{"version":3,"file":"anchors.min.js","sources":["utils/types/isString.js","utils/lang/hasOwn.js","utils/lang/toString.js","utils/types/isFunction.js","utils/types/isObject.js","utils/observer/_subscribers.js","utils/observer/_hasDirectSubscribersFor.js","utils/observer/has.js","utils/observer/_hasSubscribers.js","utils/observer/emit.js","utils/types/isTypedArray.js","utils/lang/guid.js","utils/observer/_removeSubscriber.js","utils/observer/off.js","utils/observer/_removeSubscriberByToken.js","base.js","utils/lang/extend.js","utils/observer/on.js","utils/types/isElement.js","utils/lang/easeInQuad.js","utils/dom/_getScrollElement.js","utils/dom/offsetTop.js","utils/dom/matches.js","utils/dom/getParentOrHost.js","utils/event/enum.js","utils/event/_off.js","utils/event/_delete.js","utils/event/purgeElement.js","utils/event/getListeners.js","utils/event/off.js","utils/event/on.js","utils/event/getTarget.js","utils/dom/resolveTextNode.js","utils/dom/closest.js","utils/types/isArray.js","utils/icons/symbols.js","utils/icons/defaults.js","utils/icons/getSymbols.js","utils/icons/getSymbol.js","utils/icons/paint.js","utils/icons/add.js","utils/lang/trim.js","utils/types/isDOM.js","utils/types/isHTMLCollection.js","utils/types/isFragment.js","utils/types/isTextNode.js","utils/dom/setAttribute.js","utils/types/isSVG.js","utils/icons/icon.js","utils/icons/createElement.js","_updateHeading.js","utils/dom/createElement.js","utils/dom/removeClass.js","utils/dom/hasClass.js","_resetHeading.js","utils/types/isEmpty.js","getChapters.js","utils/lang/stripTags.js","_getChapterParentIdByDiffer.js","_getChaptersWithCode.js","anchors.js","utils/lang/toTree.js","utils/dom/scrollTo.js","utils/lang/later.js","utils/event/stop.js"],"sourcesContent":["/**\n * 检测数据是否为 String 类型\n * ========================================================================\n * @method isArray\n * @param {*} str\n * @returns {boolean}\n */\nconst isString = (str) => {\n  return typeof str === 'string'\n}\n\nexport default isString\n","/**\n * 检测对象自身属性中是否具有指定的属性。\n * ========================================================================\n * @method hasOwn\n * @param {Object} obj - （必须）检测的目标对象\n * @param {String} prop - （必须）属性名\n * @returns {Boolean}\n */\nconst hasOwn = (obj, prop) => {\n  const hasOwnProperty = Object.prototype.hasOwnProperty\n  return obj && hasOwnProperty.call(obj, prop)\n}\n\nexport default hasOwn\n","/**\n * Object 对象原型上的 toString 方法\n * ========================================================================\n * @method toString\n * @param {*} val\n * @returns {string}\n */\nconst toString = (val) => {\n  return Object.prototype.toString.apply(val)\n}\n\nexport default toString\n","import toString from '../lang/toString'\n\n/**\n * 检测测试数据是否为 Function 类型\n * ========================================================================\n * @method isFunction\n * @param {*} val - （必须）待检测的数据\n * @returns {boolean} 'val' 是 Function 类型返回 true，否则返回 false\n */\nconst isFunction = (val) => {\n  return typeof val === 'function' || toString(val) === '[object Function]'\n}\n\nexport default isFunction\n","import toString from '../lang/toString'\nimport isFunction from './isFunction'\n\n/**\n * 检测数据是否为 Object 类型\n * ========================================================================\n * @method isObject\n * @param {*} o\n * @returns {boolean}\n */\nconst isObject = (o) => {\n  return (\n    (toString(o) === '[object Object]' ||\n      typeof o === 'object' ||\n      isFunction(o)) &&\n    o !== null\n  )\n}\n\nexport default isObject\n","/**\n * 存储订阅者（主题和处理器的）私有对象\n * ========================================================================\n * @type {{}}\n * @private\n */\nconst _subscribers = {}\n\nexport default _subscribers\n","import _subscribers from './_subscribers'\nimport hasOwn from '../lang/hasOwn'\n\n/**\n * 判断是否存在与给定 topic 完全匹配的订阅者信息\n * ========================================================================\n * @method _hasDirectSubscribersFor\n * @param {String} topic - （必须）订阅主题字符串\n * @returns {Boolean}\n */\nconst _hasDirectSubscribersFor = (topic) => {\n  return hasOwn(_subscribers, topic) && _subscribers[topic].length > 0\n}\n\nexport default _hasDirectSubscribersFor\n","import _hasDirectSubscribersFor from './_hasDirectSubscribersFor'\nimport _hasSubscribers from './_hasSubscribers'\n\n/**\n * 判断是否存在包含 topic 指定的订阅者信息\n * ========================================================================\n * @method has\n * @param {String} topic - （必须）主题名称\n * @param {Boolean} [isDirect] - （可选）是否为直接的主题，默认值：true\n * @returns {Boolean}\n */\nconst has = (topic, isDirect = true) => {\n  return isDirect ? _hasDirectSubscribersFor(topic) : _hasSubscribers(topic)\n}\n\nexport default has\n","import _hasDirectSubscribersFor from './_hasDirectSubscribersFor'\n\n/**\n * 判断是否存在包含给定 topic 相关的订阅者信息\n * ========================================================================\n * @method _hasSubscribers\n * @param {String} topic - （必须）订阅主题字符串\n * @returns {Boolean}\n */\nconst _hasSubscribers = (topic) => {\n  let found = _hasDirectSubscribersFor(topic)\n  let position = topic.lastIndexOf('.')\n\n  while (!found && position !== -1) {\n    topic = topic.substring(0, position)\n    position = topic.lastIndexOf('.')\n    found = _hasDirectSubscribersFor(topic)\n  }\n\n  return found\n}\n\nexport default _hasSubscribers\n","import isTypedArray from '../types/isTypedArray'\nimport _subscribers from './_subscribers'\nimport has from './has'\nimport _hasDirectSubscribersFor from './_hasDirectSubscribersFor'\n\n/**\n * （异步）发布订阅主题信息\n * ========================================================================\n * 主题默认是异步发布的。确保在消费者处理主题时，主题的发起者不会被阻止。\n * ========================================================================\n * @method emit\n * @param {String} topic - （必须）主题名称\n * @param {Object} [data] - （可选）数据对象\n * @param {Boolean} [async] - (可选) 是否异步发布\n */\nconst emit = (topic, data, async = true) => {\n  const execute = (topic) => {\n    if (!_hasDirectSubscribersFor(topic)) {\n      return false\n    }\n\n    _subscribers[topic].forEach((subscriber) => {\n      // 针对 mqtt 消息服务返回的 Uint8Array 类似的 typed arrays 格式的数据\n      // 采用 toString() 方法转化为普通（JSON）字符串\n      const message = isTypedArray(data) ? data.toString() : data\n\n      subscriber.callback.call(subscriber.context || subscriber, message)\n    })\n  }\n  const deliver = () => {\n    let subscriber = topic\n    let position = topic.lastIndexOf('.')\n\n    while (position !== -1) {\n      subscriber = subscriber.substring(0, position)\n      position = subscriber.lastIndexOf('.')