Demo uploads land in a
temporary store and are swept after 60 minutes. To keep files, handle
FileUploaded — see
Single File for the complete save pattern.
Tunable pacing Smooth custom bars Built-in sample files
This demo keeps AjaxUploader in real chunked-upload mode, then adds a small page-local delay between chunks
so you can inspect beautiful progress bars on localhost without needing a slow network.
What you should see: the built-in bar moving as bytes leave the browser and settling at 100% when the server acknowledges. Throttle the network to watch it move.
Queue and pacing controls
Drop files here, browse from disk, or generate sample payloads in the browser. The selected pacing profile applies when you start the queue.
Drop files to begin your progress test
Click anywhere in this panel to browse, or use one of the sample generators below for repeatable progress-bar checks.
Slow mode presets Demo Slow
Smaller chunks plus a larger delay make the animation easier to study. This pacing is simulated on the client side for QA and presentation work.
Sample payloads Queue synthetic files
Ready Overall progress blends the entire queue into one clean hero bar so you can validate timing, easing, and milestone states at a glance.
0%
Transferred: 0 B of 0 B Pacing: 420 ms delay / 192 KB chunks
Throughput
--
Live aggregate upload speed.
ETA
--
Time remaining for the current queue.
Queue
No files
Pending: 0 / Paused: 0
Mood
Demo Slow
Balanced pacing for visual QA.
The ring gives you a second read on the same queue, which is helpful when comparing circular treatments against the main horizontal bar.
Per-file runway
Each card shows the same upload data in a more detailed presentation, including status, transfer rate, ETA, and a simple segment rail.
No files are queued yet. Add one from disk or generate a sample file to start watching the progress bars.
AjaxUploader.create('#progressLabUploader', {
uploadUrl: uploadUrl,
chunked: true,
chunkSize: 192 * 1024,
autoUpload: false,
browseButton: '#progressBrowseButton',
dropTarget: '#progressDrop',
headers: function () {
return { 'X-Demo-Chunk-Delay': String(currentDelayMs) };
},
onProgress: renderProgressState
});