chushihua

node_modules/element-ui/packages/cascader/index.js

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+import Cascader from './src/main';
+
+/* istanbul ignore next */
+Cascader.install = function(Vue) {
+  Vue.component(Cascader.name, Cascader);
+};
+
+export default Cascader;

node_modules/element-ui/packages/cascader/src/main.vue

@@ -0,0 +1,456 @@
+<template>
+  <span
+    class="el-cascader"
+    :class="[
+      {
+        'is-opened': menuVisible,
+        'is-disabled': cascaderDisabled
+      },
+      cascaderSize ? 'el-cascader--' + cascaderSize : ''
+    ]"
+    @click="handleClick"
+    @mouseenter="inputHover = true"
+    @focus="inputHover = true"
+    @mouseleave="inputHover = false"
+    @blur="inputHover = false"
+    ref="reference"
+    v-clickoutside="handleClickoutside"
+    @keydown="handleKeydown"
+  >
+    <el-input
+      ref="input"
+      :readonly="readonly"
+      :placeholder="currentLabels.length ? undefined : placeholder"
+      v-model="inputValue"
+      @input="debouncedInputChange"
+      @focus="handleFocus"
+      @blur="handleBlur"
+      @compositionstart.native="handleComposition"
+      @compositionend.native="handleComposition"
+      :validate-event="false"
+      :size="size"
+      :disabled="cascaderDisabled"
+      :class="{ 'is-focus': menuVisible }"
+    >
+      <template slot="suffix">
+        <i
+          key="1"
+          v-if="clearable && inputHover && currentLabels.length"
+          class="el-input__icon el-icon-circle-close el-cascader__clearIcon"
+          @click="clearValue"
+        ></i>
+        <i
+          key="2"
+          v-else
+          class="el-input__icon el-icon-arrow-down"
+          :class="{ 'is-reverse': menuVisible }"
+        ></i>
+      </template>
+    </el-input>
+    <span class="el-cascader__label" v-show="inputValue === '' && !isOnComposition">
+      <template v-if="showAllLevels">
+        <template v-for="(label, index) in currentLabels">
+          {{ label }}
+          <span v-if="index < currentLabels.length - 1" :key="index"> {{ separator }} </span>
+        </template>
+      </template>
+      <template v-else>
+        {{ currentLabels[currentLabels.length - 1] }}
+      </template>
+    </span>
+  </span>
+</template>
+
+<script>
+import Vue from 'vue';
+import ElCascaderMenu from './menu';
+import ElInput from 'element-ui/packages/input';
+import Popper from 'element-ui/src/utils/vue-popper';
+import Clickoutside from 'element-ui/src/utils/clickoutside';
+import emitter from 'element-ui/src/mixins/emitter';
+import Locale from 'element-ui/src/mixins/locale';
+import { t } from 'element-ui/src/locale';
+import debounce from 'throttle-debounce/debounce';
+import { generateId, escapeRegexpString, isIE, isEdge } from 'element-ui/src/utils/util';
+
+const popperMixin = {
+  props: {
+    placement: {
+      type: String,
+      default: 'bottom-start'
+    },
+    appendToBody: Popper.props.appendToBody,
+    arrowOffset: Popper.props.arrowOffset,
+    offset: Popper.props.offset,
+    boundariesPadding: Popper.props.boundariesPadding,
+    popperOptions: Popper.props.popperOptions
+  },
+  methods: Popper.methods,
+  data: Popper.data,
+  beforeDestroy: Popper.beforeDestroy
+};
+
+export default {
+  name: 'ElCascader',
+
+  directives: { Clickoutside },
+
+  mixins: [popperMixin, emitter, Locale],
+
+  inject: {
+    elForm: {
+      default: ''
+    },
+    elFormItem: {
+      default: ''
+    }
+  },
+
+  components: {
+    ElInput
+  },
+
+  props: {
+    options: {
+      type: Array,
+      required: true
+    },
+    props: {
+      type: Object,
+      default() {
+        return {
+          children: 'children',
+          label: 'label',
+          value: 'value',
+          disabled: 'disabled'
+        };
+      }
+    },
+    value: {
+      type: Array,
+      default() {
+        return [];
+      }
+    },
+    separator: {
+      type: String,
+      default: '/'
+    },
+    placeholder: {
+      type: String,
+      default() {
+        return t('el.cascader.placeholder');
+      }
+    },
+    disabled: Boolean,
+    clearable: {
+      type: Boolean,
+      default: false