\n\n      execute(subscriber)\n    }\n\n    // 执行 topic 对应的处理器\n    execute(topic)\n    // 执行特殊 topic：'*'（监听全部消息的发布）\n    execute('*')\n  }\n\n  if (!has(topic)) {\n    return false\n  }\n\n  if (async) {\n    setTimeout(deliver, 10)\n  } else {\n    deliver()\n  }\n}\n\nexport default emit\n","import toString from '../lang/toString'\n/**\n * 判断检测数据是否为 Typed Arrays 类型的数据\n * ========================================================================\n * @param {*} val\n * @returns {boolean}\n */\nconst isTypedArray = (val) => {\n  const TYPES = [\n    '[object Int8Array]',\n    '[object Uint8Array]',\n    '[object Uint8ClampedArray]',\n    '[object Int16Array]',\n    '[object Uint16Array]',\n    '[object Int32Array]',\n    '[object Uint32Array]',\n    '[object Float32Array]',\n    '[object Float64Array]',\n    '[object BigInt64Array]',\n    '[object BigUint64Array]'\n  ]\n\n  return TYPES.indexOf(toString(val)) > -1\n}\n\nexport default isTypedArray\n","/**\n * 生成唯一 id 字符串的函数\n * ========================================================================\n * @method guid\n * @param {String} [prefix] - 生成 id 的前缀字符串\n * @return {String} 返回一个表示唯一 id 的字符串\n */\nconst guid = (() => {\n  let uuid = 0\n\n  return (prefix) => {\n    uuid += 1\n\n    return prefix ? prefix + '-' + uuid : 'guid-' + uuid\n  }\n})()\n\nexport default guid\n","import _subscribers from './_subscribers'\nimport hasOwn from '../lang/hasOwn'\n\n/**\n * 删除与给定 topic 相同的订阅者信息\n * ========================================================================\n * @method _removeSubscriber\n * @param {String} topic - （必须）订阅主题字符串\n * @returns {Boolean}\n */\nconst _removeSubscriber = (topic) => {\n  if (!hasOwn(_subscribers, topic)) {\n    return false\n  }\n\n  delete _subscribers[topic]\n}\n\nexport default _removeSubscriber\n","import has from './has'\nimport _removeSubscriber from './_removeSubscriber'\nimport _removeSubscriberByToken from './_removeSubscriberByToken'\n\n/**\n * 取消订阅主题\n * ========================================================================\n * @method off\n * @param {String} topic - （必须）订阅的主题\n * @param {Function|String} [token] - （可选）订阅主题的处理器函数或者唯一 Id 值\n */\nconst off = (topic, token) => {\n  if (!has(topic)) {\n    return false\n  }\n\n  if (token) {\n    _removeSubscriberByToken(token)\n  } else {\n    _removeSubscriber(topic)\n  }\n}\n\nexport default off\n","import _subscribers from './_subscribers'\nimport _removeSubscriber from './_removeSubscriber'\n\n/**\n * 通过订阅者 token 值删除订阅者信息\n * ========================================================================\n * @method _removeSubscriberByToken\n * @param {String} token - 订阅者 token 字符串\n * @returns {boolean}\n * @private\n */\nconst _removeSubscriberByToken = (token) => {\n  const keys = Object.keys(_subscribers)\n  let index = -1\n\n  if (!token || keys.length < 1) {\n    return false\n  }\n\n  keys.forEach((subject) => {\n    const subscriber = _subscribers[subject]\n    let topic\n\n    subscriber.forEach((execution, j) => {\n      if (execution.callback === token || execution.token === token) {\n        topic = execution.topic\n        subscriber.splice(index, j)\n      }\n    })\n\n    /* istanbul ignore else */\n    if (subscriber.length < 1) {\n      _removeSubscriber(topic)\n    }\n  })\n}\n\nexport default _removeSubscriberByToken\n","import isString from './utils/types/isString'\r\nimport hasOwn from './utils/lang/hasOwn'\r\nimport isObject from './utils/types/isObject'\r\nimport extend from './utils/lang/extend'\r\nimport publish from './utils/observer/emit'\r\nimport subscribe from './utils/observer/on'\r\nimport unsubscribe from './utils/observer/off'\r\n\r\nclass Base {\r\n  constructor(options) {\r\n    this.attrs = {}\r\n\r\n    if (options) {\r\n      this.initialize(options)\r\n    }\r\n  }\r\n\r\n  initialize(options) {\r\n    this.attr(options).render().addListeners()\r\n    return this\r\n  }\r\n\r\n  attr(prop, value) {\r\n    const attrs = this.attrs\r\n\r\n    if (isString(prop)) {\r\n      // 只能扩展 attrs 中已有的属性\r\n      if (value && hasOwn(attrs, prop)) {\r\n        // 更新单个配置信息\r\n        attrs[prop] = value\r\n        return this\r\n      }\r\n\r\n      // 只传递 prop 参数，则返回对应的属性值\r\n      return attrs[prop]\r\n    } else if (isObject(prop)) {\r\n      // 批量更新配置信息\r\n      extend(attrs, prop)\r\n\r\n      return this\r\n    } else if (arguments.length === 0) {\r\n      // 不传递参数，直接返回整个\r\n      return attrs\r\n    }\r\n\r\n    return this\r\n  }\r\n\r\n  render() {\r\n    return this\r\n  }\r\n\r\n  destroy() {\r\n    this.removeListeners()\r\n    return this\r\n  }\r\n\r\n  reload(options) {\r\n    this.destroy().initialize(this.attr(options))\r\n    return this\r\n  }\r\n\r\n  $emit(event, data) {\r\n    publish(event, data)\r\n    return this\r\n  }\r\n\r\n  $on(event, callback) {\r\n    subscribe(event, callback, this)\r\n    return this\r\n  }\r\n\r\n  $off(event, callback) {\r\n    unsubscribe(event, callback)\r\n    return this\r\n  }\r\n\r\n  addListeners() {\r\n    return this\r\n  }\r\n\r\n  removeListeners() {\r\n    return this\r\n  }\r\n}\r\n\r\nexport default Base\r\n","import hasOwn from './hasOwn'\n\n/**\n * 扩展对象\n * ========================================================================\n * @method extend\n * @param {Object} origin\n * @param {Object} source\n */\nconst extend = (origin, source) => {\n  const keys = Object.keys(source)\n\n  keys.forEach((prop) => {\n    if (hasOwn(source, prop)) {\n      origin[prop] = source[prop]\n    }\n  })\n}\n\nexport default extend\n","import _subscribers from './_subscribers'\nimport isFunction from '../types/isFunction'\nimport guid from '../lang/guid'\n\n/**\n * 订阅主题，并给出处理器函数\n * ========================================================================\n * @method on\n * @param {String} topic - （必须）主题名称\n * @param {Function} handler - （必须）主题的处理器函数\n * @param {Object} [context] - （可选）指定 this 执行上下文\n * @return {String} - 唯一的 token 字符串，例如：'guid-1'。\n */\nconst on = (topic, handler, context = null) => {\n  const token = guid()\n  let subject = typeof topic === 'symbol' ? topic.toString() : topic\n\n  if (!isFunction(handler)) {\n    return ''\n  }\n\n  /* istanbul ignore else */\n  if (!_subscribers[subject]) {\n    _subscribers[subject] = []\n  }\n\n  _subscribers[subject].push({\n    topic: subject,\n    callback: handler,\n    context,\n    token\n  })\n\n  return token\n}\n\nexport default on\n","import isObject from './isObject'\n\n/**\n * 检测数据是否为 HTMLElement DOM 节点\n * ========================================================================\n * @method isElement\n * @param {*} o\n * @returns {boolean}\n */\nconst isElement = (o) => {\n  return !!(isObject(o) && o.nodeName && o.tagName && o.nodeType === 1)\n}\n\nexport default isElement\n","/**\n * 返回给定值的平方值\n * ========================================================================\n * @method easeInQuad\n * @param {Number} x\n * @returns {number}\n */\nconst easeInQuad = (x) => {\n  return x * x\n}\n\nexport default easeInQuad\n","import isString from '../types/isString'\nimport isElement from '../types/isElement'\n\n/**\n * 通过给的 scrollElement 参数，获取滚动 DOM 元素\n * ========================================================================\n * @method _getScrollElement\n * @param {String|HTMLElement} scrollElement\n * @returns {Element}\n * @private\n */\nconst _getScrollElement = (scrollElement = null) => {\n  let $rootElements\n  let $scrollElement\n\n  if (!scrollElement) {\n    $rootElements = document.querySelectorAll('html,body')\n    $scrollElement =\n      $rootElements[0].scrollTop - $rootElements[1].scrollTop >= 0\n        ? $rootElements[0]\n        : $rootElements[1]\n  } else {\n    if (isString(scrollElement)) {\n      $scrollElement = document.querySelector(scrollElement)\n    } else if (isElement(scrollElement)) {\n      $scrollElement = scrollElement\n    }\n  }\n\n  return $scrollElement\n}\n\nexport default _getScrollElement\n","/**\n * 获取 DOM 节点相对于窗口的 left （纵坐标）值\n * ========================================================================\n * @method offsetTop\n * @param {HTMLElement} el - DOM 节点\n * @returns {Number}\n */\nconst offsetTop = (el) => {\n  let top = el.offsetTop\n\n  if (el.offsetParent !