滑动关闭

<div class="motion-demo motion-demo--swipe-to-dismiss" data-motion="swipe-to-dismiss" aria-label="滑动关闭 示例">
  <div class="motion-swipe-shell"><article class="motion-surface" tabindex="0" data-swipe-target data-dismiss-label="内容已关闭" aria-label="滑动关闭. 水平滑动关闭；键盘用户按 Delete 键关闭。"><strong>滑动关闭</strong><span class="motion-line"></span><span class="motion-line"></span></article><div class="motion-action-row"><button class="motion-dismiss-button" type="button" data-swipe-dismiss>关闭</button><button class="motion-undo-button" type="button" data-swipe-undo data-restore-label="内容已恢复" hidden>撤销关闭</button></div><span class="motion-status" data-motion-status role="status" aria-live="polite"></span></div>
</div>

.motion-demo.motion-demo--swipe-to-dismiss {
  box-sizing: border-box;
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 34rem);
  min-height: 15rem;
  padding: 2rem;
  overflow: hidden;
  color: #18181b;
  background: #fafafa;
  border: 1px solid #e4e4e7;
  border-radius: 16px;
  isolation: isolate;
}

.motion-demo.motion-demo--swipe-to-dismiss *, .motion-demo.motion-demo--swipe-to-dismiss *::before, .motion-demo.motion-demo--swipe-to-dismiss *::after {
  box-sizing: border-box;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-surface {
  position: relative;
  display: grid;
  gap: 0.65rem;
  width: min(100%, 18rem);
  padding: 1.25rem;
  background: #ffffff;
  border: 1px solid #e4e4e7;
  border-radius: 16px;
  box-shadow: none;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-surface strong { font-weight: 500; }

.motion-demo.motion-demo--swipe-to-dismiss .motion-line {
  display: block;
  width: 100%;
  height: 0.5rem;
  background: #e4e4e7;
  border-radius: 999px;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-line:last-child { width: 62%; }

.motion-demo.motion-demo--swipe-to-dismiss .motion-button {
  position: relative;
  min-height: 2.75rem;
  padding: 0.75rem 1.1rem;
  color: white;
  font: inherit;
  font-weight: 700;
  background: #18181b;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-button:focus-visible { outline: 3px solid rgb(37 99 235 / 32%); outline-offset: 3px; }

.motion-demo.motion-demo--swipe-to-dismiss .motion-action-row {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-replay-scene {
  width: min(100%, 22rem);
  display: grid;
  place-items: center;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-pausable-scene {
  width: min(100%, 22rem);
  display: grid;
  place-items: center;
}

.motion-demo.motion-demo--swipe-to-dismiss button.motion-surface {
  color: inherit;
  font: inherit;
  text-align: start;
  cursor: pointer;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-replay-button,
.motion-demo.motion-demo--swipe-to-dismiss .motion-undo-button,
.motion-demo.motion-demo--swipe-to-dismiss .motion-dismiss-button,
.motion-demo.motion-demo--swipe-to-dismiss .motion-pause-button {
  min-height: 2.75rem;
  padding: 0.65rem 0.9rem;
  color: #18181b;
  font: 650 0.78rem/1 ui-sans-serif, system-ui, sans-serif;
  background: #ffffff;
  border: 1px solid #d4d4d8;
  border-radius: 8px;
  cursor: pointer;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-replay-button:focus-visible,
.motion-demo.motion-demo--swipe-to-dismiss .motion-undo-button:focus-visible,
.motion-demo.motion-demo--swipe-to-dismiss .motion-dismiss-button:focus-visible,
.motion-demo.motion-demo--swipe-to-dismiss .motion-pause-button:focus-visible,
.motion-demo.motion-demo--swipe-to-dismiss [data-reorder-item]:focus-visible,
.motion-demo.motion-demo--swipe-to-dismiss [data-swipe-target]:focus-visible {
  outline: 3px solid rgb(37 99 235 / 32%);
  outline-offset: 3px;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-ripple-ink {
  position: absolute;
  width: 12px;
  height: 12px;
  pointer-events: none;
  background: rgb(255 255 255 / 72%);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  opacity: 0;
}

