Jesus sucks

backend/frontend/node_modules/@restart/hooks/cjs/useIntersectionObserver.js

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+"use strict";
+
+exports.__esModule = true;
+exports.default = void 0;
+var _react = require("react");
+var _useStableMemo = _interopRequireDefault(require("./useStableMemo"));
+var _useIsomorphicEffect = _interopRequireDefault(require("./useIsomorphicEffect"));
+var _useEventCallback = _interopRequireDefault(require("./useEventCallback"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/**
+ * Setup an [`IntersectionObserver`](https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver) on
+ * a DOM Element that returns it's entries as they arrive.
+ *
+ * @param element The DOM element to observe
+ * @param init IntersectionObserver options with a notable change,
+ * unlike a plain IntersectionObserver `root: null` means "not provided YET",
+ * and the hook will wait until it receives a non-null value to set up the observer.
+ * This change allows for easier syncing of element and root values in a React
+ * context.
+ */
+
+/**
+ * Setup an [`IntersectionObserver`](https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver) on
+ * a DOM Element. This overload does not trigger component updates when receiving new
+ * entries. This allows for finer grained performance optimizations by the consumer.
+ *
+ * @param element The DOM element to observe
+ * @param callback A listener for intersection updates.
+ * @param init IntersectionObserver options with a notable change,
+ * unlike a plain IntersectionObserver `root: null` means "not provided YET",
+ * and the hook will wait until it receives a non-null value to set up the observer.
+ * This change allows for easier syncing of element and root values in a React
+ * context.
+ *
+ */
+
+function useIntersectionObserver(element, callbackOrOptions, maybeOptions) {
+  let callback;
+  let options;
+  if (typeof callbackOrOptions === 'function') {
+    callback = callbackOrOptions;
+    options = maybeOptions || {};
+  } else {
+    options = callbackOrOptions || {};
+  }
+  const {
+    threshold,
+    root,
+    rootMargin
+  } = options;
+  const [entries, setEntry] = (0, _react.useState)(null);
+  const handler = (0, _useEventCallback.default)(callback || setEntry);
+
+  // We wait for element to exist before constructing
+  const observer = (0, _useStableMemo.default)(() => root !== null && typeof IntersectionObserver !== 'undefined' && new IntersectionObserver(handler, {
+    threshold,
+    root,
+    rootMargin
+  }), [handler, root, rootMargin, threshold && JSON.stringify(threshold)]);
+  (0, _useIsomorphicEffect.default)(() => {
+    if (!element || !observer) return;
+    observer.observe(element);
+    return () => {
+      observer.unobserve(element);
+    };
+  }, [observer, element]);
+  return callback ? undefined : entries || [];
+}
+var _default = useIntersectionObserver;
+exports.default = _default;