html - CSS3 menu fadeOut not working in firefox -


i'm trying create menu simple fade effect. working fine in chrome, when leave mouse , move mouse in dropdown remains on place cause of animation. however: in firefox animation menuhoverfadeout not working @ all. in firefox animation makes no sense. using following css code: 

#cssmenu li > ul {   background: #005588;   border: 1px solid #004477;   position: absolute;   width: auto;   z-index: 5000;   opacity:0;   animation: menuhoverfadeout 0.5s ease-in-out;   -webkit-animation: menuhoverfadeout 0.5s ease-in-out; /* safari , chrome */   animation-transition-property: opacity;   top:-9999px; }  #cssmenu li:hover > ul {   opacity:1;   animation: menuhoverfadein 0.5s linear;   -webkit-animation: menuhoverfadein 0.5s linear;   top:auto; }  @keyframes menuhoverfadein {     {opacity:0;}to {opacity:1;} }  @-webkit-keyframes menuhoverfadein {     {opacity:0;}to {opacity:1;} }  @keyframes menuhoverfadeout {     0%   {opacity:1;top:initial;}     50%   {opacity:1;top:initial;}     100% {opacity:0;top:-9999;} }  @-webkit-keyframes menuhoverfadeout {     0%   {opacity:1;top:initial;}     50%   {opacity:1;top:initial;}     100% {opacity:0;top:-9999;} }

with following html structure:

<div id='cssmenu'>   <ul id='main'>    <li>home      <ul>         <li>test1</li>         <li>test2</li>         <li>test3</li>      </ul>    </li>    <li>about      <ul>         <li>test1</li>         <li>test2</li>         <li>test3</li>      </ul>    </li>     </ul> </div>

i see way works in chrome, tried in transition didn't work in it.

http://jsfiddle.net/jgafl/1/

provide browser specific prefix firefox (and opera):

@-webkit-keyframes menuhoverfadeout {     /* ... */ } @-moz-keyframes menuhoverfadeout {     /* ... */ } @-o-keyframes menuhoverfadeout {     /* ... */ } @keyframes menuhoverfadeout {     /* ... */ }  /* (...) */  #cssmenu li > ul {     -webkit-animation: menuhoverfadeout 0.5s ease-in-out;     -moz-animation: menuhoverfadeout 0.5s ease-in-out;     -o-animation: menuhoverfadeout 0.5s ease-in-out;     animation: menuhoverfadeout 0.5s ease-in-out;     /* ... , on */ }

anyway,

i don't understand why bothering animation. after egzamining effect you're trying achieve, think simpler use transition:

-webkit-transition: opacity 500ms ease-in-out; -moz-transition: opacity 500ms ease-in-out; -ms-transition: opacity 500ms ease-in-out; -o-transition: opacity 500ms ease-in-out; transition: opacity 500ms ease-in-out;

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