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void 0 : _mountRef$current.call(mountRef);\n  }, []);\n};\n\nexport default useMount;","import { useEffect } from 'react';\nimport on from 'dom-lib/on';\n/**\n * Attach the event handler directly to the specified DOM element.\n *\n * @param element The target to listen for events on\n * @param event The DOM event name\n * @param handler An event handler\n * @param capture Whether or not to listen during the capture event phase\n */\n\nexport default function useEventListener(eventTarget, event, listener, capture) {\n  if (capture === void 0) {\n    capture = false;\n  }\n\n  useEffect(function () {\n    var target = typeof eventTarget === 'function' ? eventTarget() : eventTarget;\n    var controller = target ? on(target, event, listener, capture) : null;\n    return function () {\n      controller === null || controller === void 0 ? void 0 : controller.off();\n    };\n  }, [eventTarget, event, listener, capture]);\n}","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/esm/objectWithoutPropertiesLoose\";\nimport React, { useCallback, useEffect, useRef, useState } from 'react';\nimport getOffset from 'dom-lib/getOffset';\nimport { mergeRefs, useClassNames, useElementResize, useEventListener, useMount } from '../utils';\n/**\n * Get the layout size and offset of the mount element\n */\n\nfunction useOffset(mountRef) {\n  var _useState = useState(null),\n      offset = _useState[0],\n      setOffset = _useState[1];\n\n  var updateOffset = useCallback(function () {\n    setOffset(getOffset(mountRef.current));\n  }, [mountRef]); // Update after the element size changes\n\n  useElementResize(function () {\n    return mountRef.current;\n  }, updateOffset); // Initialize after the first render\n\n  useMount(updateOffset); // Update after window size changes\n\n  useEventListener(window, 'resize', updateOffset, false);\n  return offset;\n}\n/**\n * Get the layout size and offset of the container element\n * @param container\n */\n\n\nfunction useContainerOffset(container) {\n  var _useState2 = useState(null),\n      offset = _useState2[0],\n      setOffset = _useState2[1];\n\n  useEffect(function () {\n    var node = typeof container === 'function' ? container() : container;\n    setOffset(node ? getOffset(node) : null);\n  }, [container]);\n  return offset;\n}\n/**\n * Check whether the current element should be in a fixed state.\n * @param offset\n * @param containerOffset\n * @param props\n */\n\n\nfunction useFixed(offset, containerOffset, props) {\n  var top = props.top,\n      onChange = props.onChange;\n\n  var _useState3 = useState(false),\n      fixed = _useState3[0],\n      setFixed = _useState3[1];\n\n  var handleScroll = useCallback(function () {\n    if (!offset) {\n      return;\n    }\n\n    var scrollY = window.scrollY || window.pageYOffset; // When the scroll distance exceeds the element's top value, it is fixed.\n\n    var nextFixed = scrollY - (Number(offset.top) - Number(top)) >= 0; // If the current element is specified in the container,\n    // add to determine whether the current container is in the window range.\n\n    if (containerOffset) {\n      nextFixed = nextFixed && scrollY < Number(containerOffset.top) + Number(containerOffset.height);\n    }\n\n    if (nextFixed !== fixed) {\n      setFixed(nextFixed);\n      onChange === null || onChange === void 0 ? void 0 : onChange(nextFixed);\n    }\n  }, [fixed, offset, containerOffset, onChange, top]); // Add scroll event to window\n\n  useEventListener(window, 'scroll', handleScroll, false);\n  return fixed;\n}\n\nvar Affix = /*#__PURE__*/React.forwardRef(function (props, ref) {\n  var _merge;\n\n  var _props$as = props.as,\n      Component = _props$as === void 0 ? 'div' : _props$as,\n      _props$classPrefix = props.classPrefix,\n      classPrefix = _props$classPrefix === void 0 ? 'affix' : _props$classPrefix,\n      className = props.className,\n      children = props.children,\n      container = props.container,\n      _props$top = props.top,\n      top = _props$top === void 0 ? 0 : _props$top,\n      onChange = props.onChange,\n      rest = _objectWithoutPropertiesLoose(props, [\"as\", \"classPrefix\", \"className\", \"children\", \"container\", \"top\", \"onChange\"]);\n\n  var mountRef = useRef(null);\n  var offset = useOffset(mountRef);\n  var containerOffset = useContainerOffset(container);\n  var fixed = useFixed(offset, containerOffset, {\n    top: top,\n    onChange: onChange\n  });\n\n  var _useClassNames = useClassNames(classPrefix),\n      withClassPrefix = _useClassNames.withClassPrefix,\n      merge = _useClassNames.merge;\n\n  var classes = merge(className, (_merge = {}, _merge[withClassPrefix()] = fixed, _merge));\n  var placeholderStyles = fixed ? {\n    width: offset === null || offset === void 0 ? void 0 : offset.width,\n    height: offset === null || offset === void 0 ? void 0 : offset.height\n  } : undefined;\n  var fixedStyles = {\n    position: 'fixed',\n    top: top,\n    width: offset === null || offset === void 0 ? void 0 : offset.width,\n    zIndex: 10\n  };\n  var affixStyles = fixed ? fixedStyles : undefined;\n  return /*#__PURE__*/React.createElement(Component, _extends({}, rest, {\n    ref: mergeRefs(mountRef, ref)\n  }), /*#__PURE__*/React.createElement(\"div\", {\n    className: classes,\n    style: affixStyles\n  }, children), fixed && /*#__PURE__*/React.createElement(\"div\", {\n    \"aria-hidden\": true,\n    style: placeholderStyles\n  }));\n});\nAffix.displayName = 'Affix';\nexport default Affix;","import { useEffect, useRef } from 'react';\nimport { ResizeObserver } from '@juggle/resize-observer';\n/**\n * Attach the event handler directly to the specified DOM element,\n * and it will be triggered when the size of the DOM element is changed.\n *\n * @param eventTarget The target to listen for events on\n * @param listener An event handler\n */\n\nexport default function useElementResize(eventTarget, listener) {\n  var resizeObserver = useRef();\n  useEffect(function () {\n    if (!resizeObserver.current) {\n      var target = typeof eventTarget === 'function' ? eventTarget() : eventTarget;\n\n      if (target) {\n        resizeObserver.current = new ResizeObserver(listener);\n        resizeObserver.current.observe(target);\n      }\n    }\n\n    return function () {\n      var _resizeObserver$curre;\n\n      (_resizeObserver$curre = resizeObserver.current) === null || _resizeObserver$curre === void 0 ? void 0 : _resizeObserver$curre.disconnect();\n    };\n  }, [eventTarget, listener]);\n}","import Affix from './Affix';\nexport default Affix;"],"names":["callback","mountRef","useRef","current","useEffect","_mountRef$current","call","useEventListener","eventTarget","event","listener","capture","target","controller","on","off","useOffset","resizeObserver","_useState","useState","offset","setOffset","updateOffset","useCallback","getOffset","observe","_resizeObserver$curre","disconnect","window","Affix","props","ref","_merge","_props$as","as","Component","_props$classPrefix","classPrefix","className","children","container","_props$top","top","onChange","rest","containerOffset","_useState2","node","useContainerOffset","fixed","_useState3","setFixed","handleScroll","scrollY","pageYOffset","nextFixed","Number","height","useFixed","_useClassNames","useClassNames","withClassPrefix","classes","merge","placeholderStyles","width","undefined","fixedStyles","position","zIndex","affixStyles","mergeRefs","style","displayName"],"sourceRoot":""}