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HTML

              
                <button class="switch">
    <div class="inner">
        <div class="shine"></div>
    </div>
</button>

<svg width="0" height="0">
    <defs>
        <clipPath id="shape">
            <path d="M120 60C120 69.6429 119.357 79.2857 118.393 87.6429C116.786 104.036 104.036 116.786 87.75 118.393C79.2857 119.357 69.6429 120 60 120C50.3571 120 40.7143 119.357 32.3571 118.393C15.9643 116.786 3.32143 104.036 1.60714 87.6429C0.642857 79.2857 0 69.6429 0 60C0 50.3571 0.642857 40.7143 1.60714 32.25C3.32143 15.9643 15.9643 3.21429 32.3571 1.60714C40.7143 0.642857 50.3571 0 60 0C69.6429 0 79.2857 0.642857 87.75 1.60714C104.036 3.21429 116.786 15.9643 118.393 32.25C119.357 40.7143 120 50.3571 120 60Z" />
        </clipPath>
        <clipPath id="shape-outer">
            <path d="M124 62C124 71.9643 123.336 81.9286 122.339 90.5643C120.679 107.504 107.504 120.679 90.675 122.339C81.9286 123.336 71.9643 124 62 124C52.0357 124 42.0714 123.336 33.4357 122.339C16.4964 120.679 3.43214 107.504 1.66071 90.5643C0.664286 81.9286 0 71.9643 0 62C0 52.0357 0.664286 42.0714 1.66071 33.325C3.43214 16.4964 16.4964 3.32143 33.4357 1.66071C42.0714 0.664286 52.0357 0 62 0C71.9643 0 81.9286 0.664286 90.675 1.66071C107.504 3.32143 120.679 16.4964 122.339 33.325C123.336 42.0714 124 52.0357 124 62Z" />
        </clipPath>
    </defs>
</svg>
              
            
!

CSS

              
                .switch {
    --c-background-top: #75757D;
    --c-background-bottom: #45454C;
    --c-background-top-shadow: rgba(255, 255, 255, .45);
    --c-background-bottom-shadow: rgba(0, 0, 0, .3);
    --c-stroke-top: #262626;
    --c-stroke-bottom: #3D3D43;
    --c-inner: #6D6D6D;
    --c-inner-top-shadow: rgba(0, 0, 0, .3);
    --c-inner-bottom-shadow: rgba(255, 255, 255, .18);
    --c-inner-inset-shadow: rgba(0, 0, 0, .14);
    --c-knob-stroke-top: #515151;
    --c-knob-stroke-bottom: #acacac;
    --c-knob-inner-top: #8A8A8A;
    --c-knob-inner-middle-top: #A1A1A1;
    --c-knob-inner-middle-bottom: #B4B4B4;
    --c-knob-inner-bottom: #BABABA;
    --c-knob-inner-shadow-top: rgba(255, 255, 255, .25);
    --c-knob-inner-shadow-bottom: rgba(0, 0, 0, .3);
    --c-knob-shadow-1: #{rgba(#070725, .16)};

