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Editorial Team
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Asked: 2026-05-23T08:59:12+00:00

Have you noticed that by using jquery’s slideDown(), even on elements with dynamic content,

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Have you noticed that by using jquery’s slideDown(), even on elements with dynamic content, you always get the perfect height of the effected element. Which is, for me at least, impossible to do by simply animating the css height value. Mostly because there is no way for me to know how did the height of an element (with a display:none) changed, during a dynamic content (AJAX) update.

And since i’ve been working on some custom controls, i do need that capability to calculate things the way slideDown() does.

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1 Answer

  1. Editorial Team

    If you are inserting a new dinamically loaded content, it means you have that element in memory, so you can refer to it and know its height. You only have to read its height (or maybe outerHeight) and slide by that amount.

    EDIT

    Just give a height of 0 to the hiden item and overflow:hidden, so that the content inside it won’t be sohwn, and it will retain its height.

    http://jsfiddle.net/jgyLm/9/

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