//配置项
var config = {

  /**

   * Option merge strategies (used in core/util/options)//选项合并策略

   */

  optionMergeStrategies: Object.create(null),

  /**

   * Whether to suppress warnings.//是否抑制警告

   */

  silent: false,

  /**

   * Show production mode//生产模式 tip message on boot?//提示信息引导

   */

  productionTip: "development" !== 'production',

  /**

   * Whether to enable devtools//是否启用开发者工具

   */

  devtools: "development" !== 'production',

  /**

   * Whether to record perf//是否记录性能

   */

  performance: "development" !== 'production',

  /**

   * Error handler for watcher errors//错误处理观察错误

   */

  errorHandler: null,

  /**

   * Ignore certain custom elements//忽略某些自定义元素

   */

  ignoredElements: [],

  /**

   * Custom user key aliases for v-on//自定义用户键别名

   */

  keyCodes: Object.create(null),

  /**

   * Check if a tag is reserved so that it cannot be registered as a//检查如果一个标签被保留所以它将不会被注册为一个组件

   * component. This is platform-dependent and may be overwritten.//这是与平台相关的可能被覆盖

   */

  isReservedTag: no,

  /**

   * Check if a tag is an unknown element.检查一个标签是否是未知的元素

   * Platform-dependent.//平台相关

   */

  isUnknownElement: no,

  /**

   * Get the namespace of an element//得到一个元素的命名空间

   */

  getTagNamespace: noop,

  /**

   * Parse the real tag name for the specific platform.//针对特殊的平台解析真正的标签名称

   */

  parsePlatformTagName: identity,

  /**

   * Check if an attribute must be bound using property, e.g. value//检查是否一个属性必须被限制用一个属性

   * Platform-dependent.

   */

  mustUseProp: no,

  /**

   * List of asset types that a component can own.//组件能拥有的资产类型列表

   */

  _assetTypes: [

    'component',

    'directive',

    'filter'

  ],

  /**

   * List of lifecycle hooks.//钩子的生命周期

   */

  _lifecycleHooks: [

    'beforeCreate',

    'created',

    'beforeMount',

    'mounted',

    'beforeUpdate',

    'updated',

    'beforeDestroy',

    'destroyed',

    'activated',

    'deactivated'

  ],

  /**

   * Max circular updates allowed in a scheduler flush cycle.最大循环更新允许在一个调度冲洗循环

   */

  _maxUpdateCount: 100

};