@cleerlycode/cornerstone-wado-image-loader/examples/customWebWorkerTask/sleepTask.js

Cornerstone ImageLoader for DICOM WADO-URI

// wrap your task in an immediate function to avoid global namespace collisions with other tasks
(function () {
  
  var sleepConfig;
  
  function sleepTaskInitialize(config) {
    sleepConfig = config;
  }
  
  function sleepTaskHandler(data, doneCallback) {
  
    // we fake real processing by setting a timeout
    setTimeout(function() {
      // once the task is done, we invoke the callback with our result
      doneCallback({});
    }, sleepConfig.sleepTask.sleepTime);
  }
  
  // register ourselves to receive messages
  cornerstoneWADOImageLoaderWebWorker.registerTaskHandler({
    taskType :'sleepTask',
    handler: sleepTaskHandler  ,
    initialize: sleepTaskInitialize
  });
}());