Please refer my website: http://opengrok.club/topic/21/代码浏览功能介绍-features-of-source-code-viewer/6 Especially in my iPhone, when I scroll up, the image of replies from 1-5 can not be shown sometimes, around 80% times. I had a short analyze about this, found the hidden image tag data-state always stays 'loading'. In my laptop, around 20% times it will not be shown. Is is caused by network condition? or it's a bug in image.js?