+    },
+    changeOnSelect: Boolean,
+    popperClass: String,
+    expandTrigger: {
+      type: String,
+      default: 'click'
+    },
+    filterable: Boolean,
+    size: String,
+    showAllLevels: {
+      type: Boolean,
+      default: true
+    },
+    debounce: {
+      type: Number,
+      default: 300
+    },
+    beforeFilter: {
+      type: Function,
+      default: () => (() => {})
+    },
+    hoverThreshold: {
+      type: Number,
+      default: 500
+    }
+  },
+
+  data() {
+    return {
+      currentValue: this.value || [],
+      menu: null,
+      debouncedInputChange() {},
+      menuVisible: false,
+      inputHover: false,
+      inputValue: '',
+      flatOptions: null,
+      id: generateId(),
+      needFocus: true,
+      isOnComposition: false
+    };
+  },
+
+  computed: {
+    labelKey() {
+      return this.props.label || 'label';
+    },
+    valueKey() {
+      return this.props.value || 'value';
+    },
+    childrenKey() {
+      return this.props.children || 'children';
+    },
+    disabledKey() {
+      return this.props.disabled || 'disabled';
+    },
+    currentLabels() {
+      let options = this.options;
+      let labels = [];
+      this.currentValue.forEach(value => {
+        const targetOption = options && options.filter(option => option[this.valueKey] === value)[0];
+        if (targetOption) {
+          labels.push(targetOption[this.labelKey]);
+          options = targetOption[this.childrenKey];
+        }
+      });
+      return labels;
+    },
+    _elFormItemSize() {
+      return (this.elFormItem || {}).elFormItemSize;
+    },
+    cascaderSize() {
+      return this.size || this._elFormItemSize || (this.$ELEMENT || {}).size;
+    },
+    cascaderDisabled() {
+      return this.disabled || (this.elForm || {}).disabled;
+    },
+    readonly() {
+      return !this.filterable || (!isIE() && !isEdge() && !this.menuVisible);
+    }
+  },
+
+  watch: {
+    menuVisible(value) {
+      this.$refs.input.$refs.input.setAttribute('aria-expanded', value);
+      value ? this.showMenu() : this.hideMenu();
+      this.$emit('visible-change', value);
+    },
+    value(value) {
+      this.currentValue = value;
+    },
+    currentValue(value) {
+      this.dispatch('ElFormItem', 'el.form.change', [value]);
+    },
+    currentLabels(value) {
+      const inputLabel = this.showAllLevels ? value.join('/') : value[value.length - 1] ;
+      this.$refs.input.$refs.input.setAttribute('value', inputLabel);
+    },
+    options: {
+      deep: true,
+      handler(value) {
+        if (!this.menu) {
+          this.initMenu();
+        }
+        this.flatOptions = this.flattenOptions(this.options);
+        this.menu.options = value;
+      }
+    }
+  },
+
+  methods: {
+    initMenu() {
+      this.menu = new Vue(ElCascaderMenu).$mount();
+      this.menu.options = this.options;
+      this.menu.props = this.props;
+      this.menu.expandTrigger = this.expandTrigger;
+      this.menu.changeOnSelect = this.changeOnSelect;
+      this.menu.popperClass = this.popperClass;
+      this.menu.hoverThreshold = this.hoverThreshold;
+      this.popperElm = this.menu.$el;
+      this.menu.$refs.menus[0].setAttribute('id', `cascader-menu-${this.id}`);
+      this.menu.$on('pick', this.handlePick);
+      this.menu.$on('activeItemChange', this.handleActiveItemChange);
+      this.menu.$on('menuLeave', this.doDestroy);
+      this.menu.$on('closeInside', this.handleClickoutside);
+    },
+    showMenu() {
+      if (!this.menu) {
+        this.initMenu();
+      }
+
+      this.menu.value = this.currentValue.slice(0);
+      this.menu.visible = true;
+      this.menu.options = this.options;
+      this.$nextTick(_ => {
+        this.updatePopper();
+        this.menu.inputWidth = this.$refs.input.$el.offsetWidth - 2;
+      });
+    },
+    hideMenu() {
+      this.inputValue = '';
+      this.menu.visible = false;
+      if (this.needFocus) {
+        this.$refs.input.focus();
+      } else {
+        this.needFocus = true;
+      }
+    },
+    handleActiveItemChange(value) {
+      this.$nextTick(_ => {
+        this.updatePopper();
+      });
