiple={true} cancelText="Nah" okText="Okay!">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Pets</ion-label>
<ion-select multiple={true} value={['bird', 'dog']}>
<ion-select-option value="bird">Bird</ion-select-option>
<ion-select-option value="cat">Cat</ion-select-option>
<ion-select-option value="dog">Dog</ion-select-option>
<ion-select-option value="honeybadger">Honey Badger</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
];
}
}
Objects as Values
import { Component, h } from '@stencil/core';
@Component({
tag: 'select-example',
styleUrl: 'select-example.css'
})
export class SelectExample {
private users: any[] = [
{
id: 1,
first: 'Alice',
last: 'Smith',
},
{
id: 2,
first: 'Bob',
last: 'Davis',
},
{
id: 3,
first: 'Charlie',
last: 'Rosenburg',
}
];
compareWith = (o1, o2) => {
return o1 && o2 ? o1.id === o2.id : o1 === o2;
};
render() {
return [
<ion-list>
<ion-list-header>
<ion-label>
Objects as Values (compareWith)
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Users</ion-label>
<ion-select compareWith={this.compareWith}>
{this.users.map(user =>
<ion-select-option value={user}>
{user.first + ' ' + user.last}
</ion-select-option>
)}
</ion-select>
</ion-item>
</ion-list>
];
}
}
Interface Options
import { Component, h } from '@stencil/core';
@Component({
tag: 'select-example',
styleUrl: 'select-example.css'
})
export class SelectExample {
private customAlertOptions: any = {
header: 'Pizza Toppings',
subHeader: 'Select your toppings',
message: '$1.00 per topping',
translucent: true
};
private customPopoverOptions: any = {
header: 'Hair Color',
subHeader: 'Select your hair color',
message: 'Only select your dominant hair color'
};
private customActionSheetOptions: any = {
header: 'Colors',
subHeader: 'Select your favorite color'
};
render() {
return [
<ion-list>
<ion-list-header>
<ion-label>
Interface Options
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Alert</ion-label>
<ion-select interfaceOptions={this.customAlertOptions} interface="alert" multiple={true} placeholder="Select One">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Popover</ion-label>
<ion-select interfaceOptions={this.customPopoverOptions} interface="popover" placeholder="Select One">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Action Sheet</ion-label>
<ion-select interfaceOptions={this.customActionSheetOptions} interface="action-sheet" placeholder="Select One">
<ion-select-option value="red">Red</ion-select-option>
<ion-select-option value="purple">Purple</ion-select-option>
<ion-select-option value="yellow">Yellow</ion-select-option>
<ion-select-option value="orange">Orange</ion-select-option>
<ion-select-option value="green">Green</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
];
}
}
Single Selection
<template>
<ion-list>
<ion-list-header>
<ion-label>
Single Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Gender</ion-label>
<ion-select placeholder="Select One">
<ion-select-option value="f">Female</ion-select-option>
<ion-select-option value="m">Male</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Hair Color</ion-label>
<ion-select value="brown" ok-text="Okay" cancel-text="Dismiss">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
</template>
<script>
import {
IonItem,
IonLabel,
IonList,
IonListHeader,
IonSelect,
IonSelectOption
} from '@ionic/vue';
import { defineComponent } from 'vue';
export default defineComponent({
components: {
IonItem,
IonLabel,
IonList,
IonListHeader,
IonSelect,
IonSelectOption
}
});
</script>
Multiple Selection
<template>
<ion-list>
<ion-list-header>
<ion-label>
Multiple Selection
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Toppings</ion-label>
<ion-select multiple="true" cancel-text="Nah" ok-text="Okay!">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Pets</ion-label>
<ion-select multiple="true" :value=['bird', 'dog']>
<ion-select-option value="bird">Bird</ion-select-option>
<ion-select-option value="cat">Cat</ion-select-option>
<ion-select-option value="dog">Dog</ion-select-option>
<ion-select-option value="honeybadger">Honey Badger</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
</template>
<script>
import {
IonItem,
IonLabel,
IonList,
IonListHeader,
IonSelect,
IonSelectOption
} from '@ionic/vue';
import { defineComponent } from 'vue';
export default defineComponent({
components: {
IonItem,
IonLabel,
IonList,
IonListHeader,
IonSelect,
IonSelectOption
}
});
</script>
Interface Options
<template>
<ion-list>
<ion-list-header>
<ion-label>
Interface Options
</ion-label>
</ion-list-header>
<ion-item>
<ion-label>Alert</ion-label>
<ion-select :interface-options="customAlertOptions" interface="alert" multiple="true" placeholder="Select One">
<ion-select-option value="bacon">Bacon</ion-select-option>
<ion-select-option value="olives">Black Olives</ion-select-option>
<ion-select-option value="xcheese">Extra Cheese</ion-select-option>
<ion-select-option value="peppers">Green Peppers</ion-select-option>
<ion-select-option value="mushrooms">Mushrooms</ion-select-option>
<ion-select-option value="onions">Onions</ion-select-option>
<ion-select-option value="pepperoni">Pepperoni</ion-select-option>
