Pulse effect with CSS box-shadow by using jQuery

Question

I am trying to create pulse effect with css box-shadow by using jquery. I tried following code but completely failed. What i am trying to achieve is a smooth pulse effect with box-shadow

The code that i tried is html

<div class="one">
</div>

css

.one {
    width: 100px;
    height: 100px;
    background: red;
    -webkit-box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);
    -moz-box-shadow:    -1px -1px 5px rgba(50, 50, 50, 0.75);
    box-shadow:         -1px -1px 5px rgba(50, 50, 50, 0.75);
}
.two {
    width: 100px;
    height: 100px;
    background: red;
    -webkit-box-shadow: -1px -1px 13px rgba(50, 50, 50, 0.75);
    -moz-box-shadow:    -1px -1px 13px rgba(50, 50, 50, 0.75);
    box-shadow:         -1px -1px 13px rgba(50, 50, 50, 0.75);
}

jquery

$("div").setInterval(function() {
   $(this).toggleClass(".two");
}, 1000);

fiddle http://jsfiddle.net/KXp4D/2/

Answer 1

Pure CSS Example JSFIDDLE

@-webkit-keyframes shadow {
    0% {box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);}
    50% {box-shadow: -1px -1px 13px rgba(50, 50, 50, 0.75);}
    100% {box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);}
}
@-moz-keyframes shadow {
    0% {box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);}
    50% {box-shadow: -1px -1px 13px rgba(50, 50, 50, 0.75);}
    100% {box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);}
}
@keyframes shadow {
    0% {box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);}
    50% {box-shadow: -1px -1px 13px rgba(50, 50, 50, 0.75);}
    100% {box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);}
}

.one {
    width: 100px;
    height: 100px;
    margin: 10px;
    background: red;
    box-shadow: -1px -1px 5px rgba(50, 50, 50, 0.75);
}
.one:hover {
    -webkit-animation: shadow 1s ease-in-out infinite;
    -moz-animation: shadow 1s ease-in-out infinite;
    animation: shadow 1s ease-in-out infinite;
}