+      this.$emit('active-item-change', value);
+    },
+    handleKeydown(e) {
+      const keyCode = e.keyCode;
+      if (keyCode === 13) {
+        this.handleClick();
+      } else if (keyCode === 40) { // down
+        this.menuVisible = true; // 打开
+        setTimeout(() => {
+          const firstMenu = this.popperElm.querySelectorAll('.el-cascader-menu')[0];
+          firstMenu.querySelectorAll("[tabindex='-1']")[0].focus();
+        });
+        e.stopPropagation();
+        e.preventDefault();
+      } else if (keyCode === 27 || keyCode === 9) { // esc  tab
+        this.inputValue = '';
+        if (this.menu) this.menu.visible = false;
+      }
+    },
+    handlePick(value, close = true) {
+      this.currentValue = value;
+      this.$emit('input', value);
+      this.$emit('change', value);
+
+      if (close) {
+        this.menuVisible = false;
+      } else {
+        this.$nextTick(this.updatePopper);
+      }
+    },
+    handleInputChange(value) {
+      if (!this.menuVisible) return;
+      const flatOptions = this.flatOptions;
+
+      if (!value) {
+        this.menu.options = this.options;
+        this.$nextTick(this.updatePopper);
+        return;
+      }
+
+      let filteredFlatOptions = flatOptions.filter(optionsStack => {
+        return optionsStack.some(option => new RegExp(escapeRegexpString(value), 'i')
+          .test(option[this.labelKey]));
+      });
+
+      if (filteredFlatOptions.length > 0) {
+        filteredFlatOptions = filteredFlatOptions.map(optionStack => {
+          return {
+            __IS__FLAT__OPTIONS: true,
+            value: optionStack.map(item => item[this.valueKey]),
+            label: this.renderFilteredOptionLabel(value, optionStack),
+            disabled: optionStack.some(item => item[this.disabledKey])
+          };
+        });
+      } else {
+        filteredFlatOptions = [{
+          __IS__FLAT__OPTIONS: true,
+          label: this.t('el.cascader.noMatch'),
+          value: '',
+          disabled: true
+        }];
+      }
+      this.menu.options = filteredFlatOptions;
+      this.$nextTick(this.updatePopper);
+    },
+    renderFilteredOptionLabel(inputValue, optionsStack) {
+      return optionsStack.map((option, index) => {
+        const label = option[this.labelKey];
+        const keywordIndex = label.toLowerCase().indexOf(inputValue.toLowerCase());
+        const labelPart = label.slice(keywordIndex, inputValue.length + keywordIndex);
+        const node = keywordIndex > -1 ? this.highlightKeyword(label, labelPart) : label;
+        return index === 0 ? node : [` ${this.separator} `, node];
+      });
+    },
+    highlightKeyword(label, keyword) {
+      const h = this._c;
+      return label.split(keyword)
+        .map((node, index) => index === 0 ? node : [
+          h('span', { class: { 'el-cascader-menu__item__keyword': true }}, [this._v(keyword)]),
+          node
+        ]);
+    },
+    flattenOptions(options, ancestor = []) {
+      let flatOptions = [];
+      options.forEach((option) => {
+        const optionsStack = ancestor.concat(option);
+        if (!option[this.childrenKey]) {
+          flatOptions.push(optionsStack);
+        } else {
+          if (this.changeOnSelect) {
+            flatOptions.push(optionsStack);
+          }
+          flatOptions = flatOptions.concat(this.flattenOptions(option[this.childrenKey], optionsStack));
+        }
+      });
+      return flatOptions;
+    },
+    clearValue(ev) {
+      ev.stopPropagation();
+      this.handlePick([], true);
+    },
+    handleClickoutside(pickFinished = false) {
+      if (this.menuVisible && !pickFinished) {
+        this.needFocus = false;
+      }
+      this.menuVisible = false;
+    },
+    handleClick() {
+      if (this.cascaderDisabled) return;
+      this.$refs.input.focus();
+      if (this.filterable) {
+        this.menuVisible = true;
+        return;
+      }
+      this.menuVisible = !this.menuVisible;
+    },
+    handleFocus(event) {
+      this.$emit('focus', event);
+    },
+    handleBlur(event) {
+      this.$emit('blur', event);
+    },
+    handleComposition(event) {
+      this.isOnComposition = event.type !== 'compositionend';