== null) {\n    top += offsetTop(el.offsetParent)\n  }\n\n  return top\n}\n\nexport default offsetTop\n","/**\n * 获取 options 节点下匹配 selector 选择器的 DOM 节点\n * ========================================================================\n * Element.matches() 方法可以用来判断 DOM 元素是否与给定的选择器匹配，事件代理判断是\n * 否触发绑定的代理事件回调函数，关键就是使用 Element.matches() 辨别当前事件触发的目\n * 标 DOM 元素是否为事件代理所期望触发的目标。\n * ========================================================================\n * @method matches\n * @see https://developer.mozilla.org/en-US/docs/web/api/element/matches\n * @param {HTMLElement} el - （必须）DOM 元素\n * @param {String} selector - （必须）匹配 DOM 元素的选择器\n * @returns {Boolean}\n */\nconst matches = (el, selector = '') => {\n  const sel = selector.replace(/^>/i, '')\n\n  if (!selector || !sel || !el) {\n    return false\n  }\n\n  /* istanbul ignore else */\n  if (el.matches) {\n    return el.matches(sel)\n  } else if (el.msMatchesSelector) {\n    return el.msMatchesSelector(sel)\n  } else {\n    return false\n  }\n}\n\nexport default matches\n","/**\n * 获取 DOM 元素的父节点\n * ========================================================================\n * @method getParentOrHost\n * @param {*|HTMLElement} el - （必须）要获取父节点的 DOM 元素\n * @returns {*|HTMLElement}\n */\nconst getParentOrHost = (el) => {\n  return el.host && el !== document && el.host.nodeType\n    ? el.host\n    : el.parentNode\n}\n\nexport default getParentOrHost\n","export const CAPTURE_EVENTS = [\n  'focusout',\n  'blur',\n  'focusin',\n  'focus',\n  'load',\n  'unload',\n  'mouseenter',\n  'mouseleave'\n]\n","import { CAPTURE_EVENTS } from './enum'\nimport _delete from './_delete'\n\n/**\n * （私有方法）取消 type 类型的代理事件绑定\n * ========================================================================\n * 如果没有设置 handler，则销毁 this.$options 绑定的所有符合 type 事件类型的事件绑定\n * ========================================================================\n * @method _off\n * @param {HTMLElement} el - （必须）取消事件绑定的 DOM 元素\n * @param {String} type - （必须）事件类型\n * @param {Function} fn - （必须）事件处理器回调函数\n * @private\n */\nconst _off = (el, type, fn) => {\n  const capture = CAPTURE_EVENTS.indexOf(type) > -1\n\n  /* istanbul ignore else */\n  if (fn._delegateListener) {\n    fn = fn._delegateListener\n    delete fn._delegateListener\n  }\n\n  // 移除缓存的 _listeners 数据\n  _delete(el, type, fn)\n\n  el.removeEventListener(type, fn, capture)\n}\n\nexport default _off\n","/**\n * 删除 DOM 元素缓存的 _listeners 数据\n * ========================================================================\n * @method _delete\n * @param {HTMLElement} el - 要删除 listener 的 DOM 元素\n * @param {String} type - 事件类型（名称）\n * @param {Function} [fn] - 事件处理器回调函数\n */\nconst _delete = function (el, type, fn) {\n  const listeners = el._listeners\n  let index = -1\n\n  if (listeners.length < 1) {\n    return false\n  }\n\n  // 移除缓存的 _listeners 数据\n  listeners.forEach((listener, i) => {\n    const handler = listener.fn\n\n    if (type === listener.type) {\n      index = i\n\n      if (handler === fn) {\n        index = i\n      }\n    }\n  })\n\n  /* istanbul ignore else */\n  if (index > -1) {\n    listeners.splice(index, 1)\n  }\n}\n\nexport default _delete\n","import isString from '../types/isString'\nimport isElement from '../types/isElement'\nimport getListeners from './getListeners'\nimport _off from './_off'\n\n/**\n * 销毁（type 类型的）代理事件绑定\n * ========================================================================\n * 1. 设置了事件类型 type，则销毁指定类型的事件绑定，否则清除所有代理事件绑定\n * 2. recurse 设置为 true，递归销毁子节点全部事件绑定\n * ========================================================================\n * @method purgeElement\n * @param {HTMLElement|String} el - （必须）DOM 元素或者其选择器\n * @param {String|Boolean} type - （必须）事件类型\n * @param {Boolean} [recurse] - （可选）是否递归销毁子节点所有事件绑定\n */\nconst purgeElement = function (el, type, recurse = false) {\n  const $element = isString(el) ? document.querySelector(el) : el\n  const $children = $element.childNodes\n  const listeners = getListeners($element, type)\n\n  listeners.forEach((listener) => {\n    _off($element, listener.type, listener.fn)\n  })\n\n  if (\n    (recurse || type === true || arguments.length === 1) &&\n    $element &&\n    $children\n  ) {\n    $children.forEach(($child) => {\n      if (isElement($child)) {\n        purgeElement($child, type, recurse)\n      }\n    })\n  }\n}\n\nexport default purgeElement\n","import isString from '../types/isString'\n\n/**\n * 获取 DOM 元素（type 事件类型）事件绑定信息\n * ========================================================================\n * 如果设置了事件类型 type， 则返回指定类型的事件绑定信息，否则返回所有事件绑定信息\n * ========================================================================\n * @methods getListeners\n * @param {HTMLElement} el - （必须）要获取事件绑定信息的 DOM 元素\n * @param {String} [type] - （可选）事件类型\n * @returns {Array} - 已绑定的事件信息\n */\nconst getListeners = (el, type) => {\n  let listeners = el._listeners || []\n\n  if (isString(type) && type) {\n    listeners = listeners.filter((listener) => {\n      return listener.type === type\n    })\n  }\n\n  return listeners\n}\n\nexport default getListeners\n","import purgeElement from './purgeElement'\nimport isFunction from '../types/isFunction'\nimport _off from './_off'\n\n/**\n * 取消 type 类型的代理事件绑定\n * ========================================================================\n * 如果没有设置 handler，则销毁 this.$options 绑定的所有符合 type 事件类型的事件绑定\n * ========================================================================\n * @method off\n * @param {HTMLElement|Object} el - （必须）取消事件绑定的 DOM 元素\n * @param {String} type - （必须）事件类型\n * @param {Function} [fn] - （可选）事件处理器回调函数\n */\nconst off = (el, type, fn) => {\n  // 如果不设置 fn 参数，默认清除 el 元素上绑定的所有事件处理器\n  if (!isFunction(fn)) {\n    return purgeElement(el, type)\n  }\n\n  _off(el, type, fn)\n}\n\nexport default off\n","import closest from '../dom/closest'\nimport off from './off'\nimport getTarget from './getTarget'\n\nimport { CAPTURE_EVENTS } from './enum'\n\n/**\n * 绑定代理事件\n * ========================================================================\n * @method on\n * @param {HTMLElement|String|Object} el - （必须）绑定代理事件的 DOM 节点\n * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n * @param {String|Function} type - （必须）事件类型或者事件处理器回调函数\n * @param {Function|Object} fn - （可选） 事件处理器回调函数或者传递给事件处理器回调函数的数据对象\n * @param {Object|Boolean} [data] - （可选）传递给事件处理器回调函数的数据对象或者事件处理器回调函数的 this 上下文指向，\n * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向，或者是否仅触发一次\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n * @param {Boolean} once - （可选）是否仅触发一次\n */\nconst on = (el, selector, type, fn, data, context, once = false) => {\n  // CAPTURE_EVENTS 中的特殊事件，采用事件捕获模型\n  const capture = CAPTURE_EVENTS.indexOf(type) > -1\n\n  const listener = function (evt) {\n    const target = getTarget(evt)\n    // 通过 Element.matches 方法获得点击的目标元素\n    const delegateTarget = closest(target, selector, el)\n    let overrideContext = context || el\n\n    evt.delegateTarget = delegateTarget\n\n    // 当设置为 true 时，则事件处理器回调函数的\n    // this 上下文指向为 data 对象\n    if (context === true) {\n      overrideContext = data\n    }\n\n    /* istanbul ignore else */\n    if (delegateTarget) {\n      // 仅触发一次\n      /* istanbul ignore else */\n      if (once === true) {\n        off(el, type, listener)\n      }\n\n      fn.call(overrideContext, evt, data)\n    }\n  }\n\n  if (!el._listeners) {\n    el._listeners = []\n  }\n\n  // 缓存 options 元素绑定的事件处理器\n  el._listeners.push({\n    el,\n    selector,\n    type,\n    fn: listener,\n    data,\n    context,\n    capture\n  })\n\n  // 缓存包装后的事件处理器\n  fn._delegateListener = listener\n\n  el.addEventListener(type, listener, capture)\n}\n\nexport default on\n","import resolveTextNode from '../dom/resolveTextNode'\n\n/**\n * 返回触发事件的 target DOM 元素\n * ========================================================================\n * @method getTarget\n * @param {Event} evt - Event 对象\n * @return {HTMLElement} - Event 对象的 target DOM 元素\n */\nconst getTarget = function (evt) {\n  const target = evt.target\n\n  return resolveTextNode(target)\n}\n\nexport default getTarget\n","/**\n * 在某些情况下，某些浏览器（例如：Safari 浏览器）会返回实际的目标元素内部的文本节点。\n * resolveTextNode() 方法则会返回实际的目标节点。\n * ========================================================================\n * @method resolveTextNode\n * @param {HTMLElement|Text} el - 要解析的节点\n * @return {*|HTMLElement} - 实际的目标 DOM 节点\n */\nconst resolveTextNode = function (el) {\n  if (el && el.nodeType === 3) {\n    return el.parentNode\n  }\n\n  return el\n}\n\nexport default resolveTextNode\n","import matches from './matches'\nimport getParentOrHost from './getParentOrHost'\n\n/**\n * 获取 options 元素父元素最近的包含 selector 选择器的元素\n * ========================================================================\n * @method closest\n * @param {HTMLElement} el - （必须）DOM 元素\n * @param {String} selector - （必须）DOM 元素的选择其\n * @param {HTMLElement} [ctx] - （必须）比对的 DOM 元素\n * @param {Boolean} [includeCTX] - （必须）是否包含 context DOM 元素\n * @returns {null|HTMLElement} - 返回最接近的 DOM 元素\n */\nconst closest = (el, selector, ctx, includeCTX) => {\n  const context = ctx || document\n\n  if (!el) {\n    return null\n  }\n\n  do {\n    /* istanbul ignore else */\n    if (\n      (selector != null &&\n        (selector.startsWith('>')\n          ? el.parentNode === context && matches(el, selector)\n          : matches(el, selector))) ||\n      (includeCTX && el === context)\n    ) {\n      return el\n    }\n\n    /* istanbul ignore else */\n    if (el === context) {\n      break\n    }\n\n    /* jshint boss:true */\n  } while ((el = getParentOrHost(el)))\n}\n\nexport default closest\n","import toString from '../lang/toString'\n\n/**\n * 检测数据是否为 Array 类型\n * ========================================================================\n * @method isArray\n * @param {*} o\n * @returns {boolean}\n */\nconst isArray = (o) => {\n  if (Array.isArray) {\n    return Array.isArray(o)\n  } else {\n    return toString(o) === '[object Array]'\n  }\n}\n\nexport default isArray\n","import DEFAULTS from './defaults'\n\nconst SYMBOLS = [...DEFAULTS]\n\nexport default SYMBOLS\n","const DEFAULTS = [\n  '<symbol id=\"outline-icon-up\" viewBox=\"0 0 1024 1024\"><path d=\"M494.784 261.696c0.832-0.448 1.536-1.216 2.368-1.536a38.72 38.72 0 0 1 46.08 8.256l277.824 302.272a41.92 41.92 0 0 1-1.536 58.048 39.104 39.104 0 0 1-56.448-1.6L513.728 355.904 260.736 626.048a39.104 39.104 0 0 1-56.448 1.088 41.6 41.6 0 0 1-1.088-57.984L483.84 269.696c0.512-0.512 1.344-0.768 1.92-1.408l1.088-1.344c2.368-2.496 5.312-3.648 8-5.248z\"></path></symbol>',\n  '<symbol id=\"outline-icon-down\" viewBox=\"0 0 1024 1024\"><path d=\"M494.784 762.304c0.832 0.448 1.536 1.216 2.368 1.536 15.232 7.488 33.92 4.992 46.08-8.256l277.824-302.272a41.92 41.92 0 0 0-1.536-58.048 39.104 39.104 0 0 0-56.448 1.6l-249.344 271.232-252.992-270.144a39.104 39.104 0 0 0-56.448-1.088 41.6 41.6 0 0 0-1.088 57.984l280.576 299.456c0.512 0.512 1.344 0.768 1.92 1.408l1.088 1.344c2.368 2.496 5.312 3.648 8 5.248z\"></path></symbol>',\n  '<symbol id=\"outline-icon-menu\" viewBox=\"0 0 1024 1024\"><path d=\"M320 256h640V128H320zM320 576h640V448H320zM320 896h640v-128H320zM64 256h128V128H64zM64 576h128V448H64zM64 896h128v-128H64z\"></path></symbol>',\n  '<symbol id=\"outline-icon-file\" viewBox=\"0 0 1024 1024\"><path d=\"M320 640h256v128H320z\"></path><path d=\"M320 448h384v128H320z\"></path><path d=\"M640 0l320 320v557.696C960 958.528 909.824 1024 848 1024H176C114.176 1024 64 958.528 64 877.696V146.304C64 65.472 114.176 0 176 0H640z m0 128H192v768h640V320h-192V128z\"></path></symbol>',\n  '<symbol id=\"outline-icon-hash\" viewBox=\"0 0 24 24\"><path d=\"M14.216 10l-0.444 4h-3.988l0.444-4zM15.006 2.89l-0.568 5.11h-3.988l0.543-4.89c0.061-0.549-0.335-1.043-0.883-1.104s-1.043 0.335-1.104 0.884l-0.568 5.11h-4.438c-0.552 0-1 0.448-1 1s0.448 1 1 1h4.216l-0.444 4h-3.772c-0.552 0-1 0.448-1 1s0.448 1 1 1h3.549l-0.543 4.89c-0.061 0.549 0.335 1.043 0.883 1.104s1.043-0.335 1.104-0.883l0.569-5.111h3.988l-0.543 4.89c-0.061 0.549 0.335 1.043 0.883 1.104s1.043-0.335 1.104-0.883l0.568-5.111h4.438c0.552 0 1-0.448 1-1s-0.448-1-1-1h-4.216l0.444-4h3.772c0.552 0 1-0.448 1-1s-0.448-1-1-1h-3.549l0.543-4.89c0.061-0.549-0.335-1.043-0.883-1.104s-1.043 0.335-1.104 0.883z\"></path></symbol>',\n  '<symbol id=\"outline-icon-close\" viewBox=\"0 0 1024 1024\"><path d=\"M536.96 491.648L310.592 265.344a32 32 0 1 0-45.248 45.248L491.584 536.96l-226.304 226.304a32 32 0 0 0 45.312 45.248l226.24-226.304 226.304 226.304a32 32 0 0 0 45.248-45.248L582.144 536.896l226.304-226.24a32 32 0 0 0-45.248-45.248L536.896 491.584z\"></path></symbol>',\n  '<symbol id=\"outline-icon-homepage\" viewBox=\"0 0 26 28\"><path d=\"M22 15.5v7.5c0 0.547-0.453 1-1 1h-6v-6h-4v6h-6c-0.547 0-1-0.453-1-1v-7.5c0-0.031 0.016-0.063 0.016-0.094l8.984-7.406 8.984 7.406c0.016 0.031 0.016 0.063 0.016 0.094zM25.484 14.422l-0.969 1.156c-0.078 0.094-0.203 0.156-0.328 0.172h-0.047c-0.125 0-0.234-0.031-0.328-0.109l-10.813-9.016-10.813 9.016c-0.109 0.078-0.234 0.125-0.375 0.109-0.125-0.016-0.25-0.078-0.328-0.172l-0.969-1.156c-0.172-0.203-0.141-0.531 0.063-0.703l11.234-9.359c0.656-0.547 1.719-0.547 2.375 0l3.813 3.187v-3.047c0-0.281 0.219-0.5 0.5-0.5h3c0.281 0 0.5 0.219 0.5 0.5v6.375l3.422 2.844c0.203 0.172 0.234 0.5 0.063 0.703z\"></path></symbol>',\n  '<symbol id=\"outline-icon-github\" viewBox=\"0 0 24 28\"><path d=\"M12 2c6.625 0 12 5.375 12 12 0 5.297-3.437 9.797-8.203 11.391-0.609 0.109-0.828-0.266-0.828-0.578 0-0.391 0.016-1.687 0.016-3.297 0-1.125-0.375-1.844-0.812-2.219 2.672-0.297 5.484-1.313 5.484-5.922 0-1.313-0.469-2.375-1.234-3.219 0.125-0.313 0.531-1.531-0.125-3.187-1-0.313-3.297 1.234-3.297 1.234-0.953-0.266-1.984-0.406-3-0.406s-2.047 0.141-3 0.406c0 0-2.297-1.547-3.297-1.234-0.656 1.656-0.25 2.875-0.125 3.187-0.766 0.844-1.234 1.906-1.234 3.219 0 4.594 2.797 5.625 5.469 5.922-0.344 0.313-0.656 0.844-0.766 1.609-0.688 0.313-2.438 0.844-3.484-1-0.656-1.141-1.844-1.234-1.844-1.234-1.172-0.016-0.078 0.734-0.078 0.734 0.781 0.359 1.328 1.75 1.328 1.75 0.703 2.141 4.047 1.422 4.047 1.422 0 1 0.016 1.937 0.016 2.234 0 0.313-0.219 0.688-0.828 