Some kinds of android custom buttons.
description: slide to the edge of right,if you don't do this,it will slide back to left. Looks like ios unlock button.
designed by Colin Garvin.DownloadButton
description: download progress will be shown on the button,then it shows a tick icon when finish downloading.
designed by Colin Garvin. SubmitButton
description: submit for request with circle progress.I add request error status which implemented by codrops.Link to frontend repostory.