+    }
+  },
+
+  created() {
+    this.debouncedInputChange = debounce(this.debounce, value => {
+      const before = this.beforeFilter(value);
+
+      if (before && before.then) {
+        this.menu.options = [{
+          __IS__FLAT__OPTIONS: true,
+          label: this.t('el.cascader.loading'),
+          value: '',
+          disabled: true
+        }];
+        before
+          .then(() => {
+            this.$nextTick(() => {
+              this.handleInputChange(value);
+            });
+          });
+      } else if (before !== false) {
+        this.$nextTick(() => {
+          this.handleInputChange(value);
+        });
+      }
+    });
+  },
+
+  mounted() {
+    this.flatOptions = this.flattenOptions(this.options);
+  }
+};
+</script>

node_modules/element-ui/packages/cascader/src/menu.vue

@@ -0,0 +1,375 @@
+<script>
+  import { isDef } from 'element-ui/src/utils/shared';
+  import scrollIntoView from 'element-ui/src/utils/scroll-into-view';
+  import { generateId } from 'element-ui/src/utils/util';
+
+  const copyArray = (arr, props) => {
+    if (!arr || !Array.isArray(arr) || !props) return arr;
+    const result = [];
+    const configurableProps = ['__IS__FLAT__OPTIONS', 'label', 'value', 'disabled'];
+    const childrenProp = props.children || 'children';
+    arr.forEach(item => {
+      const itemCopy = {};
+      configurableProps.forEach(prop => {
+        let name = props[prop];
+        let value = item[name];
+        if (value === undefined) {
+          name = prop;
+          value = item[name];
+        }
+        if (value !== undefined) itemCopy[name] = value;
+      });
+      if (Array.isArray(item[childrenProp])) {
+        itemCopy[childrenProp] = copyArray(item[childrenProp], props);
+      }
+      result.push(itemCopy);
+    });
+    return result;
+  };
+
+  export default {
+    name: 'ElCascaderMenu',
+
+    data() {
+      return {
+        inputWidth: 0,
+        options: [],
+        props: {},
+        visible: false,
+        activeValue: [],
+        value: [],
+        expandTrigger: 'click',
+        changeOnSelect: false,
+        popperClass: '',
+        hoverTimer: 0,
+        clicking: false,
+        id: generateId()
+      };
+    },
+
+    watch: {
+      visible(value) {
+        if (value) {
+          this.activeValue = this.value;
+        }
+      },
+      value: {
+        immediate: true,
+        handler(value) {
+          this.activeValue = value;
+        }
+      }
+    },
+
+    computed: {
+      activeOptions: {
+        get() {
+          const activeValue = this.activeValue;
+          const configurableProps = ['label', 'value', 'children', 'disabled'];
+
+          const formatOptions = options => {
+            options.forEach(option => {
+              if (option.__IS__FLAT__OPTIONS) return;
+              configurableProps.forEach(prop => {
+                const value = option[this.props[prop] || prop];
+                if (value !== undefined) option[prop] = value;
+              });
+              if (Array.isArray(option.children)) {
+                formatOptions(option.children);
+              }
+            });
+          };
+
+          const loadActiveOptions = (options, activeOptions = []) => {
+            const level = activeOptions.length;
+            activeOptions[level] = options;
+            let active = activeValue[level];
+            if (isDef(active)) {
+              options = options.filter(option => option.value === active)[0];
+              if (options && options.children) {
+                loadActiveOptions(options.children, activeOptions);
+              }
+            }
+            return activeOptions;
+          };
+
+          const optionsCopy = copyArray(this.options, this.props);
+          formatOptions(optionsCopy);
+          return loadActiveOptions(optionsCopy);
+        }
+      }
+    },
+
+    methods: {
+      select(item, menuIndex) {
+        if (item.__IS__FLAT__OPTIONS) {
+          this.activeValue = item.value;
+        } else if (menuIndex) {
+          this.activeValue.splice(menuIndex, this.activeValue.length - 1, item.value);
+        } else {
