Priority Queue

Assign priority levels to files. Higher-priority files upload first, regardless of when they were added to the queue.

What you should see: files uploaded in a priority order you set rather than selection order, so the important file goes first even if it was added last.

Select files to begin.

var uploader = CoreUpload.create('#priority-uploader', {
 uploadUrl: '/api/upload/upload',
 multiple: true,
 autoUpload: false,
 concurrent: 1,
 onFileAdded: function(file) {
 // Assign priority: small files get higher priority
 if (file.size < 100 * 1024) {
 file.priority = 3; // high
 } else if (file.size < 1024 * 1024) {
 file.priority = 2; // medium
 } else {
 file.priority = 1; // low
 }
 },
 onTaskComplete: function(file) {
 console.log('Uploaded:', file.name, 'priority:', file.priority);
 }
});

document.getElementById('btn-priority-upload').onclick = function() {
 uploader.upload();
};

Deciding what goes first

Concurrency decides how many files move at once; priority decides which ones get those slots. Together they answer the real question with a long queue — not just how fast, but what the user sees finish first.

Perception matters as much as throughput

Finishing the one file the user is waiting to look at, ahead of forty they will never open individually, makes the same total upload feel dramatically shorter. Nothing about the bytes changed; the ordering did.