lisn.js/dist/cjs/modules/x-intersection-observer.cjs.map

Simply handle user gestures and actions. Includes widgets.

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\"@lisn/globals/minification-helpers\";\n\nexport type XIntersectionObserverCallback = (\n  entries: IntersectionObserverEntry[],\n  observer: XIntersectionObserver,\n) => void;\n\n/**\n * {@link XIntersectionObserver} is an extension of\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver | IntersectionObserver}\n * with added capabilities:\n * - can skip the initial callback that happens shortly after setting up via\n *   {@link observeLater}\n */\nexport class XIntersectionObserver {\n  /**\n   * Like {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/root | IntersectionObserver:root}.\n   */\n  readonly root!: Element | Document | null;\n\n  /**\n   * Like {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/rootMargin | IntersectionObserver:rootMargin}.\n   */\n  readonly rootMargin!: string;\n\n  /**\n   * Like {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/thresholds | IntersectionObserver:thresholds}.\n   */\n  readonly thresholds!: number[];\n\n  /**\n   * Like {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/observe | IntersectionObserver:observe} except it accepts multiple\n   * targets.\n   */\n  readonly observe: (...targets: Element[]) => void;\n\n  /**\n   * Like {@link observe} but it ignores the initial almost immediate callback\n   * and only calls the callback on a subsequent intersection change.\n   */\n  readonly observeLater: (...targets: Element[]) => void;\n\n  /**\n   * Like {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/unobserve | IntersectionObserver:unobserve} except it accepts multiple\n   * targets.\n   */\n  readonly unobserve: (...targets: Element[]) => void;\n\n  /**\n   * Like {@link https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver/disconnect | IntersectionObserver:disconnect}.\n   */\n  readonly disconnect: () => void;\n\n  /**\n   * Like `IntersectionObserver.takeRecords`.\n   */\n  readonly takeRecords: () => void;\n\n  constructor(\n    callback: XIntersectionObserverCallback,\n    observeOptions?: IntersectionObserverInit,\n  ) {\n    let observedTargets = MH.newWeakSet<Element>();\n    const targetsToSkip = MH.newWeakSet<Element>();\n\n    const intersectionHandler = (entries: IntersectionObserverEntry[]) => {\n      const selectedEntries = [];\n\n      for (const entry of entries) {\n        if (targetsToSkip.has(MH.targetOf(entry))) {\n          MH.deleteKey(targetsToSkip, MH.targetOf(entry));\n          continue;\n        }\n\n        selectedEntries.push(entry);\n      }\n\n      if (MH.lengthOf(selectedEntries)) {\n        callback(selectedEntries, this);\n      }\n    };\n\n    const observer = MH.newIntersectionObserver(\n      intersectionHandler,\n      observeOptions,\n    );\n\n    MH.defineProperty(this, \"root\", { get: () => observer.root });\n    MH.defineProperty(this, \"rootMargin\", {\n      get: () => observer.rootMargin,\n    });\n    MH.defineProperty(this, \"thresholds\", {\n      get: () => observer.thresholds,\n    });\n\n    this.observe = (...targets) => {\n      for (const target of targets) {\n        observedTargets.add(target);\n        observer.observe(target);\n      }\n    };\n\n    this.observeLater = (...targets) => {\n      for (const target of targets) {\n        // Only skip them if not already observed, otherwise the initial\n        // (almost) immediate callback won't happen anyway.\n        if (observedTargets.has(target)) {\n          continue;\n        }\n\n        targetsToSkip.add(target);\n        this.observe(target);\n      }\n    };\n\n    this.unobserve = (...targets) => {\n      for (const target of targets) {\n        MH.deleteKey(observedTargets, target);\n        observer.unobserve(target);\n      }\n    };\n\n    this.disconnect = () => {\n      observedTargets = MH.newWeakSet();\n      observer.disconnect();\n    };\n\n    this.takeRecords 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