问题描述
考虑下面的页面(伪代码)
< header>
< search>
< form>
<输入文字> <输入提交>
< / form>
< / search>
< menu>
< ul>
< li>档案< / li>
< li>编辑< / li>
< li>文字< / li>
< / ul>
< / menu>
< / header>
< content>< / content>
< footer>< / footer>
当页面加载时,我希望标题显示例如10秒,然后淡出接下来的几秒钟。我可以用 $ b
jQuery.fn.delay = function(time,func){
return this.each (function(){
setTimeout(func,time);
});
};
$(header)。delay(5000,function(){$(this).fadeOut(2000)});
问题是,当标题淡出时,页面的其余部分(内容,页脚)占据标题占据的地方。我希望头部有点像display:block那样,它的位置永远不会放弃。
然后,头部消失后,我想将它带回到mouseOver,并在mouseOut上再次淡出。我试过以下内容:
$ $ $ $ $ $ $ $(header)。hover(function(){$(this).show(slow ); $(this).hide(slow)});
但是,这似乎并没有做这项工作。其中一个,标题反复出入,并导致页面的其余部分向上移动。
我该如何实现效果?
用 display:none; 完成,如果你不想这样做,可以使用改为(它不会设置 display
$(header)。delay(5000).fadeTo(2000,0 );
(注意这里使用)
,悬停功能消失,不会导致移动,如下所示:
$(header)。hover(function(){
$(this).fadeTo(600,1);
},函数(){
$(this).fadeTo(600,0);
});
Consider the page as below (pseudocode)
<header> <search> <form> <input text> <input submit> </form> </search> <menu> <ul> <li>File</li> <li>Edit</li> <li>Text</li> </ul> </menu> </header> <content></content> <footer></footer>
When the page loads, I want the header to show for, say 10 seconds, then fade out over the next couple of seconds. I can accomplish that with
jQuery.fn.delay = function(time, func){ return this.each(function(){ setTimeout(func, time); }); }; $("header").delay(5000, function() { $(this).fadeOut(2000) });
The problem is, when header fades out, the rest of the page (content, footer) bumps up to take up the place occupied by header. I want header to be sort of like "display: block" in that, its place is never given up.
Then, after header has faded away, I would like to bring it back on mouseOver, and fade out again on mouseOut. I tried the following
$("header").hover(function() { $(this).show("slow"); $(this).hide("slow") });
But, that doesn't seem to do the work. One, the header bounces in and out, and also causes the rest of the page to move up.
How can I accomplish the effect?
.fadeOut() finishes with a display: none;, if you don't want to do that, use .fadeTo() instead (which won't set display at the end), like this:
$("header").delay(5000).fadeTo(2000, 0);
(note this uses the built-in .delay() function)
You can try out a full demo here, with the hover functionality fading and not causing movement as well, like this:
$("header").hover(function() { $(this).fadeTo(600, 1); }, function() { $(this).fadeTo(600, 0); });
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