ion-textarea

Contents

textareaコンポーネントは複数行テキストの入力のためのコンポーネントです。ネイティブのtextarea要素がこのコンポーネントの内部に描画されます。ネイティブのtextareaを制御することによって、textareaコンポーネントのユーザ体験と対話性が向上します。

ネイティブのtextarea要素とは異なり、Ionicのtextareaは要素内部のコンテンツからその値を読み込むことをサポートしていません。textareaの値はvalue属性で設定しなくてはなりません。

textareaコンポーネントはIonicのプロパティに加えてネイティブのtextareaの属性に対応します。

利用方法

<!-- Default textarea -->
<ion-textarea></ion-textarea>

<!-- Textarea in an item with a placeholder -->
<ion-item>
  <ion-textarea placeholder="Enter more information here..."></ion-textarea>
</ion-item>

<!-- Textarea in an item with a floating label -->
<ion-item>
  <ion-label position="floating">Description</ion-label>
  <ion-textarea></ion-textarea>
</ion-item>

<!-- Disabled and readonly textarea in an item with a stacked label -->
<ion-item>
  <ion-label position="stacked">Summary</ion-label>
  <ion-textarea
    disabled
    readonly
    value="Ionic enables developers to build performant, high-quality mobile apps.">
  </ion-textarea>
</ion-item>

<!-- Textarea that clears the value on edit -->
<ion-item>
  <ion-label>Comment</ion-label>
  <ion-textarea clearOnEdit="true"></ion-textarea>
</ion-item>

<!-- Textarea with custom number of rows and cols -->
<ion-item>
  <ion-label>Notes</ion-label>
  <ion-textarea rows="6" cols="20" placeholder="Enter any notes here..."></ion-textarea>
</ion-item>
<!-- Default textarea -->
<ion-textarea></ion-textarea>

<!-- Textarea in an item with a placeholder -->
<ion-item>
  <ion-textarea placeholder="Enter more information here..."></ion-textarea>
</ion-item>

<!-- Textarea in an item with a floating label -->
<ion-item>
  <ion-label position="floating">Description</ion-label>
  <ion-textarea></ion-textarea>
</ion-item>

<!-- Disabled and readonly textarea in an item with a stacked label -->
<ion-item>
  <ion-label position="stacked">Summary</ion-label>
  <ion-textarea
    disabled
    readonly
    value="Ionic enables developers to build performant, high-quality mobile apps.">
  </ion-textarea>
</ion-item>

<!-- Textarea that clears the value on edit -->
<ion-item>
  <ion-label>Comment</ion-label>
  <ion-textarea clear-on-edit="true"></ion-textarea>
</ion-item>

<!-- Textarea with custom number of rows and cols -->
<ion-item>
  <ion-label>Notes</ion-label>
  <ion-textarea rows="6" cols="20" placeholder="Enter any notes here..."></ion-textarea>
</ion-item>
import React from 'react';
import { IonTextarea, IonItem, IonLabel, IonContent } from '@ionic/react';

export const TextAreaExample: React.FunctionComponent = () => (
  <IonContent>
    {/*-- Default textarea --*/}
    <IonTextarea></IonTextarea>

    {/*-- Textarea in an item with a placeholder --*/}
    <IonItem>
      <IonTextarea placeholder="Enter more information here..."></IonTextarea>
    </IonItem>

    {/*-- Textarea in an item with a floating label --*/}
    <IonItem>
      <IonLabel position="floating">Description</IonLabel>
      <IonTextarea></IonTextarea>
    </IonItem>

    {/*-- Disabled and readonly textarea in an item with a stacked label --*/}
    <IonItem>
      <IonLabel position="stacked">Summary</IonLabel>
      <IonTextarea
        disabled
        readonly
        value="Ionic enables developers to build performant, high-quality mobile apps.">
      </IonTextarea>
    </IonItem>

    {/*-- Textarea that clears the value on edit --*/}
    <IonItem>
      <IonLabel>Comment</IonLabel>
      <IonTextarea clearOnEdit={true}></IonTextarea>
    </IonItem>

    {/*-- Textarea with custom number of rows and cols --*/}
    <IonItem>
      <IonLabel>Notes</IonLabel>
      <IonTextarea rows={6} cols={20} placeholder="Enter any notes here..."></IonTextarea>
    </IonItem>
  </IonContent>
);
<template>
  <!-- Default textarea -->
  <ion-textarea></ion-textarea>

  <!-- Textarea in an item with a placeholder -->
  <ion-item>
    <ion-textarea placeholder="Enter more information here..."></ion-textarea>
  </ion-item>

