tethysfaceid/.next/cache/next-babel-loader/105fcf982d99eead3ffc6db2cf5493ca.json

{"ast":null,"code":"\"use strict\";\n\nvar _slicedToArray = require(\"/Users/dhrumil1/Documents/Tethy/online-verification/node_modules/@babel/runtime/helpers/slicedToArray\");\n\nvar _interopRequireDefault = require(\"@babel/runtime/helpers/interopRequireDefault\");\n\nexports.__esModule = true;\nexports.useIntersection = useIntersection;\n\nvar _react = require(\"react\");\n\nvar _requestIdleCallback = _interopRequireDefault(require(\"./request-idle-callback\"));\n\nvar hasIntersectionObserver = typeof IntersectionObserver !== 'undefined';\n\nfunction useIntersection(_ref) {\n  var rootMargin = _ref.rootMargin,\n      disabled = _ref.disabled;\n  var isDisabled = disabled || !hasIntersectionObserver;\n  var unobserve = (0, _react.useRef)();\n\n  var _ref2 = (0, _react.useState)(false),\n      _ref3 = _slicedToArray(_ref2, 2),\n      visible = _ref3[0],\n      setVisible = _ref3[1];\n\n  var setRef = (0, _react.useCallback)(function (el) {\n    if (unobserve.current) {\n      unobserve.current();\n      unobserve.current = undefined;\n    }\n\n    if (isDisabled || visible) return;\n\n    if (el && el.tagName) {\n      unobserve.current = observe(el, function (isVisible) {\n        return isVisible && setVisible(isVisible);\n      }, {\n        rootMargin: rootMargin\n      });\n    }\n  }, [isDisabled, rootMargin, visible]);\n  (0, _react.useEffect)(function () {\n    if (!hasIntersectionObserver) {\n      if (!visible) (0, _requestIdleCallback[\"default\"])(function () {\n        return setVisible(true);\n      });\n    }\n  }, [visible]);\n  return [setRef, visible];\n}\n\nfunction observe(element, callback, options) {\n  var _createObserver = createObserver(options),\n      id = _createObserver.id,\n      observer = _createObserver.observer,\n      elements = _createObserver.elements;\n\n  elements.set(element, callback);\n  observer.observe(element);\n  return function unobserve() {\n    observer.unobserve(element); // Destroy observer when there's nothing left to watch:\n\n    if (elements.size === 0) {\n      observer.disconnect();\n      observers[\"delete\"](id);\n    }\n  };\n}\n\nvar observers = new Map();\n\nfunction createObserver(options) {\n  var id = options.rootMargin || '';\n  var instance = observers.get(id);\n\n  if (instance) {\n    return instance;\n  }\n\n  var elements = new Map();\n  var observer = new IntersectionObserver(function (entries) {\n    entries.forEach(function (entry) {\n      var callback = elements.get(entry.target);\n      var isVisible = entry.isIntersecting || entry.intersectionRatio > 0;\n\n      if (callback && isVisible) {\n        callback(isVisible);\n      }\n    });\n  }, options);\n  observers.set(id, instance = {\n    id: id,\n    observer: observer,\n    elements: elements\n  });\n  return instance;\n}","map":null,"metadata":{},"sourceType":"script"}