Backdrop Filters

<header class="Header">
    <div>
      <input id="FilterBlur" name="FilterBlur" type="checkbox" data-filter-name="blur" checked>
      <label for="FilterBlur">Blur</label>
    </div>
    <div>
      <input id="FilterBrightness" name="FilterBrightness" type="checkbox" data-filter-name="brightness"/>
      <label for="FilterBrightness">Brightness</label>
    </div>
    <div>
      <input id="FilterContrast" name="FilterContrast" type="checkbox" data-filter-name="contrast"/>
      <label for="FilterContrast">Contrast</label>
    </div>
    <div>
      <input id="FilterGrayscale" name="FilterGrayscale" type="checkbox" data-filter-name="grayscale"/>
      <label for="FilterGrayscale">Grayscale</label>
    </div>
    <div>
      <input id="FilterHueRotate" name="FilterHueRotate" type="checkbox" data-filter-name="hue-rotate"/>
      <label for="FilterHueRotate">Hue-rotate</label>
    </div>
    <div>
      <input id="FilterSaturate" name="FilterSaturate" type="checkbox" data-filter-name="saturate"/>
      <label for="FilterSaturate">Saturate</label>
    </div>
    <div>
      <input id="FilterInvert" name="FilterInvert" type="checkbox" data-filter-name="invert"/>
      <label for="FilterInvert">Invert</label>
    </div>
  </header>
  <main>
  <div class="Container">
    <div class="Filter" data-filter-name="blur">
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="blur">Blur</label>
        <input type="range" id="blur" name="blur"
           value="10" min="0" max="100" />
      </div>
    </div>
    <div class="Filter" data-filter-name="brightness" hidden>
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="brightness">Brightness</label>
        <input type="range" id="brightness" name="brightness"
           value="60" min="0" max="200" />
      </div>
    </div>
    <div class="Filter" data-filter-name="contrast" hidden>
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="contrast">Contrast</label>
        <input type="range" id="contrast" name="contrast"
           value="60" min="0" max="200" />
      </div>
    </div>
    <div class="Filter" data-filter-name="grayscale" hidden>
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="grayscale">Grayscale</label>
        <input type="range" id="grayscale" name="grayscale"
           value="30" min="0" max="100" />
      </div>
    </div>
    <div class="Filter" data-filter-name="hue-rotate" hidden>
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="hue-rotate">Hue-rotate</label>
        <input type="range" id="hue-rotate" name="hue-rotate"
           value="30" min="0" max="360" />
      </div>
    </div>
    <div class="Filter" data-filter-name="saturate" hidden>
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="saturate">Saturate</label>
        <input type="range" id="saturate" name="saturate"
           value="30" min="0" max="100" />
      </div>
    </div>
    <div class="Filter" data-filter-name="invert" hidden>
      <div class="Filter-lens"></div>
      <div class="Filter-content">
        <label class="Filter-name" for="invert">Invert</label>
        <input type="range" id="invert" name="invert"
           value="100" min="0" max="100" />
      </div>
    </div>
  </div>
 
  </main>

/* --------------------- */
/* Filters ✨✨✨        */
/* --------------------- */

:root {
	--filter-blur: 10px;
	--filter-brightness: 60%;
	--filter-contrast: 60%;
	--filter-grayscale: 30%;
	--filter-hue-rotate: 30%;
	--filter-saturate: 30%;
	--filter-invert: 100%;
  }
  
  .Filter[data-filter-name="blur"] .Filter-lens {
	backdrop-filter: blur(var(--filter-blur));
  }
  
  .Filter[data-filter-name="brightness"] .Filter-lens {
	backdrop-filter: brightness(var(--filter-brightness));
  }
  
  .Filter[data-filter-name="contrast"] .Filter-lens {
	backdrop-filter: contrast(var(--filter-contrast));
  }
  
  .Filter[data-filter-name="grayscale"] .Filter-lens {
	backdrop-filter: grayscale(var(--filter-grayscale));
  }
  
  .Filter[data-filter-name="hue-rotate"] .Filter-lens {
	backdrop-filter: hue-rotate(var(--filter-hue-rotate));
  }
  
  .Filter[data-filter-name="saturate"] .Filter-lens {
	backdrop-filter: saturate(var(--filter-saturate));
  }
  
  .Filter[data-filter-name="invert"] .Filter-lens {
	backdrop-filter: invert(var(--filter-invert));
  }
  
  /* --------------------- */
  /* Global style          */
  /* --------------------- */
  
  body::before {
	content: "";
	position: fixed;
	z-index: -1;
	inset: 0;
	background-image: url('https://cdn.pixabay.com/photo/2023/05/03/11/20/bird-7967356_1280.jpg');
	background-size: cover;
	background-position: center center;
  }
  
