{"ast":null,"code":"import { sortChildren } from '../utils/vnodes';\nexport function ChildrenMixin(_parent, options) {\n  var _inject, _computed;\n  if (options === void 0) {\n    options = {};\n  }\n  var indexKey = options.indexKey || 'index';\n  return {\n    inject: (_inject = {}, _inject[_parent] = {\n      default: null\n    }, _inject),\n    computed: (_computed = {\n      parent: function parent() {\n        if (this.disableBindRelation) {\n          return null;\n        }\n        return this[_parent];\n      }\n    }, _computed[indexKey] = function () {\n      this.bindRelation();\n      if (this.parent) {\n        return this.parent.children.indexOf(this);\n      }\n      return null;\n    }, _computed),\n    watch: {\n      disableBindRelation: function disableBindRelation(val) {\n        if (!val) {\n          this.bindRelation();\n        }\n      }\n    },\n    mounted: function mounted() {\n      this.bindRelation();\n    },\n    beforeDestroy: function beforeDestroy() {\n      var _this = this;\n      if (this.parent) {\n        this.parent.children = this.parent.children.filter(function (item) {\n          return item !== _this;\n        });\n      }\n    },\n    methods: {\n      bindRelation: function bindRelation() {\n        if (!this.parent || this.parent.children.indexOf(this) !== -1) {\n          return;\n        }\n        var children = [].concat(this.parent.children, [this]);\n        sortChildren(children, this.parent);\n        this.parent.children = children;\n      }\n    }\n  };\n}\nexport function ParentMixin(parent) {\n  return {\n    provide: function provide() {\n      var _ref;\n      return _ref = {}, _ref[parent] = this, _ref;\n    },\n    data: function data() {\n      return {\n        children: []\n      };\n    }\n  };\n}","map":{"version":3,"names":["sortChildren","ChildrenMixin","_parent","options","_inject","_computed","indexKey","inject","default","computed","parent","disableBindRelation","bindRelation","children","indexOf","watch","val","mounted","beforeDestroy","_this","filter","item","methods","concat","ParentMixin","provide","_ref","data"],"sources":["E:/work/sino/sino-h5/node_modules/vant/es/mixins/relation.js"],"sourcesContent":["import { sortChildren } from '../utils/vnodes';\nexport function ChildrenMixin(_parent, options) {\n  var _inject, _computed;\n\n  if (options === void 0) {\n    options = {};\n  }\n\n  var indexKey = options.indexKey || 'index';\n  return {\n    inject: (_inject = {}, _inject[_parent] = {\n      default: null\n    }, _inject),\n    computed: (_computed = {\n      parent: function parent() {\n        if (this.disableBindRelation) {\n          return null;\n        }\n\n        return this[_parent];\n      }\n    }, _computed[indexKey] = function () {\n      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