Keyboard

Customizing and accounting for the presence of an on-screen keyboard are two common roadblocks developers face when building mobile apps and PWAs. This guide will provide an introduction to the various tools available for managing the on-screen keyboard in your application.

inputmode

The inputmode attribute allows developers to specify what type of data might be entered into an input. This will prompt the browser to show a keyboard that includes buttons relevant to what the user may enter. For example, inputmode="email" will display a keyboard with the @ key as well as other optimizations for entering emails.

Since inputmode is a global attribute, it can be used on Ionic components such as ion-input and ion-textarea in addition to regular input elements.

Inputs that require a certain data type should use the type attribute instead. For example, inputs that require an email should use type="email" rather than specifying an inputmode. This is because the data that will be entered is always going to be in the form of an email. On the other hand, if the input accepts an email or a username, using inputmode=”email” is appropriate because the data being entered is not always going to be an email address.

For a list of accepted values, see the inputmode Documentation.

Usage

注記

The inputmode attribute is supported on devices running Chrome 66+ and iOS Safari 12.2+: https://caniuse.com/#search=inputmode

enterkeyhint

The enterkeyhint attribute allows developers to specify what type of action label or icon should be shown for the "Enter" key. Using enterkeyhint lets the user know what will happen when they tap the “Enter” key. The value that should be specified here depends on the context of what the user is doing. For example, if the user is typing into a searchbox, developers should ensure that the input has enterkeyhint="search".

Since enterkeyhint is a global attribute, it can be used on Ionic components such as ion-input and ion-textarea in addition to regular input elements.

For a list of accepted values, see the enterkeyhint Standard.

Usage

注記

The enterkeyhint attribute is supported on devices running Chrome 77+ and iOS Safari 13.4+.

Dark Mode

By default the keyboard theme is determined by the OS. For example, if dark mode is enabled on iOS, the keyboard in your app will appear with a dark theme even if your application does not have a dark theme in its CSS.

When running an app in a mobile web browser or as a PWA there is no way to force the keyboard to appear with a certain theme.

When running an app in Capacitor or Cordova, it is possible to force the keyboard to appear with a certain theme. For more information regarding this configuration, see the Capacitor Keyboard Documentation.

Hiding the Accessory Bar

When running any kind of web based application, iOS will show an accessory bar above the keyboard. This allows users to move to the next or previous inputs as well as close the keyboard.

When running an app in a mobile web browser or as a PWA there is no way to hide the accessory bar.

When running an app in Capacitor or Cordova, it is possible to hide the accessory bar. For more information regarding this configuration, see the Capacitor Keyboard Documentation.

Keyboard Lifecycle Events

Detecting the presence of an on-screen keyboard is useful for adjusting the positioning of an input that would otherwise be hidden by the keyboard. For Capacitor and Cordova apps, developers typically rely on native keyboard plugins to listen for the keyboard lifecycle events. For apps running in a mobile browser or as a PWA, developers can use the Visual Viewport API where supported. Ionic Framework wraps both of these approaches and emits ionKeyboardDidShow and ionKeyboardDidHide events on the window. The event payload for ionKeyboardDidShow contains an approximation of the keyboard height in pixels.

Usage

JavaScript

window.addEventListener('ionKeyboardDidShow', ev => {
  const { keyboardHeight } = ev;
  // Do something with the keyboard height such as translating an input above the keyboard.
});

window.addEventListener('ionKeyboardDidHide', () => {
  // Move input back to original location
});

Angular

import { Platform } from '@ionic/angular';

...

constructor(private platform: Platform) {
  this.platform.keyboardDidShow.subscribe(ev => {
    const { keyboardHeight } = ev;
    // Do something with the keyboard height such as translating an input above the keyboard.
  });

  this.platform.keyboardDidHide.subscribe(() => {
    // Move input back to original location
  });
}

Angular (Standalone)

import { Platform } from '@ionic/angular/standalone';

...

constructor(private platform: Platform) {
  this.platform.keyboardDidShow.subscribe(ev => {
    const { keyboardHeight } = ev;
    // Do something with the keyboard height such as translating an input above the keyboard.
  });

  this.platform.keyboardDidHide.subscribe(() => {
    // Move input back to original location
  });
}

React

import { useKeyboardState } from '@ionic/react-hooks/keyboard';

...

const { isOpen, keyboardHeight } = useKeyboardState();

// Do something with the keyboard height such as translating an input above the keyboard

Vue

import { useKeyboard } from '@ionic/vue';
import { watch } from 'vue';

...

const { isOpen, keyboardHeight } = useKeyboard();

watch(keyboardHeight, () => {
  console.log(`Is Keyboard Open: ${isOpen.value}, Keyboard Height: ${keyboardHeight.value}`);
});

注記

For apps running in a mobile web browser or as a PWA, Keyboard Lifecycle Events are only supported on Chrome 62+ and iOS Safari 13.0+.