first commit

node_modules/vant/lib/composables/use-visibility-change.js

@@ -0,0 +1,49 @@
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all) => {
+  for (var name in all)
+    __defProp(target, name, { get: all[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+var stdin_exports = {};
+__export(stdin_exports, {
+  useVisibilityChange: () => useVisibilityChange
+});
+module.exports = __toCommonJS(stdin_exports);
+var import_utils = require("../utils");
+var import_vue = require("vue");
+var import_use = require("@vant/use");
+function useVisibilityChange(target, onChange) {
+  if (!import_utils.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);
+    }
+  };
+  (0, import_vue.onDeactivated)(unobserve);
+  (0, import_vue.onBeforeUnmount)(unobserve);
+  (0, import_use.onMountedOrActivated)(observe);
+}