Zooming-in does not move the image to the correct position

[HunterGraubard]

• URL to reproduce the issue: http://desmonding.me/zooming/
• OS: Windows 10 Pro
• Browser and version: Chrome 65.0.3325.181, Firefox 61.0a1.

Steps to reproduce:

1. Open a full size image in the viewer.
2. Click down with the mouse, or touch down with a finger.

The expected result is that the image will zoom in to its full size, without moving the image at the point below the cursor/finger. For example, if you touch down on somebody's head, their head should remain under the cursor or finger as the image zooms in to its full size.

Instead, Zooming seems to move the image an excessive amount, moving it increasingly too much as you click further out from the center of the image. For example, on the Zooming demo page, open the first image on the page in the viewer. Then click down on the person's head. After the image zooms in further to its full-size, the cursor/finger ends up positioned at the person's feet, instead of their head.

For an example of the expected result, see PhotoSwipe's demo page: http://photoswipe.com

[kingdido999]

Yes, this is a valid point which can be improved.