CodePen Embed - Anchor Positioning Context Menus

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class=\\\"playing\\\">\\n  <img src=\\\"https://picsum.photos/300/300?random=1\\\" alt=\\\"Album cover\\\">\\n  <div class=\\\"playing__meta\\\">\\n    <div class=\\\"details\\\">\\n      <div>Some song title</div>\\n      <div>Some Artist</div>\\n    </div>\\n    <div class=\\\"actions\\\">\\n      <button>\\n        <svg xmlns=\\\"http://www.w3.org/2000/svg\\\" fill=\\\"none\\\" viewBox=\\\"0 0 24 24\\\" stroke-width=\\\"1.5\\\" stroke=\\\"currentColor\\\" class=\\\"w-6 h-6\\\">\\n          <path stroke-linecap=\\\"round\\\" stroke-linejoin=\\\"round\\\" d=\\\"M21 8.25c0-2.485-2.099-4.5-4.688-4.5-1.935 0-3.597 1.126-4.312 2.733-.715-1.607-2.377-2.733-4.313-2.733C5.1 3.75 3 5.765 3 8.25c0 7.22 9 12 9 12s9-4.78 9-12z\\\" />\\n        </svg>\\n        <span class=\\\"sr-only\\\">Like track</span>\\n      </button>\\n      <button popovertarget=\\\"context\\\">\\n        <svg xmlns=\\\"http://www.w3.org/2000/svg\\\" fill=\\\"none\\\" viewBox=\\\"0 0 24 24\\\" stroke-width=\\\"1.5\\\" stroke=\\\"currentColor\\\" class=\\\"w-6 h-6\\\">\\n          <path stroke-linecap=\\\"round\\\" fill=\\\"none\\\" stroke-width=\\\"2\\\" stroke-linejoin=\\\"round\\\" d=\\\"M4.5 15.75l7.5-7.5 7.5 7.5\\\" />\\n        </svg>\\n        <span class=\\\"sr-only\\\">Toggle menu</span>\\n      </button>\\n      <nav popover=\\\"auto\\\" id=\\\"context\\\">\\n        <ul>\\n          <li>Add to queue</li>\\n          <hr>\\n          <li>Go to song radio</li>\\n          <li>Go to artist</li>\\n          <li>Go to album</li>\\n          <li>Show credits</li>\\n          <hr>\\n          <li>Save to your Liked Songs</li>\\n          <li>\\n            <button popovertarget=\\\"playlist\\\">\\n              <span>Add to playlist</span>\\n              <svg xmlns=\\\"http://www.w3.org/2000/svg\\\" fill=\\\"none\\\" viewBox=\\\"0 0 24 24\\\" stroke-width=\\\"1.5\\\" stroke=\\\"currentColor\\\" class=\\\"w-6 h-6\\\">\\n                <path stroke-linecap=\\\"round\\\" fill=\\\"none\\\" stroke-width=\\\"2\\\" stroke-linejoin=\\\"round\\\" d=\\\"M4.5 15.75l7.5-7.5 7.5 7.5\\\" />\\n              </svg>\\n            </button>\\n          </li>\\n          <hr>\\n          <li>\\n            <button popovertarget=\\\"share\\\">\\n              <span>Share</span>\\n              <svg xmlns=\\\"http://www.w3.org/2000/svg\\\" fill=\\\"none\\\" viewBox=\\\"0 0 24 24\\\" stroke-width=\\\"1.5\\\" stroke=\\\"currentColor\\\" class=\\\"w-6 h-6\\\">\\n                <path stroke-linecap=\\\"round\\\" fill=\\\"none\\\" stroke-width=\\\"2\\\" stroke-linejoin=\\\"round\\\" d=\\\"M4.5 15.75l7.5-7.5 7.5 7.5\\\" />\\n              </svg>\\n            </button>\\n          </li>\\n        </ul>\\n      </nav>\\n      <div popover=\\\"auto\\\" id=\\\"share\\\">\\n        <ul>\\n          <li>Copy Song Link</li>\\n          <li>Embed track</li>\\n        </ul>\\n      </div>\\n      <div popover=\\\"auto\\\" id=\\\"playlist\\\">\\n        <ul>\\n          <li>\\n            <input type=\\\"search\\\" placeholder=\\\"Find a playlist\\\">\\n            <svg xmlns=\\\"http://www.w3.org/2000/svg\\\" fill=\\\"none\\\" viewBox=\\\"0 0 24 24\\\" stroke-width=\\\"1.5\\\" stroke=\\\"currentColor\\\" class=\\\"w-6 h-6\\\">\\n              <path stroke-linecap=\\\"round\\\" fill=\\\"none\\\" stroke=\\\"var(--text-1)\\\" stroke-linejoin=\\\"round\\\" d=\\\"M21 21l-5.197-5.197m0 0A7.5 7.5 0 105.196 5.196a7.5 7.5 0 0010.607 10.607z\\\" />\\n            </svg>\\n          </li>\\n          <li>Create playlist</li>\\n          <hr>\\n          <li>5 Star</li>\\n          <li>Lofi</li>\\n          <li>Valentine's</li>\\n          <li>Rock</li>\\n          <li>Chill</li>\\n          <li>Liked</li>\\n          <li>Changing Room</li>\\n        </ul>\\n      </div>\\n    </div>\\n  </div>\\n</div>\\n<select>\\n  <option value=center>Content Position</option>\\n  <option value=top>Top</option>\\n  <option value=right>Right</option>\\n  <option value=bottom>Bottom</option>\\n  <option value=left>Left</option>\\n  <option value=center>Center</option>\\n</select>\",\"css\":\"@layer demo {\\n  [popovertarget=\\\"share\\\"] {\\n    anchor-name: --share;\\n  }\\n  [popovertarget=\\\"playlist\\\"] {\\n    anchor-name: --playlist;\\n  }\\n  [popovertarget=\\\"context\\\"] {\\n    anchor-name: --context;\\n  }\\n  :root:has(#context:open) [popovertarget=\\\"context\\\"] svg {\\n    rotate: 180deg;\\n  }\\n  :root:has(#share:open) [popovertarget=\\\"share\\\"] svg,\\n  :root:has(#playlist:open) [popovertarget=\\\"playlist\\\"] svg {\\n    --rotate: 1;\\n  }\\n  #share {\\n    anchor-default: --share;\\n    position-fallback: --aligned;\\n  }\\n\\n  #playlist {\\n    anchor-default: --playlist;\\n    position-fallback: --aligned;\\n  }\\n\\n  #context {\\n    anchor-default: --context;\\n    position-fallback: --flip;\\n  }\\n\\n  [popover] {\\n    inset: unset;\\n  }\\n\\n  @position-fallback --aligned {\\n    @try {\\n      top: anchor(top);\\n      left: anchor(right);\\n    }\\n    @try {\\n      top: anchor(bottom);\\n      left: anchor(right);\\n    }\\n    @try {\\n      top: anchor(top);\\n      right: anchor(left);\\n    }\\n    @try {\\n      bottom: anchor(bottom);\\n      left: anchor(right);\\n    }\\n    @try {\\n      right: anchor(left);\\n      bottom: anchor(bottom);\\n    }\\n  }\\n  @position-fallback --flip {\\n    @try {\\n      bottom: anchor(top);\\n      left: anchor(left);\\n    }\\n    @try {\\n      right: anchor(right);\\n      bottom: anchor(top);\\n    }\\n    @try {\\n      top: anchor(bottom);\\n      left: anchor(left);\\n    }\\n    @try {\\n      top: anchor(bottom);\\n      right: anchor(right);\\n    }\\n  }\\n}\\n\\n[popovertarget] svg {\\n  transition: rotate 0.2s, transform 0.2s;\\n}\\n\\nli {\\n  white-space: nowrap;\\n}\\n\\n[popover] ul {\\n  font-size: var(--font-size-1);\\n  color: var(--text-2);\\n}\\n\\n[type=\\\"search\\\"] {\\n  anchor-name: --search;\\n}\\n\\n[type=\\\"search\\\"] + svg {\\n  position: absolute;\\n  width: var(--size-4);\\n  left: anchor(--search left);\\n  top: anchor(--search center);\\n  translate: var(--size-2) 0%;\\n}\\n\\n:is(button, input):focus-visible {\\n  background: var(--surface-2);\\n  outline-color: transparent;\\n  transition: none;\\n  outline-width: 0;\\n}\\n\\n[popover] {\\n  opacity: var(--open, 0);\\n  scale: calc(0.9 + (var(--open, 0) * 0.1));\\n  transition: opacity 0.2s, scale 0.2s, top 0.2s, right 0.2s, left 0.2s,\\n    bottom 0.2s;\\n  box-shadow: var(--shadow-5);\\n}\\n\\n[popover]:open {\\n  --open: 1;\\n}\\n\\nli {\\n  position: relative;\\n}\\n\\nli svg {\\n  width: 24px;\\n  position: absolute;\\n  right: var(--size-4);\\n  top: 50%;\\n  transition: transform 0.2s;\\n  transform: translate(0, -50%)\\n    rotate(calc((var(--rotate, 0) * 180deg) + 90deg));\\n}\\n\\n.actions li:has(button, input) {\\n  padding: 0;\\n}\\n\\n[type=\\\"search\\\"] {\\n  border-radius: 0;\\n  padding: var(--size-4);\\n  padding-left: 2.5rem;\\n}\\n\\nbody:has([value=\\\"top\\\"]:checked) {\\n  align-content: start;\\n}\\nbody:has([value=\\\"right\\\"]:checked) {\\n  justify-content: end;\\n}\\nbody:has([value=\\\"bottom\\\"]:checked) {\\n  align-content: end;\\n}\\nbody:has([value=\\\"left\\\"]:checked) {\\n  justify-content: left;\\n}\\nbody:has([value=\\\"center\\\"]:checked) {\\n  align-items: center;\\n}\\n\\n*,\\n*:after,\\n*:before {\\n  box-sizing: border-box;\\n}\\n\\nbody {\\n  display: grid;\\n  place-items: center;\\n  min-height: 100vh;\\n  font-family: \\\"Google Sans\\\", sans-serif, system-ui;\\n  background: var(--surface-1);\\n}\\n\\n.sr-only {\\n  position: absolute;\\n  width: 1px;\\n  height: 1px;\\n  padding: 0;\\n  margin: -1px;\\n  overflow: hidden;\\n  clip: rect(0, 0, 0, 0);\\n  white-space: nowrap;\\n  border-width: 0;\\n}\\n\\n.actions > button {\\n  width: 44px;\\n  aspect-ratio: 1;\\n  padding: 0;\\n  display: grid;\\n  place-items: center;\\n  border-radius: 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