    --knob-inner-shadow-top-y: 2.5px;
    --knob-inner-shadow-bottom-y: -5.5px;
    --knob-shadow-1-y: 20px;
    --knob-shadow-1-blur: 20px;
    --knob-shadow-1-spread: 0;
    --knob-shadow-2-y: 12.5px;
    --knob-shadow-2-blur: 8.5px;
    --knob-shadow-3-y: 6.5px;
    --knob-shadow-3-blur: 4.5px;
    --knob-shadow-4-y: 4px;
    --knob-shadow-4-blur: 2.5px;
    --knob-shadow-7-y: 15px;
    --top-shadow-blur: 5px;
    --inner-bottom-shadow-blur: 1.25px;
    --shine-top-opacity: 0;
    --shine-top-y: -5px;
    --shine-bottom-opacity: 1;
    --shine-bottom-y: 0px;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
    border: none;
    background: none;
    padding: 0;
    margin: 0;
    outline: none;
    position: relative;
    cursor: pointer;
    border-radius: 36px;
    box-shadow: 0 4px 2.5px rgba(#000, .0525), 0 8px 4.5px rgba(#000, .065), 0 12px 8px rgba(#000, .17), 0 22.5px 14.5px rgba(#000, .07), 0 35px 25px rgba(#000, .08), 0 20px 15px rgba(#000, .05);
    &.active {
        --c-background-top: #F0F0F0;
        --c-background-bottom: #E9E9E9;
        --c-background-top-shadow: #fff;
        --c-background-bottom-shadow: rgba(0, 0, 0, .18);
        --c-stroke-top: #E7E7E7;
        --c-stroke-bottom: #D0D0D0;
        --c-inner: #EAEAEA;
        --c-inner-top-shadow: #{rgba(#9C3800, .42)};
        --c-inner-bottom-shadow: #FFF3E5;
        --c-inner-inset-shadow: rgba(0, 0, 0, .2);
        --c-knob-stroke-top: #cc4528;
        --c-knob-stroke-bottom: #f05f21;
        --c-knob-inner-top: #E94714;
        --c-knob-inner-middle-top: #E85617;
        --c-knob-inner-middle-bottom: #FF7324;
        --c-knob-inner-bottom: #FF844F;
        --c-knob-inner-shadow-top: #{rgba(#FFAA6D, .45)};
        --c-knob-inner-shadow-bottom: #{rgba(#F42C00, .9)};
        --c-knob-shadow-1: #{rgba(#FFB4AF, .7)};

        --knob-inner-shadow-top-y: 5.5px;
        --knob-inner-shadow-bottom-y: -1.5px;
        --knob-shadow-1-y: 0;
        --knob-shadow-1-blur: 2px;
        --knob-shadow-1-spread: 5px;
        --knob-shadow-2-y: 6.5px;
        --knob-shadow-2-blur: 4.5px;
        --knob-shadow-3-y: 3.5px;
        --knob-shadow-3-blur: 2.5px;
        --knob-shadow-4-y: 2px;
        --knob-shadow-4-blur: 1.5px;
        --knob-shadow-7-y: 5px;
        --top-shadow-blur: 3px;
        --inner-bottom-shadow-blur: 1px;
        --shine-top-opacity: 1;
        --shine-top-y: 0px;
        --shine-bottom-opacity: 0;
        --shine-bottom-y: 5px;
    }
    &:before,
    &:after {
        content: '';
        display: block;
        width: var(--size, 120px);
        height: var(--size, 120px);
        clip-path: url(#shape);
    }
    &:before {
        --size: 124px;
        background: linear-gradient(var(--c-stroke-top), var(--c-stroke-bottom));
        position: absolute;
        left: -2px;
        top: -2px;
        clip-path: url(#shape-outer);
    }
    &:after {
        box-shadow: inset 0 3px var(--top-shadow-blur) var(--c-background-top-shadow), inset 0 -5px 5px var(--c-background-bottom-shadow);
        background: linear-gradient(var(--c-background-top), var(--c-background-bottom));
        border-radius: 36px;
    }
    .inner {
        width: 40px;
        height: 60px;
        padding: 5px;
        border-radius: 12.5px;
        position: absolute;
        left: 40px;
        top: 30px;
        z-index: 1;
        background: var(--c-inner);
        box-shadow: 0 -1.5px 1.5px var(--c-inner-top-shadow), 0 1.5px var(--inner-bottom-shadow-blur) var(--c-inner-bottom-shadow), inset 0 5px 14px var(--c-inner-inset-shadow);
        &:before,
        &:after {
            content: '';
            display: block;
        }
        &:before {
            width: 30px;
            height: 50px;
            border-radius: 9px;
            background: linear-gradient(var(--c-knob-stroke-top), var(--c-knob-stroke-bottom));
            box-shadow: 0 var(--knob-shadow-1-y) var(--knob-shadow-1-blur) var(--knob-shadow-1-spread) var(--c-knob-shadow-1), 0 var(--knob-shadow-2-y) var(--knob-shadow-2-blur) rgba(#070725, .07), 0 var(--knob-shadow-3-y) var(--knob-shadow-3-blur) rgba(#070725, .13), 0 var(--knob-shadow-4-y) var(--knob-shadow-4-blur) rgba(#070725, .11), 0 2px 1.5px rgba(#070725, .09), 0 .85px .5px rgba(#070725, .05), 0 var(--knob-shadow-7-y) 15px rgba(#000, .25);
        }
        &:after {
            width: 28px;
            height: 48px;
            border-radius: 8.5px;
            position: absolute;
            left: 6px;
            top: 6px;
            background: linear-gradient(var(--c-knob-inner-top), var(--c-knob-inner-middle-top), var(--c-knob-inner-middle-bottom), var(--c-knob-inner-bottom));
            box-shadow: inset 0 var(--knob-inner-shadow-top-y) 1.5px var(--c-knob-inner-shadow-top), inset 0 var(--knob-inner-shadow-bottom-y) 1.25px var(--c-knob-inner-shadow-bottom);
        }
        .shine {
            position: absolute;
            left: 6px;
            right: 6px;
            top: 0;
            bottom: 0;
            z-index: 1;
            border-left: 1px solid;
            border-right: 1px solid;
            border-image: linear-gradient(rgba(#000, 0) 30%, rgba(#000, .1), rgba(#000, 0) 70%) 1 100%;
            &:before,
            &:after {
                content: '';
                position: absolute;
                left: -1px;
                right: -1px;
                height: 9px;
                -webkit-mask-image: linear-gradient(to left, transparent 0%, black 14px, black 50%, black calc(100% - 14px), transparent 100%);
                mask-image: linear-gradient(to left, transparent 0%, black 14px, black 50%, black calc(100% - 14px), transparent 100%);
            }
            &:before {
                border-radius: 11px 11px 0 0;
                border-top: 1px solid #fff;
                top: 11px;
                opacity: var(--shine-top-opacity);
                transform: translateY(var(--shine-top-y));
            }
            &:after {
                border-radius: 0 0 11px 11px;
                border-bottom: 1px solid #fff;
                bottom: 11px;
                opacity: var(--shine-bottom-opacity);
                transform: translateY(var(--shine-bottom-y));
            }
        }
    }
}

