sp webpart base.basewebpart.previewimageurl

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BaseWebPart.previewImageUrl property

This property points to the preview image for the web part. The base implementation returns undefined. Web parts that want to provide a valid preview image url need to override this API. The preview image url can be used to create a preview of the web part or of the page on which the web part is present. virtual

Signature:

get previewImageUrl(): string | undefined;