var heightElems = $("#elems").outerHeight();
var heightMedianil = 10;
var heightWrap = heightElems - heightMedianil + "px";
$("#wrap").css({"height" : heightWrap, "visibility" : "visible"});
/*
Por que se produce el efecto "pestaneo"?
porque cuando carga la pagina: primero lee el html/css y luego resta el alto desde javascript.
como hago para que no se produzca?
1 ocultamos #wrap con visibility:hidden en la hoja de estilos
2 luego, lo mostramos con visibility:visible. en el script
resultado:
primero leera el html/css (lee el alto de #elems y el ultimo medianil) pero sin mostrar el bloque
luego restaamos el medianil final al alto de #elems y lo asignamos a #wrap
como mostramos luego de que javascript haya trabajado el efecto pestaneo desaparece.
*/
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