.hint {
    width: 228px;
    font-size: 16px;
    line-height: 1.65;
    font-weight: 500;
    position: absolute;
    left: 50%;
    top: 50%;
    color: #93939F;
    white-space: nowrap;
    text-align: center;
    transform: translate(-50%, 100px);
    animation: show .35s linear forwards;
    a {
        display: inline-block;
        position: relative;
        text-decoration: none;
        color: #1ca2f1;
        svg {
            width: 71px;
            height: 38px;
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translate(-50%, 5px) translateZ(0);
            fill: none;
            stroke: #1ca2f1;
            stroke-linecap: round;
            stroke-width: 2px;
            stroke-dasharray: var(--offset, 69px) 278px;
            stroke-dashoffset: 361px;
            transition: stroke .25s ease var(--stroke-delay, 0s), stroke-dasharray .35s;
        }
        &:hover {
            --stroke-delay: .1s;
            --offset: 180px;
        }
    }
}

@keyframes show {
    from {
        opacity: 0;
    }
}

html {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

* {
    box-sizing: inherit;
    &:before,
    &:after {
        box-sizing: inherit;
    }
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #27272B;
    font-family: 'Inter', Arial, sans-serif;
    transition: background .15s cubic-bezier(.532, 0, .924, .862);
    &.active {
        background: #F6F6F6;
    }
}
              
            
!

