很棒的CSS动画汉堡包菜单

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html

css

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html

css

body{
    padding:0px;
    margin:0px;
    width:100%;
    height:100vh;
    background: radial-gradient(#B53471, #6F1E51);
}
.wrapper{
    width:100px;
    height:100px;
    position: absolute;
    left:50%;
    top:50%;
    transform: translate(-50%, -50%);
}
.nav{
    width:64px;
    height:64px;
    position: absolute;
    left:50%;
    top:50%;
    transform: translate(-50%, -50%);
    padding: 0px;
    background-color:transparent;
    border-style:none;
    outline: none;
    cursor: pointer;
}
.nav span{
    width:100%;
    height:5px;
    background-color:#fff;
    display:block;
    position: absolute;
    border-radius: 2px;
    transition: all .5s ease;
}
.nav span:nth-child(1){
    top:0px;
    left:0px;
}
.nav span:nth-child(2){
    top:20px;
    right:0px;
}
.nav span:nth-child(3){
    top:40px;
    left:0px;
}

.nav.open span:nth-child(2){
    animation: span2 1.5s forwards cubic-bezier(.8, .5, .2, 1.4);
}
@keyframes span2{
    0%{
        transform: translate(0,0) scale(1);
    }
    20%{
        width:5px;
        border-radius: 50%;
        transform: translate(0,0) scale(1);
    }
    40%{
        width:5px;
        border-radius: 50%;
        transform: translate(0,0) scale(1);
    }
    50%{
        width:5px;
        border-radius: 50%;
        transform: translate(0,18px) scale(1); 
    }
    80%{
        width:5px;
        border-radius: 50%;
        transform: translate(0,-16px) scale(1);
    }
    100%{
        width:5px;
        border-radius: 50%;
        transform: translate(0,100px) scale(0);
    }
}
.nav.open span:nth-child(3){
    animation: span3 .8s forwards cubic-bezier(.8, .5, .2, 1.4);
    animation-delay: .7s;
}
@keyframes span3{
    0%{
        transform: translate(0,0);
    }
    60%{
        transform: rotate(80deg) translate(-7px, -7px);
    }
    100%{
        transform: rotate(45deg) translate(-7px, -7px);
    }
}

.nav.open span:nth-child(1){
    animation: span1 .8s forwards cubic-bezier(.8, .5, .2, 1.4);
    animation-delay: 1.1s;
}

@keyframes span1{
    0%{
        transform: translate(0,0);
    }
    60%{
        transform: rotate(-110deg) translate(-7px, -7px);
    }
    100%{
        transform: rotate(-45deg) translate(-20px, 20px);
    }
}
    
.nav span:nth-child(1){
    animation: span1_close .8s forwards cubic-bezier(.8, .5, .2, 1.4);
}
@keyframes span1_close {
    0%{
        transform: rotate(-45deg) translate(-20px, 20px);
    }
    100%{
        transform: rotate(0deg) translate(0, 0);
    }
}
.nav span:nth-child(2){
    animation: span2_close .8s forwards cubic-bezier(.8, .5, .2, 1.4);
}

@keyframes span2_close{
    0%{
        transform: translate(0, 40px) scale(0);
    }
    100%{
        transform: translate(0, 0) scale(1);
    }
}

.nav span:nth-child(3){
    animation: span3_close .8s forwards cubic-bezier(.8, .5, .2, 1.4);

}
@keyframes span3_close{
    0%{
        transform: rotate(45deg) translate(-7px, -7px);
    }
    100%{
        transform: rotate(0deg) translate(0, 0);
    }
}

JavaScript

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