How to upload something with “ajax” look!

I’ve been working on G-Projects (my first wordpress plugin that’ll be published soon) for a while now. The most irritating and annoying issue that I faced was uploading a file without leaving the page. Ofcourse the first thing that came to my mind was to use jQuery as it solved like 100% of my problems excluding this one. I figured out that to upload something (in my case an image) without leaving the same page i.e. “ajax” you have to use an iframe as it seems that no one has invented it yet!
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