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• Do I have to clean custom properties (Expandos) on window.onunload event?

  - by burak ozdogan

  Hi, In one article I have seen that it may be good to clear all expandos on window.unload event to prevent memory leaks. I cannot understand why to do this. Isn't the browser cleaning all the DOM and its relevant resources of it once you leave the page anyway? Thanks, burak ozdogan

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• Why .data() function of jQuery is better to prevent memory leaks?

  - by burak ozdogan

  Hi, Regarding to jQuery utility function jQuery.data() the online documentation says: "The jQuery.data() method allows us to attach data of any type to DOM elements in a way that is safe from circular references and therefore from memory leaks. " Why to use: document.body.foo = 52; can result a memory leak -or in what conditions- so that I should use jQuery.data(document.body, 'foo', 52); Should I ALWAYS prefer .data() instead of using expandos in any case? (I would appreciate if you can provide an example to compare the differences) Thanks, burak ozdogan

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