WinJS.UI.Animation.createExpandAnimation function

Artikel
01/26/2017

Creates an object that performs an animation that expands a list.

The following video demonstrates the expand and collapse animation:

Syntax

var object = WinJS.UI.Animation.createExpandAnimation(revealed, affected);

Parameters

revealed
Type: Object

Element or elements revealed by the expansion.
affected
Type: Object

Element or elements affected by the newly revealed items.

Return value

Type: Object

An object whose execute method is used to execute the animation. The execute method returns a Promise that completes when the animation is finished.

Remarks

The parameters of this method can be expressed in several ways:

As the special value "undefined", which means that the animation has no such target
As a single object
As a JavaScript array (possibly empty) of elements.
As a NodeList (for example, the result of querySelectorAll)
As an HTMLCollection

The general usage pattern for layout animations such as this function is as follows:

Call the create function (such as the one discussed on this page) and save the result.
Change the document layout as necessary to represent the new state.
Call the execute method on the object you saved in step 1 to perform the animation.

The following code shows an example.

// Step 1: Create the animation object and save the result
var anim = WinJS.UI.Animation.createAddToListAnimation(added, affected);

// Step 2: Insert the element given in the added parameter immediately before
// the element given in the affected parameter. This causes both elements to move.
affected.parentNode.insertBefore(added, affected);

// Step 3: Execute the animation
anim.execute();

Note The execute method can be invoked only once on the animation object created by the function. To perform multiple animations, create multiple animation objects and execute each one separately.

Requirements

Minimum WinJS version	WinJS 1.0
Namespace	WinJS.UI.Animation

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