.motion-demo.motion-demo--swipe-to-dismiss .motion-state-stack { position: relative; width: min(100%, 18rem); height: 9rem; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-state { position: absolute; inset: 0; display: grid; place-items: center; padding: 1rem; background: #ffffff; border: 1px solid #e4e4e7; border-radius: 16px; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-state--to { background: #18181b; color: white; }

.motion-demo.motion-demo--swipe-to-dismiss .motion-scroll-track > span { color: #71717a; font: 600 0.72rem/1.2 ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-orbit-item { display: grid; place-items: center; width: 2.5rem; height: 2.5rem; color: white; background: #2563eb; border-radius: 50%; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-text-stack { position: relative; width: min(100%, 18rem); min-height: 4rem; }
.motion-demo.motion-demo--swipe-to-dismiss svg { width: min(100%, 20rem); height: auto; }

.motion-demo.motion-demo--swipe-to-dismiss .motion-swipe-shell { width: min(100%, 18rem); text-align: center; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-surface { width: 100%; touch-action: pan-y; user-select: none; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-surface.is-dragging { cursor: grabbing; }
.motion-demo.motion-demo--swipe-to-dismiss .motion-undo-button[hidden] { display: none; }

@keyframes motion-swipe-to-dismiss-reduced-fade {
  from { opacity: 0.84; }
  to { opacity: 1; }
}

.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss {
  animation: motion-swipe-to-dismiss-reduced-fade 160ms cubic-bezier(0.23, 1, 0.32, 1) both !important;
}

.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss *,
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss *::before,
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss *::after {
  animation: none !important;
  animation-delay: 0ms !important;
  animation-iteration-count: 1 !important;
  transition-property: opacity, color, background-color, border-color !important;
  transition-duration: 160ms !important;
  transition-delay: 0ms !important;
  scroll-behavior: auto !important;
}

.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss .motion-button,
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss [data-reorder-item],
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss [data-swipe-target],
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss [data-spring-target] {
  transform: none !important;
}

.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss .motion-path { stroke-dashoffset: 0 !important; }
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss .motion-word--from { opacity: 0 !important; visibility: hidden; }
.force-reduced-motion .motion-demo.motion-demo--swipe-to-dismiss .motion-word:not(.motion-word--from) { opacity: 1 !important; filter: none !important; transform: none !important; }

@media (prefers-reduced-motion: reduce) {
  .motion-demo.motion-demo--swipe-to-dismiss {
    animation: motion-swipe-to-dismiss-reduced-fade 160ms cubic-bezier(0.23, 1, 0.32, 1) both !important;
  }

  .motion-demo.motion-demo--swipe-to-dismiss *, .motion-demo.motion-demo--swipe-to-dismiss *::before, .motion-demo.motion-demo--swipe-to-dismiss *::after {
    animation: none !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-property: opacity, color, background-color, border-color !important;
    transition-duration: 160ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .motion-demo.motion-demo--swipe-to-dismiss .motion-button,
  .motion-demo.motion-demo--swipe-to-dismiss [data-reorder-item],
  .motion-demo.motion-demo--swipe-to-dismiss [data-swipe-target],
  .motion-demo.motion-demo--swipe-to-dismiss [data-spring-target] {
    transform: none !important;
  }

  .motion-demo.motion-demo--swipe-to-dismiss .motion-path { stroke-dashoffset: 0 !important; }
  .motion-demo.motion-demo--swipe-to-dismiss .motion-word--from { opacity: 0 !important; visibility: hidden; }
  .motion-demo.motion-demo--swipe-to-dismiss .motion-word:not(.motion-word--from) { opacity: 1 !important; filter: none !important; transform: none !important; }
}

