Programmatic Upload

Add files and trigger uploads programmatically via the JavaScript API, without user interaction with the browse button.

What you should see: no visible controls at all — everything is triggered from code. Auto-upload is off so the start call is explicit.

Drag & drop files here, or paste from clipboard

<core-upload id="programmaticUploader"
 asp-upload-url="/api/upload/upload"
 asp-multiple="true"
 asp-progress="true"
 asp-auto-upload="false">
</core-upload>

<button id="btn-start-upload">Start Upload</button>

<script>
var uploader = CoreUpload.getInstance('#programmaticUploader');

document.getElementById('btn-start-upload')
 .addEventListener('click', function() {
 uploader.upload();
 });
</script>