<ion-select-option value="pineapple">Pineapple</ion-select-option>
<ion-select-option value="sausage">Sausage</ion-select-option>
<ion-select-option value="Spinach">Spinach</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Popover</ion-label>
<ion-select :interface-options="customPopoverOptions" interface="popover" placeholder="Select One">
<ion-select-option value="brown">Brown</ion-select-option>
<ion-select-option value="blonde">Blonde</ion-select-option>
<ion-select-option value="black">Black</ion-select-option>
<ion-select-option value="red">Red</ion-select-option>
</ion-select>
</ion-item>
<ion-item>
<ion-label>Action Sheet</ion-label>
<ion-select :interface-options="customActionSheetOptions" interface="action-sheet" placeholder="Select One">
<ion-select-option value="red">Red</ion-select-option>
<ion-select-option value="purple">Purple</ion-select-option>
<ion-select-option value="yellow">Yellow</ion-select-option>
<ion-select-option value="orange">Orange</ion-select-option>
<ion-select-option value="green">Green</ion-select-option>
</ion-select>
</ion-item>
</ion-list>
</template>
<script>
import {
IonItem,
IonLabel,
IonList,
IonListHeader,
IonSelect,
IonSelectOption
} from '@ionic/vue';
import { defineComponent } from 'vue';
export default defineComponent({
components: {
IonItem,
IonLabel,
IonList,
IonListHeader,
IonSelect,
IonSelectOption
},
setup() {
const customAlertOptions: any = {
header: 'Pizza Toppings',
subHeader: 'Select your toppings',
message: '$1.00 per topping',
translucent: true
};
const customPopoverOptions: any = {
header: 'Hair Color',
subHeader: 'Select your hair color',
message: 'Only select your dominant hair color'
};
const customActionSheetOptions: any = {
header: 'Colors',
subHeader: 'Select your favorite color'
};
return {
customAlertOptions,
customPopoverOptions,
customActionSheetOptions
}
}
});
</script>
Properties
cancelText
Description | The text to display on the cancel button. |
Attribute | cancel-text |
Type | string |
Default | 'Cancel' |
compareWith
Description | A property name or function used to compare object values |
Attribute | compare-with |
Type | ((currentValue: any, compareValue: any) => boolean) | null | string | undefined |
Default | undefined |
disabled
Description | If true , the user cannot interact with the select. |
Attribute | disabled |
Type | boolean |
Default | false |
interface
Description | The interface the select should use: action-sheet , popover or alert . |
Attribute | interface |
Type | "action-sheet" | "alert" | "popover" |
Default | 'alert' |
interfaceOptions
Description | Any additional options that the alert , action-sheet or popover interfacecan take. See the ion-alert docs, the ion-action-sheet docs and the ion-popover docs for the create options for each interface. Note: interfaceOptions will not override inputs or buttons with the alert interface. |
Attribute | interface-options |
Type | any |
Default | {} |
mode
Description | The mode determines which platform styles to use. |
Attribute | mode |
Type | "ios" | "md" |
Default | undefined |
multiple
Description | If true , the select can accept multiple values. |
Attribute | multiple |
Type | boolean |
Default | false |
name
Description | The name of the control, which is submitted with the form data. |
Attribute | name |
Type | string |
Default | this.inputId |
okText
Description | The text to display on the ok button. |
Attribute | ok-text |
Type | string |
Default | 'OK' |
placeholder
Description | The text to display when the select is empty. |
Attribute | placeholder |
Type | string | undefined |
Default | undefined |
selectedText
Description | The text to display instead of the selected option's value. |
Attribute | selected-text |
Type | null | string | undefined |
Default | undefined |
value
Description | the value of the select. |
Attribute | value |
Type | any |
Default | undefined |
Events
Name | Description |
---|---|
ionBlur | Emitted when the select loses focus. |
ionCancel | Emitted when the selection is cancelled. |
ionChange | Emitted when the value has changed. |
ionFocus | Emitted when the select has focus. |
Methods
open
Description | Open the select overlay. The overlay is either an alert, action sheet, or popover, depending on the interface property on the ion-select . |
Signature | open(event?: UIEvent | undefined) => Promise<any> |
CSS Shadow Parts
Name | Description |
---|---|
icon | The select icon container. |
placeholder | The text displayed in the select when there is no value. |
text | The displayed value of the select. |
CSS Custom Properties
Name | Description |
---|---|
--padding-bottom | Bottom padding of the select |
--padding-end | Right padding if direction is left-to-right, and left padding if direction is right-to-left of the select |
--padding-start | Left padding if direction is left-to-right, and right padding if direction is right-to-left of the select |
--padding-top | Top padding of the select |
--placeholder-color | Color of the select placeholder text |
--placeholder-opacity | Opacity of the select placeholder text |