0.578-4.766-1.594-8.203-6.094-8.203-11.391 0-6.625 5.375-12 12-12zM4.547 19.234c0.031-0.063-0.016-0.141-0.109-0.187-0.094-0.031-0.172-0.016-0.203 0.031-0.031 0.063 0.016 0.141 0.109 0.187 0.078 0.047 0.172 0.031 0.203-0.031zM5.031 19.766c0.063-0.047 0.047-0.156-0.031-0.25-0.078-0.078-0.187-0.109-0.25-0.047-0.063 0.047-0.047 0.156 0.031 0.25 0.078 0.078 0.187 0.109 0.25 0.047zM5.5 20.469c0.078-0.063 0.078-0.187 0-0.297-0.063-0.109-0.187-0.156-0.266-0.094-0.078 0.047-0.078 0.172 0 0.281s0.203 0.156 0.266 0.109zM6.156 21.125c0.063-0.063 0.031-0.203-0.063-0.297-0.109-0.109-0.25-0.125-0.313-0.047-0.078 0.063-0.047 0.203 0.063 0.297 0.109 0.109 0.25 0.125 0.313 0.047zM7.047 21.516c0.031-0.094-0.063-0.203-0.203-0.25-0.125-0.031-0.266 0.016-0.297 0.109s0.063 0.203 0.203 0.234c0.125 0.047 0.266 0 0.297-0.094zM8.031 21.594c0-0.109-0.125-0.187-0.266-0.172-0.141 0-0.25 0.078-0.25 0.172 0 0.109 0.109 0.187 0.266 0.172 0.141 0 0.25-0.078 0.25-0.172zM8.937 21.438c-0.016-0.094-0.141-0.156-0.281-0.141-0.141 0.031-0.234 0.125-0.219 0.234 0.016 0.094 0.141 0.156 0.281 0.125s0.234-0.125 0.219-0.219z\"></path></symbol>',\n  '<symbol id=\"outline-icon-issues\" viewBox=\"0 0 24 28\"><path d=\"M25.5 15c0 0.547-0.453 1-1 1h-3.5c0 1.953-0.422 3.422-1.047 4.531l3.25 3.266c0.391 0.391 0.391 1.016 0 1.406-0.187 0.203-0.453 0.297-0.703 0.297s-0.516-0.094-0.703-0.297l-3.094-3.078s-2.047 1.875-4.703 1.875v-14h-2v14c-2.828 0-4.891-2.063-4.891-2.063l-2.859 3.234c-0.203 0.219-0.469 0.328-0.75 0.328-0.234 0-0.469-0.078-0.672-0.25-0.406-0.375-0.438-1-0.078-1.422l3.156-3.547c-0.547-1.078-0.906-2.469-0.906-4.281h-3.5c-0.547 0-1-0.453-1-1s0.453-1 1-1h3.5v-4.594l-2.703-2.703c-0.391-0.391-0.391-1.016 0-1.406s1.016-0.391 1.406 0l2.703 2.703h13.188l2.703-2.703c0.391-0.391 1.016-0.391 1.406 0s0.391 1.016 0 1.406l-2.703 2.703v4.594h3.5c0.547 0 1 0.453 1 1zM18 6h-10c0-2.766 2.234-5 5-5s5 2.234 5 5z\"></path></symbol>',\n  '<symbol id=\"outline-icon-tags\" viewBox=\"0 0 26 28\"><path d=\"M7 7c0-1.109-0.891-2-2-2s-2 0.891-2 2 0.891 2 2 2 2-0.891 2-2zM23.672 16c0 0.531-0.219 1.047-0.578 1.406l-7.672 7.688c-0.375 0.359-0.891 0.578-1.422 0.578s-1.047-0.219-1.406-0.578l-11.172-11.188c-0.797-0.781-1.422-2.297-1.422-3.406v-6.5c0-1.094 0.906-2 2-2h6.5c1.109 0 2.625 0.625 3.422 1.422l11.172 11.156c0.359 0.375 0.578 0.891 0.578 1.422zM29.672 16c0 0.531-0.219 1.047-0.578 1.406l-7.672 7.688c-0.375 0.359-0.891 0.578-1.422 0.578-0.812 0-1.219-0.375-1.75-0.922l7.344-7.344c0.359-0.359 0.578-0.875 0.578-1.406s-0.219-1.047-0.578-1.422l-11.172-11.156c-0.797-0.797-2.312-1.422-3.422-1.422h3.5c1.109 0 2.625 0.625 3.422 1.422l11.172 11.156c0.359 0.375 0.578 0.891 0.578 1.422z\"></path></symbol>'\n]\n\nexport default DEFAULTS\n","import isString from '../types/isString'\nimport getSymbol from './getSymbol'\nimport SYMBOLS from './symbols'\n\n/**\n *\n * @method getSymbols\n * @param {String} [name]\n * @param {String} [iconSet]\n * @returns {string[]|*}\n */\nconst getSymbols = (name, iconSet = 'icon') => {\n  if (isString(name)) {\n    return getSymbol(name, iconSet)\n  }\n\n  return [...SYMBOLS]\n}\n\nexport default getSymbols\n","import SYMBOLS from './symbols'\n\n/**\n * @method getSymbol\n * @param {String} name\n * @param {String} [iconSet]\n * @returns {String}\n */\nconst getSymbol = (name, iconSet = 'icon') => {\n  const patternName = /id=\"(.*?)\"/\n  const patternSet = /^(\\w+)-/\n  const symbols = SYMBOLS\n\n  return symbols.find((symbol) => {\n    const names = patternName.exec(symbol)\n    const fullName = names[1]\n    const sets = patternSet.exec(fullName)\n    const setName = sets[1]\n    const iconName =\n      iconSet === 'icon' ? `${iconSet}-${name}` : `${iconSet}-icon-${name}`\n\n    return setName === iconSet && fullName === iconName\n  })\n}\n\nexport default getSymbol\n","import add from './add'\nimport getSymbols from './getSymbols'\n\n/**\n * 绘制 SVG 图标集\n * ========================================================================\n * @method paint\n * @param {String|Array} symbol\n */\nconst paint = (symbol = '') => {\n  const $body = document.body\n  let $icons = document.querySelector('#outline-icons')\n  let symbols = []\n\n  add(symbol)\n  symbols = getSymbols()\n\n  if ($icons) {\n    $icons.innerHTML = symbols.join('')\n  } else {\n    $icons = document.createElement('div')\n    $icons.innerHTML =\n      `<svg id=\"outline-icons\" aria-hidden=\"true\" style=\"position:absolute;display:none;width:0;height:0;overflow:hidden;\">` +\n      `${symbols.join('')}` +\n      `</svg>`\n    $body.insertBefore($icons.firstChild, $body.firstChild)\n  }\n}\n\nexport default paint\n","import isArray from '../types/isArray'\nimport isString from '../types/isString'\nimport SYMBOLS from './symbols'\n\n/**\n * @method add\n * @param {Array|String} symbols\n * @return {Boolean}\n */\nconst add = (symbols) => {\n  if (!symbols) {\n    return false\n  }\n\n  if (isArray(symbols) && symbols.length > 0) {\n    symbols.forEach((symbol) => {\n      /* istanbul ignore else */\n      if (SYMBOLS.indexOf(symbol) === -1 && isString(symbol)) {\n        SYMBOLS.push(symbol)\n      }\n    })\n  } else {\n    /* istanbul ignore else */\n    if (isString(symbols)) {\n      SYMBOLS.push(symbols)\n    }\n  }\n}\n\nexport default add\n","import isString from '../types/isString'\n\n/**\n * 清楚字符串起始位置所有的空格\n * ========================================================================\n * @method trim\n * @param {string} str\n * @returns {string|Boolean}\n */\nconst trim = (str) => {\n  if (!isString(str)) {\n    return false\n  }\n  return str.replace(/(^\\s+)|(\\s+$)/g, '')\n}\n\nexport default trim\n","import isObject from './isObject'\r\nimport isElement from './isElement'\r\nimport isHTMLCollection from './isHTMLCollection'\r\nimport isFragment from './isFragment'\r\nimport isTextNode from './isTextNode'\r\n\r\nconst isDOM = (el) => {\r\n  return !!(\r\n    isObject(el) &&\r\n    (isElement(el) || isHTMLCollection(el) || isFragment(el) || isTextNode(el))\r\n  )\r\n}\r\n\r\nexport default isDOM\r\n","import toString from '../lang/toString'\r\nimport isObject from './isObject'\r\n\r\nconst isHTMLCollection = (el) => {\r\n  return !!(isObject(el) && toString(el) === '[object NodeList]')\r\n}\r\n\r\nexport default isHTMLCollection\r\n","import toString from '../lang/toString'\nimport isObject from './isObject'\n\nconst isFragment = (fragment) => {\n  return !!(\n    isObject(fragment) && toString(fragment) === '[object DocumentFragment]'\n  )\n}\n\nexport default isFragment\n","import toString from '../lang/toString'\r\nimport isObject from './isObject'\r\n\r\nconst isTextNode = (el) => {\r\n  return !!(\r\n    isObject(el) &&\r\n    (toString(el) === '[object Text]' || (el.tagName && el.nodeType === 3))\r\n  )\r\n}\r\n\r\nexport default isTextNode\r\n","/**\n * 给 DOM 节点设置属性/值\n * ========================================================================\n * @method setAttribute\n * @param {HTMLElement} el - DOM 节点\n * @param {String} attr - 属性名称\n * @param {String|Number|Boolean} value - 属性值\n */\nconst setAttribute = (el, attr, value) => {\n  let tagName = el.tagName.toLowerCase()\n\n  switch (attr) {\n    case 'style':\n      el.style.cssText = value\n      break\n    case 'value':\n      if (tagName === 'input' || tagName === 'textarea') {\n        el.value = value\n      } else {\n        el.setAttribute(attr, value)\n      }\n      break\n    case 'className':\n      el.className = value\n      break\n    default:\n      el.setAttribute(attr, value)\n      break\n  }\n}\n\nexport default setAttribute\n","import isString from './isString'\n\nconst isSVG = (str) => {\n  const declaration = '(?:<\\\\?xml[^>]*>\\\\s*)?'