Question

Is it possible to delete some images from the browser (firefox2) memory using javascript? By doing this, I want to save some precious browser memory and let my web app to work better.

I guess that if possible, it will be something like this:

delete (document.images[7]);


document.images[7].src = null;


document.images[7] = null;

Answer 1

The most sensible thing would be to remove the Image element from the DOM.

var img = document.images[7]; img.parentNode.removeChild(img)

I don’t know how much memory that is going to save you, if at all. The delete operator wouldn’t do anything in this case because the HTMLCollection returned is ready-only.

Is there a particular reason you need to free up memory? Perhaps there are some memory leaks? Maybe this would help: http://www.ibm.com/developerworks/web/library/wa-memleak/.