Trigger an event when a file is uploaded on Sharepoint 2013 by drag and drop

If you want to trigger an event after a drag&drop a file for an upload operation on Sharepoint, then you’ll have to add some JavaScript into your page.

// we need to make sure sp.core.js is loaded
SP.SOD.executeOrDelayUntilScriptLoaded(function() {
  window.UploadFinishFunc=function(b, a) {
    typeof g_currentControl.postUploadFunc == "function" && a.status != UploadStatus.CANCELLED && g_currentControl.postUploadFunc(a.files);
    a.status != UploadStatus.CANCELLED && myPostUploadFunc(a);
    g_currentControl.status = ControlStatus.UPLOADED;
    UpdateProgressBar(ProgressMessage.UPLOADED, a);
    RefreshResult(a);
    g_currentControl.status = ControlStatus.IDLE
  }
}, 'sp.core.js');
SP.SOD.executeFunc('sp.core.js')

// below is the function that will be called
function myPostUploadFunc(data) {
  console.log("myPostUploadFunc => ",data)
}