\n  const doctype =\n    '(?:<\\\\!doctype svg[^>]*\\\\s*(?:\\\\[?(?:\\\\s*<![^>]*>\\\\s*)*\\\\]?)*[^>]*>\\\\s*)?'\n  const content = '<svg[^>]*>[^]*<\\\\/svg>\\\\s*$'\n  const svg = `^\\\\s*${declaration}${doctype}${content}\\\\s*$`\n  const pattern = new RegExp(svg, 'i')\n\n  return isString(str) && pattern.test(str)\n}\n\nexport default isSVG\n","import createElement from './createElement'\n\n/**\n * 创建 SVG 图标 DOM 元素\n * ========================================================================\n * @method icon\n * @alias createElement\n * @see createElement\n * @param {String} name\n * @param {Object} [options]\n * @param {Number|Array} [options.size]\n * @param {String} [options.color]\n * @param {String} [options.iconSet]\n * @returns {HTMLElement}\n */\nconst icon = (name, options = {}) => {\n  return createElement(name, options)\n}\n\nexport default icon\n","import isArray from '../types/isArray'\nimport isString from '../types/isString'\nimport isSVG from '../types/isSVG'\n\n/**\n * 创建 SVG 图标 DOM 元素\n * ========================================================================\n * @method createElement\n * @param {String} name\n * @param {Object} [options]\n * @param {Number|Array} [options.size]\n * @param {String} [options.color]\n * @param {String} [options.iconSet]\n * @returns {HTMLElement}\n */\nconst createElement = (name, options = {}) => {\n  const size = options.size || 0\n  const color = options.color || ''\n  const iconSet = options.iconSet || ''\n  const width = isArray(size) ? size[0] : size\n  const height = isArray(size) ? size[1] : size\n  const defaultRules = size ? `width:${width}px;height:${height}px;` : ''\n  const cssRules = color ? defaultRules + `color:${color}` : defaultRules\n  const $icon = document.createElement('i')\n  let binds = ''\n  let svg = ''\n  let $svg\n\n  if (!isString(name)) {\n    return null\n  }\n\n  if (isSVG(name)) {\n    svg = name\n  } else {\n    binds =\n      iconSet && iconSet !== 'icon'\n        ? `xlink:href=\"#${iconSet}-icon-${name}\"`\n        : `xlink:href=\"#icon-${name}\"`\n    svg =\n      `<svg aria-hidden=\"true\" class=\"outline-icon__svg\" style=\"${cssRules}\">` +\n      `<use ${binds}></use>` +\n      `</svg>`\n  }\n\n  $icon.className = 'outline-icon'\n  $icon.innerHTML = svg\n\n  if (isSVG(name)) {\n    $svg = $icon.querySelector('svg')\n    $svg.setAttribute('aria-hidden', 'true')\n    $svg.setAttribute('xmlns', 'http://www.w3.org/2000/svg')\n    $svg.setAttribute('class', 'outline-icon__svg')\n    $svg.setAttribute('width', '200')\n    $svg.setAttribute('height', '200')\n    $svg.style.cssText = cssRules\n  }\n\n  return $icon\n}\n\nexport default createElement\n","import trim from './utils/lang/trim'\nimport createElement from './utils/dom/createElement'\nimport setAttribute from './utils/dom/setAttribute'\n\nimport icon from './utils/icons/icon'\n\nconst _updateHeading = ($heading, i, options) => {\n  const CLS_HEADING = 'outline-heading'\n  const hasAnchor = options.hasAnchor || true\n  const isAtStart = options.isAtStart || true\n  const showCode = options.showCode || false\n  const chapterCode = options.chapterCode || ''\n  const anchorURL = options.anchorURL || ''\n  const headingId = `heading-${i}`\n  const attrs = {\n    id: headingId,\n    className: isAtStart ? `${CLS_HEADING} ${CLS_HEADING}_start` : CLS_HEADING,\n    'data-id': i\n  }\n  const keys = Object.keys(attrs)\n  const text = trim($heading.innerHTML)\n  let $anchor\n  let $icon\n\n  keys.forEach((prop) => {\n    setAttribute($heading, prop, attrs[prop])\n  })\n\n  if (showCode) {\n    $heading.innerHTML = chapterCode + ' ' + text\n  }\n\n  if (!hasAnchor) {\n    return false\n  }\n\n  $icon = icon('hash', { iconSet: 'outline' })\n  $anchor = createElement(\n    'a',\n    {\n      id: `anchor-${i}`,\n      className: `${CLS_HEADING}__anchor anchor-${i}`,\n      href: anchorURL || `#${headingId}`,\n      target: anchorURL ? '_blank' : 'self',\n      'data-id': i\n    },\n    $icon\n  )\n  $heading.appendChild($anchor)\n}\n\nexport default _updateHeading\n","import hasOwn from '../lang/hasOwn'\nimport isObject from '../types/isObject'\nimport isString from '../types/isString'\nimport isArray from '../types/isArray'\nimport isDOM from '../types/isDOM'\nimport setAttribute from './setAttribute'\n\n/**\n * 创建 DOM 节点，并添加属性和子节点\n * ========================================================================\n * @method createElement\n * @param {String} tagName - 标签名称\n * @param {Object|Array} attrs - 属性对象或者子节点\n * @param {Array|HTMLElement|DocumentFragment|String} [children] - 子节点数组\n * @returns {HTMLElement}\n */\nconst createElement = (tagName, attrs, children) => {\n  const $fragment = document.createDocumentFragment()\n  const $el = document.createElement(tagName)\n  const isValidChild = (child) => {\n    return isDOM(child) || isString(child)\n  }\n  const append = (child) => {\n    let $child\n\n    if (!isValidChild(child)) {\n      return false\n    }\n\n    if (isDOM(child)) {\n      $child = child\n    } else if (isString(child)) {\n      $child = document.createTextNode(child)\n    }\n\n    $fragment.appendChild($child)\n  }\n\n  if (isObject(attrs)) {\n    Object.keys(attrs).forEach((attr) => {\n      if (hasOwn(attrs, attr)) {\n        setAttribute($el, attr, attrs[attr])\n      }\n    })\n  } else if (isArray(attrs) && attrs.every((attr) => isValidChild(attr))) {\n    attrs.forEach((child) => {\n      append(child)\n    })\n  }\n\n  if (isArray(children)) {\n    children.forEach((child) => {\n      append(child)\n    })\n  } else {\n    append(children)\n  }\n\n  $el.appendChild($fragment)\n\n  return $el\n}\n\nexport default createElement\n","import trim from '../lang/trim'\nimport hasClass from './hasClass'\n\n/**\n * 移除 DOM 节点的 className 样式\n * ========================================================================\n * @method removeClass\n * @param {HTMLElement} el - DOM 节点\n * @param {String} className - 样式名称\n * @returns {Boolean}\n */\nconst removeClass = (el, className) => {\n  let allClass = el.className\n  let classList\n\n  if (!allClass || !hasClass(el, className)) {\n    return false\n  }\n\n  classList = el.classList\n\n  if (classList?.remove) {\n    classList.remove(className)\n  } else {\n    allClass = trim(allClass.replace(className, ''))\n    el.className = allClass\n  }\n}\n\nexport default removeClass\n","import isElement from '../types/isElement'\n/**\n * 检测 DOM 节点是否包含名为 className 的样式\n * ========================================================================\n * @method hasClass\n * @param {HTMLElement} el - DOM 节点\n * @param {String} className - 样式名称\n * @returns {Boolean}\n */\nconst hasClass = (el, className) => {\n  const pattern = new RegExp('(\\\\s|^)' + className + '(\\\\s|$)')\n  let allClass\n  let classList\n\n  if (!isElement(el)) {\n    return false\n  }\n\n  allClass = el.className\n\n  if (!allClass) {\n    return false\n  }\n\n  classList = el.classList\n\n  if (classList?.contains) {\n    return el.classList.contains(className)\n  }\n\n  return !!pattern.exec(allClass)\n}\n\nexport default hasClass\n","import removeClass from './utils/dom/removeClass'\nimport isEmpty from './utils/types/isEmpty'\nimport trim from './utils/lang/trim'\n\nconst _resetHeading = ($heading, hasAnchor = true, isAtStart = true) => {\n  const CLS_HEADING = 'outline-heading'\n  const text = $heading.innerHTML\n  const pattern = /^\\d+(\\.?