Elastic Toggle Switch

elastic-toggle-switch.markdown

Elastic Toggle Switch

A Pen by Chris Pennington on CodePen.

License.

index.html

 <div class="container">
    <div class="custom-check-wrapper">
      <input type="checkbox" id="setting1" role="switch">
      <div class="custom-check">
        <div class="custom-check-thumb"></div>
      </div>
      <label for="setting1">Enable Setting 1</label>
    </div>
    <div class="custom-check-wrapper">
      <input type="checkbox" id="setting2" role="switch">
      <div class="custom-check">
        <div class="custom-check-thumb"></div>
      </div>
      <label for="setting2">Enable Setting 2</label>
    </div>
  </div>

script.js

document.querySelectorAll('[role="switch"]').forEach((toggle) => {
	toggle.addEventListener("change", () => {
		const isChecked = toggle.checked;
		const thumb = toggle
			.closest(".custom-check-wrapper")
			.querySelector(".custom-check-thumb");
		thumb.style.animation = isChecked
			? "toggleOn 200ms cubic-bezier(0.4, 0, 0.6, 1) forwards"
			: "toggleOff 200ms cubic-bezier(0.4, 0, 0.6, 1) forwards";
	});
});

style.css

*, *::after, *::before {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:root {
  --hue: 260;
  --accent: var(--hue) 80% 40%;
  --muted: var(--hue) 20% 90%;
  --bkg: var(--hue) 30% 98%;
  --text: var(--hue) 80% 9%;

  --fs-400: 2.5rem;
  --toggleHeight: 1.5em;
}

body {
  background-color: hsl(var(--bkg));
  color: hsl(var(--text));
  font-size: var(--fs-400);
  font-family: 'Inter', sans-serif;
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.container {
  display: grid;
  gap: var(--fs-400);
}

.custom-check-wrapper {
  display: flex;
  align-items: center;
  gap: .75em;
  position: relative;
}

[role="switch"]{
  appearance: none;
  --webkit-appearance: none;
  position: absolute;
  inset: 0;
  cursor: pointer;
}

[role="switch"]:focus {
  outline: 2px solid transparent;
}

[role="switch"]:focus-visible + .custom-check {
  box-shadow:
    0 0 0 .15em hsl(var(--bkg)),
    0 0 0 .4em hsl(var(--accent));
}

.custom-check {
  width: calc(var(--toggleHeight) * 2);
  height: var(--toggleHeight);
  background-color: hsl(var(--muted));
  border-radius: 100vmax;
  position: relative;
  pointer-events: none;
  transition:
    background-color 400ms cubic-bezier(0.4, 0, 0.6, 1),
    box-shadow 80ms cubic-bezier(0.4, 0, 0.6, 1);
}

.custom-check-thumb {
  position: absolute;
  background-color: hsl(var(--bkg));
  border-radius: 100vmax;
  height: calc(var(--toggleHeight) * .834);
  width: calc(var(--toggleHeight) * .834);
  top: calc(var(--toggleHeight) * .084);
  left: calc(var(--toggleHeight) * .084);
}

[role="switch"]:checked + .custom-check {
  background-color: hsl(var(--accent));
}

@keyframes toggleOn {
  0% {
    width: calc(var(--toggleHeight) * .834);
  }

  40% {
    width: calc(var(--toggleHeight) * 1.4);
  }

  100% {
    width: calc(var(--toggleHeight) * .834);
    transform: translateX(var(--toggleHeight));
  }
}

@keyframes toggleOff {
  0% {
    width: calc(var(--toggleHeight) * .834);
    transform: translateX(var(--toggleHeight));
  }

  60% {
    width: calc(var(--toggleHeight) * 1.4);
  }

  100% {
    width: calc(var(--toggleHeight) * .834);
    transform: translateX(0);
  }
}