  .Header {
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	padding: 12px 24px;
	border-bottom: 1px solid #fff;
	font-weight: 700;
	color: #fff;
	backdrop-filter: blur(10px) brightness(60%);
  }
  
  .Container {
	position: absolute;
	top: 50%;
	left: 50%;
  }
  
  .Filter {
	display: inline-block;
	position: absolute;
	top: 0;
	left: 0;
	border: 5px solid #fff;
	border-radius: 3px;
	box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
	transform: translate(-50%, -50%);
	user-select: none;
  }
  
  .Filter[hidden] {
	display: none;
  }
  
  .Filter-lens {
	content: "";
	display: block;
	width: 100%;
	aspect-ratio: 1/1;
	cursor: pointer;
  }
  
  .Filter-content {
	display: flex;
	align-items: center;
	justify-content: center;
	position: relative;
	width: 300px;
	height: 70px;
	padding: 12px 24px;
	background: #fff;
	font-size: 1.5rem;
	text-align: center;
  }
  
  .Filter-name {
	position: absolute;
	top: 0;
	left: 5px;
	border-radius: 5px;
	padding: 2px 8px;
	background: linear-gradient(-25deg, #4affd3, #4a00d3);
	color: #fff;
	font-size: 1rem;
	font-weight: 700;
	transform: translateY(-50%);
  }
  
  .Filter input {
	width: 100%;
	cursor: pointer;
  }
  
  /* --------------------- */
  /* Other styles          */
  /* --------------------- */
  
  * {
	box-sizing: border-box;
  }
  
  body {
	margin: 0;
	font-family: 'Poppins', sans-serif;
	overflow: hidden;
  }
  
  .Me {
	position: fixed;
	z-index: 10;
	bottom: 20px;
	left: 50%;
	color: #000;
	transform: translateX(-50%);
	font-weight: 700;
	opacity: .5;
  } 

const rootElement = document.querySelector(':root');
const filters = document.querySelectorAll('.Filter');
const filterTrigger = document.querySelectorAll('.Header input');
let filterZIndex = 0;
let previousTouch = undefined;

function updateElementPosition(element, event) {
  let movementX, movementY;

  if (event.type === 'touchmove') {
    const touch = event.touches[0];
    movementX = previousTouch ? touch.clientX - previousTouch.clientX : 0;
    movementY = previousTouch ? touch.clientY - previousTouch.clientY : 0;
    console.log('touch', { movementX: movementX, newX: touch.clientX, oldX: previousTouch && previousTouch.clientX });
    previousTouch = touch;
  } else {
    movementX = event.movementX;
    movementY = event.movementY;
  }
  
  const elementY = parseInt(element.style.top || 0) + movementY;
  const elementX = parseInt(element.style.left|| 0) + movementX;

  element.style.top = elementY + "px";
  element.style.left = elementX + "px";
}

function startDrag(element, event) {
  updateZIndex(element);
  const updateFunction = (event) => updateElementPosition(element, event);
  const stopFunction = () => stopDrag({update: updateFunction, stop: stopFunction});
  document.addEventListener("mousemove", updateFunction);
  document.addEventListener("touchmove", updateFunction);
  document.addEventListener("mouseup", stopFunction);
  document.addEventListener("touchend", stopFunction);
}

function stopDrag(functions) {
  previousTouch = undefined;
  document.removeEventListener("mousemove", functions.update);
  document.removeEventListener("touchmove", functions.update);
  document.removeEventListener("mouseup", functions.stop);
  document.removeEventListener("touchend", functions.stop);
}

function updateZIndex(element) {
  element.style.zIndex = filterZIndex;
  filterZIndex++;
}

function inputHandler(event) {
  const unit = event.target.name === 'blur' ? 'px' :
               event.target.name === 'hue-rotate' ? 'deg' : '%';
  const value = `${event.target.value}${unit}`;
  rootElement.style.setProperty(`--filter-${event.target.name}`, value);
}

filterTrigger.forEach(trigger => {
  trigger.addEventListener('change', (event) => {
    const filter = document.querySelector(`.Filter[data-filter-name="${event.target.dataset.filterName}"]`);
    if (event.currentTarget.checked) {
      filter.removeAttribute("hidden");
      updateZIndex(filter);
    } else {
      filter.setAttribute("hidden", "");
    }
  })
});

filters.forEach(filter => {
  const inputElement = filter.querySelector('input');
  const lensElement = filter.querySelector('.Filter-lens');
  const startFunction = (event) => startDrag(filter, event);
  
  filter.style.top = `0px`;
  filter.style.left = `0px`;
  
  lensElement.addEventListener("mousedown", startFunction);
  lensElement.addEventListener("touchstart", startFunction);
  inputElement.addEventListener('input', inputHandler);
});