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 | | <template> |  |   <transition name="el-zoom-in-top" @after-leave="doDestroy"> |  |     <ul class="el-dropdown-menu el-popper" :class="[size && `el-dropdown-menu--${size}`]" v-show="showPopper"> |  |       <slot></slot> |  |     </ul> |  |   </transition> |  | </template> |  | <script> |  |   import Popper from 'element-ui/src/utils/vue-popper'; |  |   |  |   export default { |  |     name: 'ElDropdownMenu', |  |   |  |     componentName: 'ElDropdownMenu', |  |   |  |     mixins: [Popper], |  |   |  |     props: { |  |       visibleArrow: { |  |         type: Boolean, |  |         default: true |  |       }, |  |       arrowOffset: { |  |         type: Number, |  |         default: 0 |  |       } |  |     }, |  |   |  |     data() { |  |       return { |  |         size: this.dropdown.dropdownSize |  |       }; |  |     }, |  |   |  |     inject: ['dropdown'], |  |   |  |     created() { |  |       this.$on('updatePopper', () => { |  |         if (this.showPopper) this.updatePopper(); |  |       }); |  |       this.$on('visible', val => { |  |         this.showPopper = val; |  |       }); |  |     }, |  |   |  |     mounted() { |  |       this.dropdown.popperElm = this.popperElm = this.$el; |  |       this.referenceElm = this.dropdown.$el; |  |       // compatible with 2.6 new v-slot syntax |  |       // issue link https://github.com/ElemeFE/element/issues/14345 |  |       this.dropdown.initDomOperation(); |  |     }, |  |   |  |     watch: { |  |       'dropdown.placement': { |  |         immediate: true, |  |         handler(val) { |  |           this.currentPlacement = val; |  |         } |  |       } |  |     } |  |   }; |  | </script> | 
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