<!DOCTYPE html> <html> <head> <meta content="text/html; charset=utf-8" http-equiv="content-type"/> <script data-bootload="main.js" data-main="/common/boot.js" src="/bower_components/requirejs/require.js"></script> <link rel="icon" type="image/png" href="/customize/main-favicon.png" data-main-favicon="/customize/main-favicon.png" data-alt-favicon="/customize/alt-favicon.png" id="favicon" /> <style> input { width: 50vw; padding: 15px; } pre { max-width: 90vw; overflow: auto; } </style> </head> <body> <h1>Upload</h1> <input type="file">