html - Auto height on parent container with Absolute/Fixed Children

Question

Im trying to set an automatic height a div that contains 2 child elements, positioned fixed and absolutely respecitvely.

I want my parent container to have an auto height but I know this is hard as the child elements are taken out of the page structure with their positions.

I have tried setting a height to my parent div that works, but with my layout being responsive, when its scaled down to mobile, the height remains the same where as the content within becomes stacked and so the height needs to increase with its children.

Not sure if this makes sense, I dont have my actual code on me atm but ive made a fiddle trying to explain...

http://jsfiddle.net/dPCky/

Answer 1

The parent div can not use height:auto when its children are positioned absolute / fixed.

You would need to use JavaScript to achieve this.

An example in jQuery:

var biggestHeight = 0;
// Loop through elements children to find & set the biggest height
$(".container *").each(function(){
 // If this elements height is bigger than the biggestHeight
 if ($(this).height() > biggestHeight ) {
   // Set the biggestHeight to this Height
   biggestHeight = $(this).height();
 }
});

// Set the container height
$(".container").height(biggestHeight);

Working example http://jsfiddle.net/blowsie/dPCky/1/