ion-loading

scoped

An overlay that can be used to indicate activity while blocking user interaction. The loading indicator appears on top of the app's content, and can be dismissed by the app to resume user interaction with the app. It includes an optional backdrop, which can be disabled by setting showBackdrop: false upon creation.

Basic Usage

Once presented, the loading indicator will display indefinitely by default. Developers can manually dismiss the loading indicator after creation by calling the dismiss() method on the component. The onDidDismiss function can be called to perform an action after the loading indicator is dismissed.

Alternatively, developers can configure the loading indicator to dismiss automatically after a specific amount of time by passing the number of milliseconds to display it in the duration of the loading options.

Controller

Inline

Ionic React and Ionic Vue users also have the option to use the ion-loading component directly in their template.

React

import React, { useState } from 'react';
import { IonLoading, IonButton, IonContent } from '@ionic/react';

export const LoadingExample: React.FC = () => {
  const [showLoading, setShowLoading] = useState(false);

  return (
    <IonContent>
      <IonButton onClick={() => setShowLoading(true)}>Show Loading</IonButton>
      <IonLoading
        cssClass="my-custom-class"
        isOpen={showLoading}
        onDidDismiss={() => setShowLoading(false)}
        message={'Please wait...'}
        duration={5000}
      />
    </IonContent>
  );
};

Vue

<template>
  <ion-content>
    <ion-button @click="setOpen(true)">Show Loading</ion-button>
    <ion-loading
      :is-open="isOpenRef"
      cssClass="my-custom-class"
      message="Please wait..."
      :duration="timeout"
      @didDismiss="setOpen(false)"
    >
    </ion-loading>
  </ion-content>
</template>

<script lang="ts">
  import { IonButton, IonContent, IonLoading } from '@ionic/vue';
  import { defineComponent, ref } from 'vue';
  export default defineComponent({
    props: {
      timeout: { type: Number, default: 1000 },
    },
    components: { IonButton, IonContent, IonLoading },
    setup() {
      const isOpenRef = ref(false);
      const setOpen = (state: boolean) => (isOpenRef.value = state);

      return { isOpenRef, setOpen };
    },
  });
</script>

Customization

Spinners

The spinner that is used can be customized using the spinner property. See the spinner property documentation for a full list of options.

Theming

Loading uses scoped encapsulation, which means it will automatically scope its CSS by appending each of the styles with an additional class at runtime. Overriding scoped selectors in CSS requires a higher specificity selector.

We recommend passing a custom class and using that to add custom styles to the host and inner elements.

注記

ion-loading is presented at the root of your application, so we recommend placing any ion-loading styles in a global stylesheet.

Interfaces

LoadingOptions

interface LoadingOptions {
  spinner?: SpinnerTypes | null;
  message?: string | IonicSafeString;
  cssClass?: string | string[];
  showBackdrop?: boolean;
  duration?: number;
  translucent?: boolean;
  animated?: boolean;
  backdropDismiss?: boolean;
  mode?: Mode;
  keyboardClose?: boolean;
  id?: string;
  htmlAttributes?: { [key: string]: any };

  enterAnimation?: AnimationBuilder;
  leaveAnimation?: AnimationBuilder;
}

Properties

animated

Description	If true, the loading indicator will animate.
Attribute	animated
Type	boolean
Default	true

backdropDismiss

Description	If true, the loading indicator will be dismissed when the backdrop is clicked.
Attribute	backdrop-dismiss
Type	boolean
Default	false

cssClass

Description	Additional classes to apply for custom CSS. If multiple classes are provided they should be separated by spaces.
Attribute	css-class
Type	string ｜ string[] ｜ undefined
Default	undefined

duration

Description	Number of milliseconds to wait before dismissing the loading indicator.
Attribute	duration
Type	number
Default	0

enterAnimation

Description	Animation to use when the loading indicator is presented.
Attribute	undefined
Type	((baseEl: any, opts?: any) => Animation) ｜ undefined
Default	undefined

htmlAttributes

Description	Additional attributes to pass to the loader.
Attribute	undefined
Type	undefined ｜ { [key: string]: any; }
Default	undefined

keyboardClose

Description	If true, the keyboard will be automatically dismissed when the overlay is presented.
Attribute	keyboard-close
Type	boolean
Default	true

leaveAnimation

Description	Animation to use when the loading indicator is dismissed.
Attribute	undefined
Type	((baseEl: any, opts?: any) => Animation) ｜ undefined
Default	undefined

message

Description	Optional text content to display in the loading indicator. This property accepts custom HTML as a string. Developers who only want to pass plain text can disable the custom HTML functionality by setting innerHTMLTemplatesEnabled: false in the Ionic config.
Attribute	message
Type	IonicSafeString ｜ string ｜ undefined
Default	undefined

mode

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

showBackdrop

Description	If true, a backdrop will be displayed behind the loading indicator.
Attribute	show-backdrop
Type	boolean
Default	true

spinner

Description	The name of the spinner to display.
Attribute	spinner
Type	"bubbles" ｜ "circles" ｜ "circular" ｜ "crescent" ｜ "dots" ｜ "lines" ｜ "lines-sharp" ｜ "lines-sharp-small" ｜ "lines-small" ｜ null ｜ undefined
Default	undefined

translucent

Description	If true, the loading indicator will be translucent. Only applies when the mode is "ios" and the device supports backdrop-filter.
Attribute	translucent
Type	boolean
Default	false

Events

Name	Description
ionLoadingDidDismiss	Emitted after the loading has dismissed.
ionLoadingDidPresent	Emitted after the loading has presented.
ionLoadingWillDismiss	Emitted before the loading has dismissed.
ionLoadingWillPresent	Emitted before the loading has presented.

Methods

dismiss

Description	Dismiss the loading overlay after it has been presented.
Signature	dismiss(data?: any, role?: string) => Promise<boolean>

onDidDismiss

Description	Returns a promise that resolves when the loading did dismiss.
Signature	onDidDismiss<T = any>() => Promise<OverlayEventDetail<T>>

onWillDismiss

Description	Returns a promise that resolves when the loading will dismiss.
Signature	onWillDismiss<T = any>() => Promise<OverlayEventDetail<T>>

present

Description	Present the loading overlay after it has been created.
Signature	present() => Promise<void>

CSS Shadow Parts

No CSS shadow parts available for this component.

CSS Custom Properties

Name	Description
--backdrop-opacity	Opacity of the backdrop
--background	Background of the loading dialog
--height	Height of the loading dialog
--max-height	Maximum height of the loading dialog
--max-width	Maximum width of the loading dialog
--min-height	Minimum height of the loading dialog
--min-width	Minimum width of the loading dialog
--spinner-color	Color of the loading spinner
--width	Width of the loading dialog

Slots

No slots available for this component.