\\d+)*\\s?/gi\n  let $anchor\n\n  $heading.innerHTML = text.replace(pattern, '')\n  $heading.removeAttribute('id')\n  $heading.removeAttribute('data-id')\n\n  removeClass($heading, CLS_HEADING)\n\n  if (!hasAnchor) {\n    return false\n  }\n\n  $anchor = $heading.querySelector(`.${CLS_HEADING}__anchor`)\n\n  if (isAtStart) {\n    removeClass($heading, `${CLS_HEADING}_start`)\n  }\n\n  if (isEmpty(trim($heading.className))) {\n    $heading.removeAttribute('class')\n  }\n\n  $heading.removeChild($anchor)\n}\n\nexport default _resetHeading\n","import isString from './isString'\n/**\n * 检测数据是否为空字符串\n * ========================================================================\n * @method isEmpty\n * @param {String} str\n * @returns {boolean}\n */\nconst isEmpty = (str) => {\n  return isString(str) && str === ''\n}\n\nexport default isEmpty\n","import trim from './utils/lang/trim'\nimport stripTags from './utils/lang/stripTags'\nimport isFunction from './utils/types/isFunction'\n\nimport _getChapterParentIdByDiffer from './_getChapterParentIdByDiffer'\nimport _getChaptersWithCode from './_getChaptersWithCode'\n\n/**\n * 根据文章中的 h1~h6 标签，自动分析返回文章章节数据\n * ========================================================================\n * @method getChapters\n * @param {Array} headings\n * @param {Boolean} [showCode]\n * @param {Function} [chapterTextFilter]\n * @return {*|*[]}\n */\nconst getChapters = (headings, showCode = true, chapterTextFilter = null) => {\n  let previous = 1\n  let level = 0\n  let text = ''\n  const chapters = []\n\n  headings.forEach((heading, i) => {\n    const tagName = heading.tagName\n    const headingLevel = tagName.replace(/h/i, '')\n    let current = parseInt(headingLevel, 10)\n    let pid = -1\n\n    // 场景1：当前标题是前一个标题的子标题\n    // 当前标题的（标题标签）序号 > 前一个标题的序号：两个相连的标题是父标题 -> 子标题关系；\n    // h2 （前一个标题）\n    // h3 （当前标题）\n    if (current > previous) {\n      level += 1\n\n      // 第一层级的 pid 是 -1\n      if (level === 1) {\n        pid = -1\n      } else {\n        pid = i - 1\n      }\n    }\n    // 场景2：当前标题和前一个标题层级相同\n    // 当前标题的（标题标签）序号 = 前一个标题的序号\n    // h2 （前一个标题）\n    // h2 （当前标题）\n    // 当前标题的（标题标签）序号 < 前一个标题的序号，并且当前标题序号 > 当前的级别\n    // h2\n    // h4 （前一个标题）\n    // h3 （当前标题：这种情况我们还是任务 h3 是 h2 的下一级章节）\n    else if (current === previous || (current < previous && current > level)) {\n      // H1 的层级肯定是 1\n      if (current === 1) {\n        level = 1\n        pid = -1\n      } else {\n        pid = chapters[i - 1].pid\n      }\n    }\n    // 场景3：当前标题比前一个标题层级高\n    else if (current <= level) {\n      // H1 的层级肯定是 1\n      if (current === 1) {\n        level = 1\n      } else {\n        level = level - (previous - current)\n\n        if (level <= 1) {\n          level = 1\n        }\n      }\n\n      // 第一级的标题\n      if (level === 1) {\n        pid = -1\n      } else {\n        // 通过当前标题和前一个标题之间的等级差，获得当前标题的父标题ID\n        pid = _getChapterParentIdByDiffer(chapters, previous - current, i)\n      }\n    }\n\n    previous = current\n\n    text = stripTags(trim(heading.innerHTML))\n\n    if (isFunction(chapterTextFilter)) {\n      text = chapterTextFilter(text)\n    }\n\n    chapters.push({\n      id: i,\n      pid: pid,\n      level: level,\n      rel: `heading-${i}`,\n      text,\n      tagName\n    })\n  })\n\n  return showCode ? _getChaptersWithCode(chapters) : chapters\n}\n\nexport default getChapters\n","import isString from '../types/isString'\n\n/**\n * 过滤所有 HTML 标签\n * ========================================================================\n * @method stripTags\n * @param {string} str\n * @returns {string}\n */\nconst stripTags = (str) => {\n  if (!isString(str)) {\n    return ''\n  }\n  return str.replace(/<\\/?[^>]+(>|$)/g, '')\n}\n\nexport default stripTags\n","const _getChapterParentIdByDiffer = (chapters, differ, index) => {\n  let previous = chapters[index - 1]\n  let pid\n  let i\n\n  for (i = 0; i < differ; i += 1) {\n    pid = previous.pid\n    previous = chapters[pid]\n  }\n\n  pid = previous.pid\n\n  return pid\n}\n\nexport default _getChapterParentIdByDiffer\n","import isArray from './utils/types/isArray'\n\nconst _getChaptersWithCode = (chapters) => {\n  const groups = {}\n  const cb = (o) => {\n    return [o.pid]\n  }\n\n  chapters.forEach((o) => {\n    const group = JSON.stringify(cb(o))\n\n    groups[group] = groups[group] || []\n    groups[group].push(o)\n\n    o.index = groups[group].length\n    if (o.pid === -1) {\n      o.code = String(o.index)\n    }\n  })\n\n  Object.keys(groups).forEach((group) => {\n    groups[group].forEach((c) => {\n      const subjects = groups[`[${c.id}]`]\n      if (!subjects || !isArray(subjects)) {\n        return false\n      }\n      subjects.forEach((o) => {\n        o.code = c.code + '.' + o.index\n      })\n    })\n  })\n\n  return chapters\n}\n\nexport default _getChaptersWithCode\n","import Base from './base'\n\n// 在文章的标题生成 anchor 链接\nimport isString from './utils/types/isString'\nimport isFunction from './utils/types/isFunction'\nimport isElement from './utils/types/isElement'\nimport toTree from './utils/lang/toTree'\nimport later from './utils/lang/later'\nimport scrollTo from './utils/dom/scrollTo'\nimport _getScrollElement from './utils/dom/_getScrollElement'\nimport offsetTop from './utils/dom/offsetTop'\nimport on from './utils/event/on'\nimport off from './utils/event/off'\nimport stop from './utils/event/stop'\nimport paint from './utils/icons/paint'\n\nimport _updateHeading from './_updateHeading'\nimport _resetHeading from './_resetHeading'\nimport getChapters from './getChapters'\n\nclass Anchors extends Base {\n  constructor(options) {\n    super()\n\n    this.attrs = Anchors.DEFAULTS\n    this.$articleElement = null\n    this.$scrollElement = null\n    this.$headings = []\n    this.chapters = []\n\n    if (options) {\n      this.initialize(options)\n    }\n  }\n\n  initialize(options) {\n    const showCode = this.attr('showCode') || true\n    let created\n    let scrollElement\n    let selector\n    let $articleElement\n    let articleElement\n\n    this.attr(options)\n    articleElement = this.attr('articleElement')\n    scrollElement = this.attr('scrollElement')\n    selector = this.attr('selector')\n    created = this.attr('created')\n\n    if (isString(articleElement)) {\n      $articleElement = document.querySelector(articleElement)\n    } else if (isElement(articleElement)) {\n      $articleElement = articleElement\n    }\n\n    if (!$articleElement) {\n      return this\n    }\n\n    this.$articleElement = $articleElement\n    this.