50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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var stdin_exports = {};
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__export(stdin_exports, {
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useVisibilityChange: () => useVisibilityChange
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});
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module.exports = __toCommonJS(stdin_exports);
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var import_utils = require("../utils");
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var import_vue = require("vue");
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var import_use = require("@vant/use");
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function useVisibilityChange(target, onChange) {
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if (!import_utils.inBrowser || !window.IntersectionObserver) {
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return;
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}
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const observer = new IntersectionObserver(
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(entries) => {
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onChange(entries[0].intersectionRatio > 0);
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},
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{ root: document.body }
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);
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const observe = () => {
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if (target.value) {
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observer.observe(target.value);
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}
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};
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const unobserve = () => {
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if (target.value) {
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observer.unobserve(target.value);
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}
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};
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(0, import_vue.onDeactivated)(unobserve);
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(0, import_vue.onBeforeUnmount)(unobserve);
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(0, import_use.onMountedOrActivated)(observe);
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}
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