JS

              
                document.querySelectorAll('.switch').forEach(elem => {
    elem.addEventListener('click', e => {
        let active = elem.classList.contains('active')
        gsap.to(elem, {
            '--c-background-top': active ? '#75757D' : '#F0F0F0',
            '--c-background-bottom': active ? '#45454C' : '#E9E9E9',
            '--c-background-top-shadow': active ? 'rgba(255, 255, 255, .45)' : '#fff',
            '--c-background-bottom-shadow': active ? 'rgba(0, 0, 0, .3)' : 'rgba(0, 0, 0, .18)',
            '--c-stroke-top': active ? '#262626' : '#E7E7E7',
            '--c-stroke-bottom': active ? '#3D3D43' : '#D0D0D0',
            '--c-inner': active ? '#6D6D6D' : '#EAEAEA',
            '--c-inner-top-shadow': active ? 'rgba(0, 0, 0, .3)' : 'rgba(156, 56, 0, .42)',
            '--c-inner-bottom-shadow': active ? 'rgba(255, 255, 255, .18)' : '#FFF3E5',
            '--c-inner-inset-shadow': active ? 'rgba(0, 0, 0, .14)' : 'rgba(0, 0, 0, .2)',
            '--c-knob-stroke-top': active ? '#515151' : '#cc4528',
            '--c-knob-stroke-bottom': active ? '#acacac' : '#f05f21',
            '--c-knob-inner-top': active ? '#8A8A8A' : '#E94714',
            '--c-knob-inner-middle-top': active ? '#A1A1A1' : '#E85617',
            '--c-knob-inner-middle-bottom': active ? '#B4B4B4' : '#FF7324',
            '--c-knob-inner-bottom': active ? '#BABABA' : '#FF844F',
            '--c-knob-inner-shadow-top': active ? 'rgba(255, 255, 255, .25)' : 'rgba(255, 170, 109, .44)',
            '--c-knob-inner-shadow-bottom': active ? 'rgba(0, 0, 0, .3)' : 'rgba(244, 44, 0, .9)',
            '--c-knob-shadow-1': active ? 'rgba( 7, 7, 37, .16)' : 'rgba(255, 180, 175, .7)',

            '--shine-top-y': active ? '-5px' : '0px',
            '--shine-bottom-y': active ? '0px' : '5px',
            '--knob-inner-shadow-top-y': active ? '2.5px' : '5.5px',
            '--knob-inner-shadow-bottom-y': active ? '-5.5px' : '-1.5px',
            '--knob-shadow-1-y': active ? '20px' : '0px',
            '--knob-shadow-1-blur': active ? '20px' : '2px',
            '--knob-shadow-1-spread': active ? '0px' : '5px',
            '--knob-shadow-2-y': active ? '12.5px' : '6.5px',
            '--knob-shadow-2-blur': active ? '8.5px' : '4.5px',
            '--knob-shadow-3-y': active ? '6.5px' : '3.5px',
            '--knob-shadow-3-blur': active ? '4.5px' : '2.5px',
            '--knob-shadow-4-y': active ? '4px' : '2px',
            '--knob-shadow-4-blur': active ? '2.5px' : '1.5px',
            '--knob-shadow-7-y': active ? '15px' : '5px',
            '--top-shadow-blur': active ? '5px' : '3px',
            '--inner-bottom-shadow-blur': active ? '1.25px' : '1px',
            '--shine-top-opacity': active ? 0 : 1,
            '--shine-bottom-opacity': active ? 1 : 0,
            duration: .15,
            ease: 'power1.in',
            onStart() {
                (new Audio('https://assets.codepen.io/165585/switch.mp3')).play()
                elem.dataset.c = (parseInt(elem.dataset.c) || 0) + 1
                if(parseInt(elem.dataset.c) == 7) {
                    let hint = document.createElement('div')
                    hint.innerHTML = 'You can’t get enough?<br>Follow our journey on <a href="https://twitter.com/joincheck" target="_top">Twitter<svg viewBox="0 0 70 36"><path d="M6.9739 30.8153H63.0244C65.5269 30.8152 75.5358 -3.68471 35.4998 2.81531C-16.1598 11.2025 0.894099 33.9766 26.9922 34.3153C104.062 35.3153 54.5169 -6.68469 23.489 9.31527" /></svg></a>'
                    hint.classList.add('hint')
                    document.querySelector('body').appendChild(hint)
                }
                
            },
            onComplete() {
                elem.classList.toggle('active')
            }
        })
        document.querySelector('body').classList.toggle('active')
    })
})

              
            
!
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