Since 消退() http://api.jquery.com/fadeOut/通过隐藏目标元素来完成,很可能在加载新数据时您的 #main 将完全隐藏,从而使任何高度的动画不可见,因此毫无意义。
But you could只需使用类似的东西$('#main').show(400) http://api.jquery.com/show/这将使元素从大小 (0,0) 和不透明度 0 动画到容器和内容允许的任何大小以及完全可见的不透明度 1(并并行运行这些动画,使它们都可见) 。
但是假设您确实更关心高度动画而不是淡入淡出,那么您仍然遇到一个问题:当 load() 调用其回调时,目标元素的高度已经be内容的高度(或尽可能接近它)。所以动画不会做任何事情。
我在上一个问题上发布了一个插件 https://stackoverflow.com/questions/244758/jquery-animation-smooth-size-transition这将做你想做的事,但你需要使用$.get() http://api.jquery.com/jQuery.get/代替load() http://api.jquery.com/load/:
$.get(url, function(data) {
$('#main').showHtml(data);
});
...其中 showHtml 定义为:
// Animates the dimensional changes resulting from altering element contents
// Usage examples:
// $("#myElement").showHtml("new HTML contents");
// $("div").showHtml("new HTML contents", 400);
// $(".className").showHtml("new HTML contents", 400,
// function() {/* on completion */});
(function($)
{
$.fn.showHtml = function(html, speed, callback)
{
return this.each(function()
{
// The element to be modified
var el = $(this);
// Preserve the original values of width and height - they'll need
// to be modified during the animation, but can be restored once
// the animation has completed.
var finish = {width: this.style.width, height: this.style.height};
// The original width and height represented as pixel values.
// These will only be the same as `finish` if this element had its
// dimensions specified explicitly and in pixels. Of course, if that
// was done then this entire routine is pointless, as the dimensions
// won't change when the content is changed.
var cur = {width: el.width()+'px', height: el.height()+'px'};
// Modify the element's contents. Element will resize.
el.html(html);
// Capture the final dimensions of the element
// (with initial style settings still in effect)
var next = {width: el.width()+'px', height: el.height()+'px'};
el .css(cur) // restore initial dimensions
.animate(next, speed, function() // animate to final dimensions
{
el.css(finish); // restore initial style settings
if ( $.isFunction(callback) ) callback();
});
});
};
})(jQuery);