(() => {
  const config = {
  "id": "swipe-to-dismiss",
  "duration": 240,
  "distance": 96,
  "resistance": 65,
  "position": 50,
  "stiffness": 220,
  "damping": 24,
  "mass": 1,
  "velocity": 0,
  "rippleSize": 220,
  "rippleOpacity": 24,
  "dragScale": 103,
  "autoplay": false
};
  const mount = (root, config) => {

    const cleanups = [];
    const addCleanup = (callback) => cleanups.push(callback);
    const cleanup = () => {
      for (let index = cleanups.length - 1; index >= 0; index -= 1) {
        try { cleanups[index](); } catch { /* keep cleanup reentrant */ }
      }
      cleanups.length = 0;
    };
    const on = (target, type, listener, options) => {
      target.addEventListener(type, listener, options);
      addCleanup(() => target.removeEventListener(type, listener, options));
    };
    const reduced = () => root.closest(".force-reduced-motion") !== null ||
      window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    const watchReduced = (callback) => {
      const media = window.matchMedia("(prefers-reduced-motion: reduce)");
      const notify = () => callback(reduced());
      media.addEventListener("change", notify);
      const observer = typeof MutationObserver === "undefined" ? null : new MutationObserver(notify);
      let ancestor = root;
      while (observer && ancestor) {
        observer.observe(ancestor, { attributes: true, attributeFilter: ["class"] });
        ancestor = ancestor.parentElement;
      }
      addCleanup(() => {
        media.removeEventListener("change", notify);
        if (observer) observer.disconnect();
      });
    };

