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<Why innerHTML can ruin your AJAX applications ⁄ >




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The reason I am writing this article is because of some work I have been doing recently. My client wants a persistent AJAX application to work in IE6+. This means the web page will be left running for days/weeks on end without being refreshed or the browser being closed. This means it cannot have ANY memory leaks.

I currently process incoming XML using an XSL document - which works very well. However when done under IE6 the XSL transformation is output as plain text [please let me know if there is a DOM alternative] which means the only way to insert my newly transformed code is to use innerHTML. This seems to leak memory like a biatch! Note that the leak doesn't occur in FireFox.

So why does innerHTML leak? Well after some digging I found out a few interesting facts - lets look at the who, where, why and how...



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