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html - CSS display none and opacity animation with keyframes not working

I have a very basic piece of HTML with the objective of animating from display: none; to display: block with opacity changing from 0 to 1.

I'm using Chrome browser, which uses the -webkit prefixes as preference and did a -webkit-keyframes transition set to make the animation possible. However, it does not work and just changes the display without fading.

I have a JSFiddle here.

<html>
    <head>
        <style type="text/css">
            #myDiv
                {
                display: none;
                opacity: 0;
                padding: 5px;
                color: #600;
                background-color: #CEC;
                -webkit-transition: 350ms display-none-transition;
                }

            #parent:hover>#myDiv
                {
                opacity: 1;
                display: block;
                }

            #parent
                {
                background-color: #000;
                color: #FFF;
                width: 500px;
                height: 500px;
                padding: 5px;
                }

            @-webkit-keyframes display-none-transition
                {
                0% {
                    display: none; 
                    opacity: 0;
                    }

                1% 
                    {
                    display: block; 
                    opacity: 0;
                    }

                100% 
                    {
                    display: block; 
                    opacity: 1;
                    }
                }
        </style>
        <body>
            <div id="parent">
                Hover on me...
                <div id="myDiv">
                    Hello!
                </div>
            </div>
        </body>
    </head>
</html>
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by (71.8m points)

The display doesn't work with CSS transition or animation.

Use opacity, visibility or z-index. You can combine all them.

Try to use visibility: visible in place display: block and visibility: hidden in place display: none.

And finally, combine z-index: -1 and z-index: 100 for example.

Good work ;)


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