    const target = root.querySelector("[data-swipe-target]");
    const undo = root.querySelector("[data-swipe-undo]");
    const dismissButton = root.querySelector("[data-swipe-dismiss]");
    const status = root.querySelector("[data-motion-status]");
    if (!target || !undo) return cleanup;
    const initial = {
      status: status ? status.textContent : "",
      targetHidden: target.hidden,
      undoHidden: undo.hidden,
      dismissHidden: dismissButton ? dismissButton.hidden : false,
      ariaHidden: target.getAttribute("aria-hidden")
    };
    let pointerId = null;
    let startX = 0;
    let startTime = 0;
    let rawDistance = 0;
    let activeAnimation = null;
    const announce = (message) => { if (status) status.textContent = message; };
    const clearInline = () => { target.style.transform = ""; target.style.opacity = ""; };
    const canonical = () => {
      if (activeAnimation) activeAnimation.cancel();
      activeAnimation = null;
      if (pointerId !== null && target.hasPointerCapture(pointerId)) target.releasePointerCapture(pointerId);
      pointerId = null;
      rawDistance = 0;
      clearInline();
      target.classList.remove("is-dragging", "is-dismissed");
      target.hidden = initial.targetHidden;
      if (initial.ariaHidden === null) target.removeAttribute("aria-hidden");
      else target.setAttribute("aria-hidden", initial.ariaHidden);
      undo.hidden = initial.undoHidden;
      if (dismissButton) dismissButton.hidden = initial.dismissHidden;
      if (status) status.textContent = initial.status || "";
    };
    addCleanup(canonical);
    const settle = () => {
      const transform = getComputedStyle(target).transform;
      const opacity = getComputedStyle(target).opacity;
      if (activeAnimation) activeAnimation.cancel();
      activeAnimation = target.animate(
        reduced()
          ? [{ opacity }, { opacity: 1 }]
          : [{ transform, opacity }, { transform: "translate3d(0, 0, 0)", opacity: 1 }],
        { duration: 180, easing: "cubic-bezier(0.23, 1, 0.32, 1)", fill: "forwards" }
      );
      activeAnimation.addEventListener("finish", () => { activeAnimation = null; clearInline(); }, { once: true });
    };
    const dismiss = (direction, keyboard) => {
      const finish = () => {
        activeAnimation = null;
        target.hidden = true;
        target.classList.add("is-dismissed");
        target.setAttribute("aria-hidden", "true");
        if (dismissButton) dismissButton.hidden = true;
        undo.hidden = false;
        clearInline();
        announce(target.dataset.dismissLabel || "Item dismissed");
        target.dispatchEvent(new CustomEvent("motion:dismiss", { bubbles: true }));
        if (keyboard) undo.focus();
      };
      if (keyboard) { finish(); return; }
      const transform = getComputedStyle(target).transform;
      const opacity = getComputedStyle(target).opacity;
      const exit = direction * Math.max(root.clientWidth, config.distance * 2);
      if (activeAnimation) activeAnimation.cancel();
      activeAnimation = target.animate(
        reduced()
          ? [{ opacity }, { opacity: 0 }]
          : [{ transform, opacity }, { transform: "translate3d(" + String(exit) + "px, 0, 0)", opacity: 0 }],
        { duration: 200, easing: "cubic-bezier(0.32, 0.72, 0, 1)", fill: "forwards" }
      );
      activeAnimation.addEventListener("finish", finish, { once: true });
    };
    const pointerDown = (event) => {
      if (!event.isPrimary || event.button !== 0 || pointerId !== null || target.hidden) return;
      if (activeAnimation) activeAnimation.cancel();
      activeAnimation = null;
      pointerId = event.pointerId;
      startX = event.clientX;
      startTime = performance.now();
      rawDistance = 0;
      target.setPointerCapture(event.pointerId);
      target.classList.add("is-dragging");
    };
    const pointerMove = (event) => {
      if (event.pointerId !== pointerId) return;
      rawDistance = event.clientX - startX;
      const resistance = Math.min(0.9, Math.max(0.1, config.resistance / 100));
      const damped = Math.sign(rawDistance) * Math.pow(Math.abs(rawDistance), 0.9) * (1 - resistance);
      const progress = Math.min(1, Math.abs(damped) / Math.max(1, config.distance));
      if (!reduced()) target.style.transform = "translate3d(" + String(damped) + "px, 0, 0)";
      target.style.opacity = String(1 - progress * 0.5);
    };
    const pointerUp = (event) => {
      if (event.pointerId !== pointerId) return;
      if (target.hasPointerCapture(event.pointerId)) target.releasePointerCapture(event.pointerId);
      target.classList.remove("is-dragging");
      const velocity = Math.abs(rawDistance) / Math.max(1, performance.now() - startTime);
      const threshold = Math.min(96, Math.max(48, config.distance * 0.6));
      const shouldDismiss = Math.abs(rawDistance) >= threshold || velocity > 0.11;
      const direction = rawDistance === 0 ? 1 : Math.sign(rawDistance);
      pointerId = null;
      if (shouldDismiss) dismiss(direction, false);
      else settle();
    };
    const pointerCancel = (event) => {
      if (event.pointerId !== pointerId) return;
      if (target.hasPointerCapture(event.pointerId)) target.releasePointerCapture(event.pointerId);
      pointerId = null;
      target.classList.remove("is-dragging");
      settle();
    };
    const keyDown = (event) => {
      if (event.key !== "Delete" && event.key !== "Backspace") return;
      event.preventDefault();
      dismiss(event.key === "Delete" ? 1 : -1, true);
    };
    const dismissControl = (event) => dismiss(1, event.detail === 0);
    const restore = () => {
      if (activeAnimation) activeAnimation.cancel();
      target.hidden = false;
      target.classList.remove("is-dismissed");
      target.removeAttribute("aria-hidden");
      undo.hidden = true;
      if (dismissButton) dismissButton.hidden = false;
      const offset = Math.max(root.clientWidth, config.distance * 2);
      activeAnimation = target.animate(
        reduced()
          ? [{ opacity: 0 }, { opacity: 1 }]
          : [{ transform: "translate3d(" + String(offset) + "px, 0, 0)", opacity: 0 }, { transform: "translate3d(0, 0, 0)", opacity: 1 }],
        { duration: reduced() ? 160 : 200, easing: "cubic-bezier(0.32, 0.72, 0, 1)" }
      );
      announce(undo.dataset.restoreLabel || "Item restored");
      target.focus();
    };
    on(target, "pointerdown", pointerDown);
    on(target, "pointermove", pointerMove);
    on(target, "pointerup", pointerUp);
    on(target, "pointercancel", pointerCancel);
    on(target, "keydown", keyDown);
    if (dismissButton) on(dismissButton, "click", dismissControl);
    on(undo, "click", restore);
    return cleanup;
  };
  document.querySelectorAll("[data-motion=\"swipe-to-dismiss\"]").forEach((root) => {
    const cleanupKey = "__motionLexiconCleanup";
    if (typeof root[cleanupKey] === "function") root[cleanupKey]();
    root[cleanupKey] = mount(root, config);
  });
})();