  <!-- Textarea in an item with a floating label -->
  <ion-item>
    <ion-label position="floating">Description</ion-label>
    <ion-textarea></ion-textarea>
  </ion-item>

  <!-- Disabled and readonly textarea in an item with a stacked label -->
  <ion-item>
    <ion-label position="stacked">Summary</ion-label>
    <ion-textarea
      disabled
      readonly
      value="Ionic enables developers to build performant, high-quality mobile apps.">
    </ion-textarea>
  </ion-item>

  <!-- Textarea that clears the value on edit -->
  <ion-item>
    <ion-label>Comment</ion-label>
    <ion-textarea clearOnEdit="true"></ion-textarea>
  </ion-item>

  <!-- Textarea with custom number of rows and cols -->
  <ion-item>
    <ion-label>Notes</ion-label>
    <ion-textarea rows="6" cols="20" placeholder="Enter any notes here..."></ion-textarea>
  </ion-item>
</template>

プロパティ

autoGrow

Description

If true, the element height will increase based on the value.

Attributeauto-grow
Typeboolean
Defaultfalse

autocapitalize

Description

Indicates whether and how the text value should be automatically capitalized as it is entered/edited by the user.

Attributeautocapitalize
Typestring
Default'none'

autofocus

Description

This Boolean attribute lets you specify that a form control should have input focus when the page loads.

Attributeautofocus
Typeboolean
Defaultfalse

clearOnEdit

Description

If true, the value will be cleared after focus upon edit. Defaults to true when type is "password", false for all other types.

Attributeclear-on-edit
Typeboolean
Defaultfalse

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.

Attributecolor
Typestring | undefined

cols

Description

The visible width of the text control, in average character widths. If it is specified, it must be a positive integer.

Attributecols
Typenumber | undefined

debounce

Description

Set the amount of time, in milliseconds, to wait to trigger the ionChange event after each keystroke.

Attributedebounce
Typenumber
Default0

disabled

Description

If true, the user cannot interact with the textarea.

Attributedisabled
Typeboolean
Defaultfalse

maxlength

Description

If the value of the type attribute is text, email, search, password, tel, or url, this attribute specifies the maximum number of characters that the user can enter.

Attributemaxlength
Typenumber | undefined

minlength

Description

If the value of the type attribute is text, email, search, password, tel, or url, this attribute specifies the minimum number of characters that the user can enter.

Attributeminlength
Typenumber | undefined

mode

Description

The mode determines which platform styles to use.

Attributemode
Type"ios" | "md"

name

Description

The name of the control, which is submitted with the form data.

Attributename
Typestring
Defaultthis.inputId

placeholder

Description

Instructional text that shows before the input has a value.

Attributeplaceholder
Typenull | string | undefined

readonly

Description

If true, the user cannot modify the value.

Attributereadonly
Typeboolean
Defaultfalse

required

Description

If true, the user must fill in a value before submitting a form.

Attributerequired
Typeboolean
Defaultfalse

rows

Description

The number of visible text lines for the control.

Attributerows
Typenumber | undefined

spellcheck

Description

If true, the element will have its spelling and grammar checked.

Attributespellcheck
Typeboolean
Defaultfalse

value

Description

The value of the textarea.

Attributevalue
Typenull | string | undefined
Default''

wrap

Description

Indicates how the control wraps text.

Attributewrap
Type"hard" | "off" | "soft" | undefined

イベント

NameDescription
ionBlurEmitted when the input loses focus.
ionChangeEmitted when the input value has changed.
ionFocusEmitted when the input has focus.
ionInputEmitted when a keyboard input ocurred.

メソッド

getInputElement

Description

Returns the native <textarea> element used under the hood.

SignaturegetInputElement() => Promise<HTMLTextAreaElement>

setFocus

Description

Sets focus on the specified ion-textarea. Use this method instead of the global input.focus().

SignaturesetFocus() => Promise<void>

CSSカスタムプロパティ

NameDescription
--backgroundBackground of the textarea
--border-radiusBorder radius of the textarea
--colorColor of the text
--padding-bottomBottom padding of the textarea
--padding-endRight padding if direction is left-to-right, and left padding if direction is right-to-left of the textarea
--padding-startLeft padding if direction is left-to-right, and right padding if direction is right-to-left of the textarea
--padding-topTop padding of the textarea
--placeholder-colorColor of the placeholder text
--placeholder-font-styleStyle of the placeholder text
--placeholder-font-weightWeight of the placeholder text
--placeholder-opacityOpacity of the placeholder text