CodePen Embed - 20. Custom cursor pop-up

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Using the top layer, we can put the cursor above everything else. If we need to display another pop-up, we can listen for the event and hide and reshow the cursor popup. Try showing a pop-up above it.\\n    </p>\\n    <div>\\n      <button class=\\\"button ripple\\\" popovertoggletarget=\\\"overlay-pop-up\\\">Show Pop-up</button>\\n    </div>\\n  </article>\\n</main>\\n<div id=\\\"overlay-pop-up\\\" popover>\\n  <div class=\\\"card elevated\\\">\\n    You can still see the cursor above me and my <code>::backdrop</code>!\\n  </div>\\n</div>\\n<canvas id=\\\"custom-cursor\\\" class=\\\"custom-cursor\\\" popover=\\\"manual\\\"></canvas>\",\"css\":\"@layer demo {\\n  #overlay-pop-up {\\n    border: 0;\\n    background: none;\\n    max-width: calc(100% - (2 * var(--size-4)));\\n    min-width: 0;\\n  }\\n\\n  #overlay-pop-up::backdrop {\\n    background: hsl(0 0% 0% / 0.25);\\n    backdrop-filter: blur(4px);\\n  }\\n\\n  #overlay-pop-up .card {\\n    padding: var(--size-4);\\n    display: block;\\n    min-width: 0;\\n    line-height: 1.5;\\n    background: var(--surface-1);\\n    color: var(--text-1);\\n  }\\n}\\n\\n@layer base {\\n  *,\\n  *:after,\\n  *:before {\\n    box-sizing: border-box;\\n    /*cursor: none;*/\\n  }\\n\\n  body {\\n    min-height: 100vh;\\n    background: var(--surface-1);\\n    display: block;\\n    font-family: \\\"Google Sans\\\", sans-serif, system-ui;\\n  }\\n\\n  :where([popover]) {\\n    margin: auto;\\n    border-width: 0;\\n    border-style: none;\\n    background: transparent;\\n  }\\n\\n  canvas {\\n    height: 100vh;\\n    width: 100vw;\\n    pointer-events: none;\\n    display: none;\\n    position: fixed;\\n  }\\n\\n  canvas:open {\\n    display: block;\\n  }\\n\\n  h1 {\\n    margin: 0;\\n    color: var(--gray-0);\\n  }\\n\\n  .button {\\n    /*cursor: none;*/\\n  }\\n\\n  header {\\n    height: 25vmin;\\n    min-height: 200px;\\n    background: var(--gradient-23);\\n    display: grid;\\n    place-items: center;\\n    color: var(--gray-0);\\n    padding: var(--size-4);\\n    grid-template-columns: 1fr;\\n  }\\n\\n  main {\\n    margin: 0 auto;\\n  }\\n\\n  article {\\n    padding: var(--size-4);\\n    display: flex;\\n    flex-direction: column;\\n    align-items: center;\\n  }\\n\\n  article > * + * {\\n    margin-top: var(--size-4);\\n  }\\n}\\n\",\"js\":\"const mapRange = (inputLower, inputUpper, outputLower, outputUpper) => {\\n  const INPUT_RANGE = inputUpper - inputLower;\\n  const OUTPUT_RANGE = outputUpper - outputLower;\\n  return (value) =>\\n    outputLower + (((value - inputLower) / INPUT_RANGE) * OUTPUT_RANGE || 0);\\n};\\n\\nconst clamp = (min, max, value) => Math.min(Math.max(value, min), max);\\n\\nlet canvas;\\nlet context;\\nconst blocks = [];\\n\\nconst createBlock = ({ x, y, movementX, movementY }) => {\\n  const inactiveBlocks = blocks.filter((block) => block.active === false);\\n  const size = Math.floor(\\n    mapRange(0, 100, 10, 50)(Math.max(Math.abs(movementX), Math.abs(movementY)))\\n  );\\n  if (inactiveBlocks.length !== 0) {\\n    // Reuse a block\\n    inactiveBlocks[0].active = true;\\n    inactiveBlocks[0].size = size;\\n    inactiveBlocks[0].x = x - size * 0.5;\\n    inactiveBlocks[0].y = y - size * 0.5;\\n    inactiveBlocks[0].hue = Math.floor(Math.random() * 359);\\n  } else {\\n    const block = {\\n      active: true,\\n      hue: Math.floor(Math.random() * 359),\\n      x: x - size * 0.5,\\n      y: y - size * 0.5,\\n      size\\n    };\\n    blocks.push(block);\\n  }\\n};\\n\\nconst drawBlocks = () => {\\n  context.clearRect(0, 0, canvas.width, canvas.height);\\n  for (const block of blocks.filter((block) => block.active)) {\\n    context.strokeStyle = context.fillStyle = `hsl(${block.hue}, 80%, 80%)`;\\n    context.beginPath();\\n    context.arc(block.x, block.y, block.size * 0.5, 0, 2 * Math.PI);\\n    context.stroke();\\n    context.fill();\\n\\n    block.size -= 1;\\n    if (block.size === 0) {\\n      block.active = false;\\n    }\\n  }\\n  requestAnimationFrame(drawBlocks);\\n};\\n\\nconst setUp = () => {\\n  canvas = document.querySelector(\\\"canvas\\\");\\n  context = canvas.getContext(\\\"2d\\\");\\n  canvas.width = window.innerWidth;\\n  canvas.height = window.innerHeight;\\n  document.body.addEventListener(\\\"pointermove\\\", createBlock);\\n  // Listen for any pop-ups that are opened and make sure the canvas sits higher\\n  document.body.addEventListener(\\\"beforetoggle\\\", (e) => {\\n    if (e.newState === \\\"open\\\" && e.target !== canvas) {\\n      requestAnimationFrame(() => {\\n        canvas.hidePopover();\\n        canvas.showPopover();\\n      });\\n    }\\n  });\\n  requestAnimationFrame(drawBlocks);\\n};\\n\\nsetUp();\\nwindow.addEventListener(\\\"resize\\\", () => {\\n  if (canvas) {\\n    canvas.width = window.innerWidth;\\n    canvas.height = window.innerHeight;\\n  }\\n});\\n\\ncanvas.showPopover();\\n\",\"html_pre_processor\":\"none\",\"css_pre_processor\":\"none\",\"js_pre_processor\":\"none\",\"html_classes\":\"popup-support\",\"css_starter\":\"neither\",\"js_library\":null,\"created_at\":\"2022-09-03T20:11:12.014Z\",\"updated_at\":\"2023-01-19T11:21:35.793Z\",\"title\":\"20. 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