html - Perspective 3D animation flickering in Firefox -


i'm trying create 3d css effect of door swinging opening , shutting. have codepen animation work it:

http://codepen.io/caleuanhopkins/pen/dslpv

here's css:

.frame--realistic {   perspective: 20em; }  .door { height: inherit; background: darksalmon; }  .frame { margin: .5em auto; border: solid 1em saddlebrown; width: 500px; height: 6.5em; }  .door--open { -webkit-transform-origin: 0 0 /*whatever y value wish*/; -moz-transform-origin: 0 0 /*whatever y value wish*/; -ms-transform-origin: 0 0 /*whatever y value wish*/; -o-transform-origin: 0 0 /*whatever y value wish*/; transform-origin: 0 0 /*whatever y value wish*/; -webkit-transform: rotatey(-45deg); -moz-transform: rotatey(-45deg); -ms-transform: rotatey(-45deg); -o-transform: rotatey(-45deg); transform: rotatey(-45deg); }  @-webkit-keyframes doorani {   {  -webkit-transform: rotatey(0deg);   }   {  -webkit-transform: rotatey(20deg);   } }   .frame:hover .door--ani { -webkit-transform-origin: 0 0; -moz-transform-origin: 0 0; -ms-transform-origin: 0 0; -o-transform-origin: 0 0; transform-origin: 0 0; -moz-animation: doorani 1s 1 normal forwards; -webkit-animation: doorani 1s 1 normal forwards; -ms-animation: doorani 1s 1 normal forwards; -o-animation: doorani 1s 1 normal forwards; animation: doorani 1s 1 normal forwards; }  @-webkit-keyframes doorout {   {  -webkit-transform: rotatey(20deg);   }   {  -webkit-transform: rotatey(0deg);   } }  @keyframes doorani {   {  -moz-transform: rotatey(0deg); -ms-transform: rotatey(0deg); -o-transform: rotatey(0deg); transform: rotatey(0deg);   }   {  -moz-transform: rotatey(20deg); -ms-transform: rotatey(20deg); -o-transform: rotatey(20deg); transform: rotatey(20deg);   } }  @keyframes doorout {   {  -moz-transform: rotatey(20deg); -ms-transform: rotatey(20deg); -o-transform: rotatey(20deg); transform: rotatey(20deg);   }   {  -moz-transform: rotatey(0deg); -ms-transform: rotatey(0deg); -o-transform: rotatey(0deg); transform: rotatey(0deg);   } }  .door--ani { -webkit-transform-origin: 0 0; -moz-transform-origin: 0 0; -ms-transform-origin: 0 0; -o-transform-origin: 0 0; transform-origin: 0 0; -moz-animation: doorout 1s 1 normal forwards; -webkit-animation: doorout 1s 1 normal forwards; -ms-animation: doorout 1s 1 normal forwards; -o-animation: doorout 1s 1 normal forwards; animation: doorout 1s 1 normal forwards; }

and html:

<div class='container'>   <div class='frame frame--realistic'>     <div class='door door--ani'> </div>   </div> </div>

however, main issue when door swings after have hovered on door. there slight flicker before animation finishes. have idea why doing , if there's can change/add fix issue?

update: code not running webkit browsers, have updated code issues of flickering still appears in firefox.


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