Progressbar: Force element.innerHTML update before javascript sort call

Posted by maras on Stack Overflow See other posts from Stack Overflow or by maras
Published on 2010-05-08T20:30:12Z Indexed on 2010/05/08 20:38 UTC
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JavaScript

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progressbar

Hi, what is the best practice for this scenario: 1) User clicks "Sort huge javascript array" 2) Browser shows "Sorting..." through element.innerHTML="Sorting" 3) Browser sorts huge javascript array (100% CPU for several seconds) while displaying "Sorting..." message. 4) Browser shows result.

Pseudo code:

...
<a href="#" onclick="sortHugeArray();return false">Sort huge array</a>
...
function sortHugeArray(){
  document.getElementById("progress").innerHTML="Sorting...";
  ...do huge sort ...
  ...render result...
  document.getElementById("progress").innerHTML=result;
}

When i do that this way, browser never shows "Sorting...", it freezes browser for several seconds and shows result without noticing user...

Thank you for advice.

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