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node_modules/vant/es/composables/use-visibility-change.mjs

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+import { inBrowser } from "../utils/index.mjs";
+import { onDeactivated, onBeforeUnmount } from "vue";
+import { onMountedOrActivated } from "@vant/use";
+function useVisibilityChange(target, onChange) {
+  if (!inBrowser || !window.IntersectionObserver) {
+    return;
+  }
+  const observer = new IntersectionObserver(
+    (entries) => {
+      onChange(entries[0].intersectionRatio > 0);
+    },
+    { root: document.body }
+  );
+  const observe = () => {
+    if (target.value) {
+      observer.observe(target.value);
+    }
+  };
+  const unobserve = () => {
+    if (target.value) {
+      observer.unobserve(target.value);
+    }
+  };
+  onDeactivated(unobserve);
+  onBeforeUnmount(unobserve);
+  onMountedOrActivated(observe);
+}
+export {
+  useVisibilityChange
+};