Is it able to support thumbnail of a image

[phoeson]

Is it able to add a feature to support load a thumbnail of a image before the real image is downloaded

[jvanlangen]

If you want a thumbnail, it should be available as a separate image or you could only download parts of a progressive jpeg (which are different chunks of image resolutions) see https://www.liquidweb.com/kb/what-is-a-progressive-jpeg/