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Version: v6

ion-refresher

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 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, complete() needs to be called on the refresher.

Basic Usage

Pull Properties

The refresher has several properties for customizing the pull gesture. Set the pullFactor to change the speed of the pull, the pullMin property to change the minimum distance the user must pull down, and the pullMax property to change the maximum distance the user must pull down before the refresher enters the refreshing state.

These properties do not apply when the native refresher is enabled.

Custom Refresher Content

The default icon, spinner, and text can be customized on the refresher content based on whether the state of the refresher is pulling or refreshing.

Setting pullingIcon will disable the native refresher.

Native Refreshers

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

The iOS and Material Design native refreshers are enabled by default in Ionic. However, the native iOS 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.

The native refresher uses a circular spinner for Material Design, while iOS uses the lines spinner. On iOS, the tick marks will progressively show as the page is pulled down.

Certain refresher properties such as the Pull Properties, closeDuration and snapbackDuration are not compatible because much of the native refreshers are scroll-based. See Properties for more information on unsupported properties.

The native refreshers can be disabled by setting the pullingIcon on the refresher content to any icon or spinner. See the Ionicons and Spinner documentation for accepted values.

Usage with Virtual Scroll

Refresher が機能するためには、スクロールコンテナが必要です。仮想スクロールを使用する場合は、ion-content のスクロールを無効にし、.ion-content-scroll-host クラスターゲットで、どの要素コンテナがスクロールコンテナを担当するかを指定する必要があります。

Advanced Usage

While the refresher can be used with any type of content, a common use case in native apps is to display a list of data that gets updated on refresh. In the below example, the app generates a list of data and then appends data to the top of the list when the refresh is completed. In a real app, the data would be received and updated after sending a request via a network or database call.

Interfaces

RefresherEventDetail

interface RefresherEventDetail {
complete(): void;
}

RefresherCustomEvent

必須ではありませんが、このコンポーネントから発行される Ionic イベントでより強く型付けを行うために、CustomEvent インターフェースの代わりにこのインターフェースを使用することが可能です。

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

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'

イベント

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.

メソッド

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>

CSS Shadow Parts

No CSS shadow parts available for this component.

CSSカスタムプロパティ

No CSS custom properties available for this component.

Slots

No slots available for this component.