@ckeditor/ckeditor5-image/theme/imageplaceholder.css

Image feature for CKEditor 5.

/*
 * Copyright (c) 2003-2023, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */

.ck.ck-editor__editable {
	& img.image_placeholder {
		background-size: 100% 100%;
	}
}