+          this.activeValue = [item.value];
+        }
+        this.$emit('pick', this.activeValue.slice());
+      },
+      handleMenuLeave() {
+        this.$emit('menuLeave');
+      },
+      activeItem(item, menuIndex) {
+        const len = this.activeOptions.length;
+        this.activeValue.splice(menuIndex, len, item.value);
+        this.activeOptions.splice(menuIndex + 1, len, item.children);
+        if (this.changeOnSelect) {
+          this.$emit('pick', this.activeValue.slice(), false);
+        } else {
+          this.$emit('activeItemChange', this.activeValue);
+        }
+      },
+      scrollMenu(menu) {
+        scrollIntoView(menu, menu.getElementsByClassName('is-active')[0]);
+      },
+      handleMenuEnter() {
+        this.$nextTick(() => this.$refs.menus.forEach(menu => this.scrollMenu(menu)));
+      }
+    },
+
+    render(h) {
+      const {
+        activeValue,
+        activeOptions,
+        visible,
+        expandTrigger,
+        popperClass,
+        hoverThreshold
+      } = this;
+      let itemId = null;
+      let itemIndex = 0;
+
+      let hoverMenuRefs = {};
+      const hoverMenuHandler = e => {
+        const activeMenu = hoverMenuRefs.activeMenu;
+        if (!activeMenu) return;
+        const offsetX = e.offsetX;
+        const width = activeMenu.offsetWidth;
+        const height = activeMenu.offsetHeight;
+
+        if (e.target === hoverMenuRefs.activeItem) {
+          clearTimeout(this.hoverTimer);
+          const {activeItem} = hoverMenuRefs;
+          const offsetY_top = activeItem.offsetTop;
+          const offsetY_Bottom = offsetY_top + activeItem.offsetHeight;
+
+          hoverMenuRefs.hoverZone.innerHTML = `
+            <path style="pointer-events: auto;" fill="transparent" d="M${offsetX} ${offsetY_top} L${width} 0 V${offsetY_top} Z" />
+            <path style="pointer-events: auto;" fill="transparent" d="M${offsetX} ${offsetY_Bottom} L${width} ${height} V${offsetY_Bottom} Z" />
+          `;
+        } else {
+          if (!this.hoverTimer) {
+            this.hoverTimer = setTimeout(() => {
+              hoverMenuRefs.hoverZone.innerHTML = '';
+            }, hoverThreshold);
+          }
+        }
+      };
+
+      const menus = this._l(activeOptions, (menu, menuIndex) => {
+        let isFlat = false;
+        const menuId = `menu-${this.id}-${ menuIndex}`;
+        const ownsId = `menu-${this.id}-${ menuIndex + 1 }`;
+        const items = this._l(menu, item => {
+          const events = {
+            on: {}
+          };
+
+          if (item.__IS__FLAT__OPTIONS) isFlat = true;
+
+          if (!item.disabled) {
+            // keydown up/down/left/right/enter
+            events.on.keydown = (ev) => {
+              const keyCode = ev.keyCode;
+              if ([37, 38, 39, 40, 13, 9, 27].indexOf(keyCode) < 0) {
+                return;
+              }
+              const currentEle = ev.target;
+              const parentEle = this.$refs.menus[menuIndex];
+              const menuItemList = parentEle.querySelectorAll("[tabindex='-1']");
+              const currentIndex = Array.prototype.indexOf.call(menuItemList, currentEle); // 当前索引
+              let nextIndex, nextMenu;
+              if ([38, 40].indexOf(keyCode) > -1) {
+                if (keyCode === 38) { // up键
+                  nextIndex = currentIndex !== 0 ? (currentIndex - 1) : currentIndex;
+                } else if (keyCode === 40) { // down
+                  nextIndex = currentIndex !== (menuItemList.length - 1) ? currentIndex + 1 : currentIndex;
+                }
+                menuItemList[nextIndex].focus();
+              } else if (keyCode === 37) { // left键
+                if (menuIndex !== 0) {
+                  const previousMenu = this.$refs.menus[menuIndex - 1];
+                  previousMenu.querySelector('[aria-expanded=true]').focus();
+                }
+              } else if (keyCode === 39) { // right
+                if (item.children) {
+                  // 有子menu 选择子menu的第一个menuitem
+                  nextMenu = this.$refs.menus[menuIndex + 1];
+                  nextMenu.querySelectorAll("[tabindex='-1']")[0].focus();
+                }
