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Tip: Use Web Workers to Do the Script-intensive Work in the Background

Learn how Web workers can improve the overall performance of a web page and also enhance the user experience.


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Web Workers allow you to run JavaScript code in the background without blocking the web page user interface. Web workers can improve the overall performance of a web page and also enhance the user experience.

In the example below, the intensive work is in the script lengthytask.jsand it is invoked through a button click. This runs in the background without impacting the performance of the web page.

$(document).ready(function () {
      if (Modernizr.webworkers)
      {
          $("#buttonCompute").click(function () {
                var worker = new Worker("scripts/lengthytask.js");
                worker.addEventListener("message", function (evt) {
                     //cb
                },false);
                worker.postMessage();
            });
        }); 

 

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