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Version: v6

ion-refresher

Contents

The refresher provides pull-to-refresh functionality on a content component. The pull-to-refresh pattern lets a user pull down on a list of data using touch in order to retrieve more data.

Data should be modified during the refresher's output events. Once the async operation has completed and the refreshing should end, call complete() on the refresher.

Native Refreshers

Both iOS and Android platforms provide refreshers that take advantage of properties exposed by their respective devices that give pull to refresh a fluid, native-like feel.

Certain properties such as pullMin and snapbackDuration are not compatible because much of the native refreshers are scroll-based. See Refresher Properties for more information.

iOS Usage

Using the iOS native ion-refresher requires setting the pullingIcon property on ion-refresher-content to the value of one of the available spinners. See the Spinner Documentation for accepted values. The pullingIcon defaults to the lines spinner on iOS. The spinner tick marks will be progressively shown as the user pulls down on the page.

The iOS native ion-refresher relies on rubber band scrolling in order to work properly and is only compatible with iOS devices as a result. We provide a fallback refresher for apps running in iOS mode on devices that do not support rubber band scrolling.

Android Usage

Using the MD native ion-refresher requires setting the pullingIcon property on ion-refresher-content to the value of one of the available spinners. See the ion-spinner Documentation for accepted values. pullingIcon defaults to the circular spinner on MD.

Virtual Scroll Usage

Refresher requires a scroll container to function. When using a virtual scrolling solution, you will need to disable scrolling on the ion-content and indicate which element container is responsible for the scroll container with the .ion-content-scroll-host class target.

<ion-content scroll-y="false">
  <ion-refresher slot="fixed">
    <ion-refresher-content></ion-refresher-content>
  </ion-refresher>
  <virtual-scroll-element class="ion-content-scroll-host">
    <!-- Your virtual scroll content -->
  </virtual-scroll-element>
</ion-content>

Interfaces

RefresherEventDetail

interface RefresherEventDetail {
  complete(): void;
}

RefresherCustomEvent

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 RefresherCustomEvent extends CustomEvent {
  detail: RefresherEventDetail;
  target: HTMLIonRefresherElement;
}

Usage

<!-- Default Refresher -->
<ion-content>
  <ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)">
    <ion-refresher-content></ion-refresher-content>
  </ion-refresher>
</ion-content>

<!-- Custom Refresher Properties -->
<ion-content>
  <ion-refresher slot="fixed" pullFactor="0.5" pullMin="100" pullMax="200">
    <ion-refresher-content></ion-refresher-content>
  </ion-refresher>
</ion-content>

<!-- Custom Refresher Content -->
<ion-content>
  <ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)">
    <ion-refresher-content
      pullingIcon="chevron-down-circle-outline"
      pullingText="Pull to refresh"
      refreshingSpinner="circles"
      refreshingText="Refreshing...">
    </ion-refresher-content>
  </ion-refresher>
</ion-content>
import { Component } from '@angular/core';

@Component({
  selector: 'refresher-example',
  templateUrl: 'refresher-example.html',
  styleUrls: ['./refresher-example.css'],
})
export class RefresherExample {
  constructor() {}

  doRefresh(event) {
    console.log('Begin async operation');

    setTimeout(() => {
      console.log('Async operation has ended');
      event.target.complete();
    }, 2000);
  }
}

Properties

closeDuration

DescriptionTime it takes to close the refresher. Does not apply when the refresher content uses a spinner, enabling the native refresher.
Attributeclose-duration
Typestring
Default'280ms'

disabled

DescriptionIf true, the refresher will be hidden.
Attributedisabled
Typeboolean
Defaultfalse

pullFactor

DescriptionHow much to multiply the pull speed by. To slow the pull animation down, pass a number less than 1. To speed up the pull, pass a number greater than 1. The default value is 1 which is equal to the speed of the cursor. If a negative value is passed in, the factor will be 1 instead.

For example: If the value passed is 1.2 and the content is dragged by 10 pixels, instead of 10 pixels the content will be pulled by 12 pixels (an increase of 20 percent). If the value passed is 0.8, the dragged amount will be 8 pixels, less than the amount the cursor has moved.

Does not apply when the refresher content uses a spinner, enabling the native refresher.
Attributepull-factor
Typenumber
Default1

pullMax

DescriptionThe maximum distance of the pull until the refresher will automatically go into the refreshing state. Defaults to the result of pullMin + 60. Does not apply when the refresher content uses a spinner, enabling the native refresher.
Attributepull-max
Typenumber
Defaultthis.pullMin + 60

pullMin

DescriptionThe minimum distance the user must pull down until the refresher will go into the refreshing state. Does not apply when the refresher content uses a spinner, enabling the native refresher.
Attributepull-min
Typenumber
Default60

snapbackDuration

DescriptionTime it takes the refresher to snap back to the refreshing state. Does not apply when the refresher content uses a spinner, enabling the native refresher.
Attributesnapback-duration
Typestring
Default'280ms'

Events

NameDescription
ionPullEmitted while the user is pulling down the content and exposing the refresher.
ionRefreshEmitted when the user lets go of the content and has pulled down further than the pullMin or pulls the content down and exceeds the pullMax. Updates the refresher state to refreshing. The complete() method should be called when the async operation has completed.
ionStartEmitted when the user begins to start pulling down.

Methods

cancel

DescriptionChanges the refresher's state from refreshing to cancelling.
Signaturecancel() => Promise<void>

complete

DescriptionCall complete() when your async operation has completed. For example, the refreshing state is while the app is performing an asynchronous operation, such as receiving more data from an AJAX request. Once the data has been received, you then call this method to signify that the refreshing has completed and to close the refresher. This method also changes the refresher's state from refreshing to completing.
Signaturecomplete() => Promise<void>

getProgress

DescriptionA number representing how far down the user has pulled. The number 0 represents the user hasn't pulled down at all. The number 1, and anything greater than 1, represents that the user has pulled far enough down that when they let go then the refresh will happen. If they let go and the number is less than 1, then the refresh will not happen, and the content will return to it's original position.
SignaturegetProgress() => Promise<number>
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