onGalleryNavigationStart( )

Adds an event handler that runs when the gallery starts navigation.

You can use onGalleryNavigationStart() event handler to trigger an action when gallery navigation starts. For example, synchronizing the scrolling of 2 galleries.

Method Declaration
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Method Parameters
handlerfunctionRequired

handler(event: GalleryNavigationStartEvent): void The name of the function or the function expression to run when the gallery starts navigation.

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