$scrollElement = _getScrollElement(scrollElement)\n    this.$headings = [...$articleElement.querySelectorAll(selector)]\n\n    if (this.$headings.length < 1) {\n      return this\n    }\n\n    this.chapters = getChapters(\n      this.$headings,\n      showCode,\n      this.attr('chapterTextFilter')\n    )\n\n    if (isFunction(created)) {\n      created.call(this)\n    }\n\n    this.render().addListeners()\n\n    return this\n  }\n\n  getChapters(isTreeStructured = false) {\n    const chapters = this.chapters\n    return isTreeStructured ? toTree(chapters, 'id', 'pid') : chapters\n  }\n\n  count() {\n    return this.chapters.length\n  }\n\n  render() {\n    const mounted = this.attr('mounted')\n    const hasAnchor = this.attr('hasAnchor')\n    const isAtStart = this.attr('isAtStart')\n    const showCode = this.attr('showCode')\n    const anchorURL = this.attr('anchorURL')\n    const $headings = this.$headings\n    const chapters = this.getChapters()\n\n    paint()\n\n    $headings.forEach(($heading, i) => {\n      const chapterCode = chapters[i].code\n      _updateHeading($heading, i, {\n        hasAnchor,\n        isAtStart,\n        showCode,\n        chapterCode,\n        anchorURL\n      })\n    })\n\n    if (isFunction(mounted)) {\n      mounted.call(this)\n    }\n\n    return this\n  }\n\n  scrollTo(top, after) {\n    const el = this.$scrollElement\n\n    scrollTo(el, top, after)\n\n    return this\n  }\n\n  destroy() {\n    const hasAnchor = this.attr('hasAnchor')\n    const isAtStart = this.attr('isAtStart')\n    const beforeDestroy = this.attr('beforeDestroy')\n    const afterDestroy = this.attr('afterDestroy')\n    const $headings = this.$headings\n\n    if (isFunction(beforeDestroy)) {\n      beforeDestroy.call(this)\n    }\n\n    this.removeListeners()\n    $headings.forEach(($heading) => {\n      _resetHeading($heading, hasAnchor, isAtStart)\n    })\n\n    this.attr(Anchors.DEFAULTS)\n    this.$articleElement = null\n    this.$scrollElement = null\n    this.$headings = []\n    this.chapters = []\n\n    if (isFunction(afterDestroy)) {\n      afterDestroy.call(this)\n    }\n\n    return this\n  }\n\n  onAnchorTrigger(evt) {\n    const anchorURL = this.attr('anchorURL')\n    const afterScroll = this.attr('afterScroll')\n    const stickyHeight = this.attr('stickyHeight')\n    const $anchor = evt.delegateTarget\n    const $heading = $anchor.parentNode\n    const top = offsetTop($heading) - (stickyHeight + 10)\n    const $scrollElement = this.$scrollElement\n    const min = 0\n    const max = $scrollElement.scrollHeight - $scrollElement.clientHeight\n    const after = () => {\n      if (isFunction(afterScroll)) {\n        afterScroll.call(this, 'anchor')\n      }\n\n      later(() => {\n        this.$emit('toolbar:update', {\n          top,\n          min,\n          max\n        })\n      })\n    }\n\n    this.scrollTo(top, after)\n\n    if (!anchorURL) {\n      stop(evt)\n    }\n\n    return this\n  }\n\n  addListeners() {\n    const $articleElement = this.$articleElement\n\n    on(\n      $articleElement,\n      '.outline-heading__anchor',\n      'click',\n      this.onAnchorTrigger,\n      this,\n      true\n    )\n\n    return this\n  }\n\n  removeListeners() {\n    const $articleElement = this.$articleElement\n\n    off($articleElement, 'click', this.onAnchorTrigger)\n\n    return this\n  }\n}\n\nAnchors.DEFAULTS = {\n  scrollElement: 'html,body',\n  articleElement: '#article',\n  selector: 'h1,h2,h3,h4,h5,h6',\n  stickyHeight: 0,\n  anchorURL: '',\n  hasAnchor: true,\n  isAtStart: true,\n  showCode: false,\n  created: null,\n  mounted: null,\n  afterScroll: null,\n  beforeDestroy: null,\n  afterDestroy: null,\n  chapterTextFilter: null\n}\n\nexport default Anchors\n","const toTree = (list, nodeKey, parentKey) => {\r\n  const map = {}\r\n  const roots = []\r\n\r\n  list.forEach((item, i) => {\r\n    // initialize the map\r\n    map[item[nodeKey]] = i\r\n    // initialize the children\r\n    item.children = []\r\n  })\r\n\r\n  list.forEach((item) => {\r\n    const node = list[map[item[parentKey]]]\r\n\r\n    if (item[parentKey] !== -1) {\r\n      // if you have dangling branches check that map[node.parentId] exists\r\n      node.children.push(item)\r\n    } else {\r\n      roots.push(item)\r\n    }\r\n  })\r\n\r\n  return roots\r\n}\r\n\r\nexport default toTree\r\n","import easeInQuad from '../lang/easeInQuad'\nimport isFunction from '../types/isFunction'\nimport _getScrollElement from './_getScrollElement'\n\n/**\n * 指定 rootElement DOM 节点滚动到指定 top 位置\n * ========================================================================\n * @method scrollTo\n * @param {HTMLElement|Object} [scrollElement] - （必须）要滚动的 DOM 节点\n * @param {Number} top - （必须）滚动的 scrollTop 数值\n * @param {Function} [afterStop] - （可选）滚动完成的回调函数\n */\nconst scrollTo = (scrollElement, top, afterStop) => {\n  const $scrollElement = _getScrollElement(scrollElement)\n  let scrollTop = $scrollElement.scrollTop\n  let step = 0\n  const distance = top - scrollTop\n  const MAX_HEIGHT = $scrollElement.scrollHeight\n  const MAX_TOP = top - MAX_HEIGHT <= 0 ? top : MAX_HEIGHT\n  const stop = (top) => {\n    if (isFunction(afterStop)) {\n      afterStop(top)\n    }\n\n    return false\n  }\n  const play = () => {\n    step += 1\n\n    // 向上滚动\n    if (distance < 0) {\n      scrollTop -= easeInQuad(step)\n      $scrollElement.scrollTop = scrollTop\n\n      if (scrollTop <= top) {\n        $scrollElement.scrollTop = top\n        return stop(top)\n      }\n    } else {\n      scrollTop += easeInQuad(step)\n      $scrollElement.scrollTop = scrollTop\n\n      if (scrollTop >= MAX_TOP) {\n        $scrollElement.scrollTop = MAX_TOP\n        return stop(MAX_TOP)\n      }\n    }\n\n    requestAnimationFrame(play)\n  }\n\n  requestAnimationFrame(play)\n}\n\nexport default scrollTo\n","import isFunction from '../types/isFunction'\n\n/**\n * later - 延迟执行方法\n * ========================================================================\n * @method later\n * @param {Function} fn\n * @param {Number} [delay]\n * @returns {number|boolean}\n */\nconst later = (fn, delay = 300) => {\n  if (!isFunction(fn)) {\n    return false\n  }\n\n  return setTimeout(() => {\n    fn()\n  }, delay)\n}\n\nexport default later\n","/**\n * 停止事件（阻止默认行为和阻止事件的捕获或冒泡）\n * ========================================================================\n * @method stop\n * @param {Event} evt - 事件对象\n *\n * @example\n * <div id=\"nav\" class=\"nav\">\n *   <a id=\"service\" class=\"anchor\" href=\"https://www.yaohaixiao.com/serivce\">Service</a>\n *   <a id=\"help\" class=\"anchor\" href=\"https://www.yaohaixiao.com/help\">Help</a>\n * </div>\n *\n * const $nav = document.querySelector('#nav')\n * const $service = document.querySelector('.anchor')\n *\n * on($nav, 'click', function(evt) {\n *   console.log('你点击了导航栏')\n * })\n *\n * on($anchor, 'click', function(evt) {\n *   console.log('tagName', this.tagName)\n *\n *   // 工作台输出：'a'\n *   // 不会触发事件冒泡，输出：'你点击了导航栏'\n *   // 也不会切换到 href 属性的页面，阻止了点击链接的默认行为\n *   stopEvent(evt)\n * })\n */\nconst stop = function (evt) {\n  evt.stopPropagation()\n  evt.preventDefault()\n}\n\nexport default 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