CSS animation forwards and then backwards

animation, css

Solution

I take back what I said in my comment above. Looks like it is possible to do this with plain CSS, after all... The trick is to use transition delays properly.

HTML

<a id="mobile-menu">
   <span></span>
</a>

CSS

body {
    margin: 20px;
}

#mobile-menu {
    display: block;
    position: relative;
    cursor: pointer; 
    width: 30px;
    padding: 6px 30px 9px 0; 
    box-sizing: border-box;
}

#mobile-menu span, 
#mobile-menu span:before, 
#mobile-menu span:after {
    height: 3px;
    width: 30px;
    background: #000;
    display: block;
    content: "";
    position: absolute;
    left: 50%;
    margin-left: -15px;
}

#mobile-menu span {
    transition: background-color .3s ease .3s;
    -webkit-transition: background-color .3s ease .3s;
}

#mobile-menu span:before {
    top: -6px;
    transition: top .2s ease .2s, transform .2s ease;
    -webkit-transition: top .2s ease .2s, -webkit-transform .2s ease;
}

#mobile-menu span:after {
    bottom: -6px;
    transition: bottom .2s ease .2s, transform .2s ease;
    -webkit-transition: bottom .2s ease .2s, -webkit-transform .2s ease;
}

#mobile-menu.active span {
    background-color: transparent;
    transition: background-color .3s ease;
    -webkit-transition: background-color .3s ease;
}

#mobile-menu.active span:before {
    top: 0;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
    transition: top .2s ease .1s, transform .2s ease .3s;
    -webkit-transition: top .2s ease .1s, -webkit-transform .2s ease .3s;
}

#mobile-menu.active span:after {
    bottom: 0;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
    transition: bottom .2s ease .1s, transform .2s ease .3s;
    -webkit-transition: bottom .2s ease .1s, -webkit-transform .2s ease .3s;
}

jQuery

$(function() {
    $("#mobile-menu").click(function(){
        $("#mobile-menu").toggleClass("active");
    });
})

Online Demo

Problem

I'm trying to create a CSS animation that when the user clicks the burger menu it transforms to an x (step 1), then when the user clicks it again it animates back to the burger menu (step 2). Step 1 works but I don’t know how to reverse the animation. Thanks for your help! http://jsfiddle.net/aX6Cf/ HTML ``` <a id="mobile-menu"> <span></span> </a> ``` CSS ``` @-webkit-keyframes rotate-plus { from { -webkit-transform:rotate(0deg); } to { -webkit-transform:rotate(45deg); } } @-webkit-keyframes rotate-minus { from { -webkit-transform:rotate(0deg); } to { -webkit-transform:rotate(-45deg); } } @-webkit-keyframes transition-1 { from { top: -6; transition: all .2s ease-out; } to { top: 0; transition: all .2s ease-out; } } @-webkit-keyframes transition-2 { from { bottom: -6; transition: all .2s ease-out; } to { bottom: 0; transition: all .2s ease-out; } } body { margin: 20px; } #mobile-menu { display: block; position: relative; cursor: pointer; width: 30px; padding: 6px 30px 9px 0; box-sizing: border-box; } #mobile-menu span, #mobile-menu span:before, #mobile-menu span:after { height: 3px; width: 30px; background: #000; display: block; content: ""; position: absolute; left: 50%; margin-left: -15px; } #mobile-menu span:before { top: -6px; } #mobile-menu span:after { bottom: -6px; } #mobile-menu.active span { background-color: transparent; } #mobile-menu.active span:before { -webkit-animation: rotate-plus .05s ease-out .1s forwards, transition-1 .05s ease-out forwards; animation: rotate-plus .05s ease-out .1s forwards, transition-1 .05s ease-out forwards; } #mobile-menu.active span:after { -webkit-animation: rotate-minus .05s ease-out .1s forwards, transition-2 .05s ease-out forwards; animation: rotate-minus .05s ease-out .1s forwards, transition-2 .05s ease-out forwards; } ``` jQuery ``` $("#mobile-menu").click(function(){ $("#mobile-menu").toggleClass("active"); }); ```

Original source