+              } else if (keyCode === 13) {
+                if (!item.children) {
+                  const id = currentEle.getAttribute('id');
+                  parentEle.setAttribute('aria-activedescendant', id);
+                  this.select(item, menuIndex);
+                  this.$nextTick(() => this.scrollMenu(this.$refs.menus[menuIndex]));
+                }
+              } else if (keyCode === 9 || keyCode === 27) { // esc tab
+                this.$emit('closeInside');
+              }
+            };
+            if (item.children) {
+              let triggerEvent = {
+                click: 'click',
+                hover: 'mouseenter'
+              }[expandTrigger];
+              const triggerHandler = () => {
+                if (this.visible) {
+                  this.activeItem(item, menuIndex);
+                  this.$nextTick(() => {
+                    // adjust self and next level
+                    this.scrollMenu(this.$refs.menus[menuIndex]);
+                    this.scrollMenu(this.$refs.menus[menuIndex + 1]);
+                  });
+                }
+              };
+              events.on[triggerEvent] = triggerHandler;
+              if (triggerEvent === 'mouseenter' && this.changeOnSelect) {
+                events.on.click = () => {
+                  if (this.activeValue.indexOf(item.value) !== -1) {
+                    this.$emit('closeInside', true);
+                  }
+                };
+              }
+              events.on['mousedown'] = () => {
+                this.clicking = true;
+              };
+              events.on['focus'] = () => { // focus 选中
+                if (this.clicking) {
+                  this.clicking = false;
+                  return;
+                }
+                triggerHandler();
+              };
+            } else {
+              events.on.click = () => {
+                this.select(item, menuIndex);
+                this.$nextTick(() => this.scrollMenu(this.$refs.menus[menuIndex]));
+              };
+            }
+          }
+          if (!item.disabled && !item.children) { // no children set id
+            itemId = `${menuId}-${itemIndex}`;
+            itemIndex++;
+          }
+          return (
+            <li
+              class={{
+                'el-cascader-menu__item': true,
+                'el-cascader-menu__item--extensible': item.children,
+                'is-active': item.value === activeValue[menuIndex],
+                'is-disabled': item.disabled
+              }}
+              ref={item.value === activeValue[menuIndex] ? 'activeItem' : null}
+              {...events}
+              tabindex= { item.disabled ? null : -1 }
+              role="menuitem"
+              aria-haspopup={ !!item.children }
+              aria-expanded={ item.value === activeValue[menuIndex] }
+              id = { itemId }
+              aria-owns = { !item.children ? null : ownsId }
+            >
+              <span>{item.label}</span>
+            </li>
+          );
+        });
+        let menuStyle = {};
+        if (isFlat) {
+          menuStyle.minWidth = this.inputWidth + 'px';
+        }
+
+        const isHoveredMenu = expandTrigger === 'hover' && activeValue.length - 1 === menuIndex;
+        const hoverMenuEvent = {
+          on: {
+          }
+        };
+
+        if (isHoveredMenu) {
+          hoverMenuEvent.on.mousemove = hoverMenuHandler;
+          menuStyle.position = 'relative';
+        }
+
+        return (
+          <ul
+            class={{
+              'el-cascader-menu': true,
+              'el-cascader-menu--flexible': isFlat
+            }}
+            {...hoverMenuEvent}
+            style={menuStyle}
+            refInFor
+            ref="menus"
+            role="menu"
+            id = { menuId }
+          >
+            {items}
+            {
+              isHoveredMenu
+                ? (<svg
+                  ref="hoverZone"
+                  style={{
+                    position: 'absolute',
+                    top: 0,
+                    height: '100%',
+                    width: '100%',
+                    left: 0,
+                    pointerEvents: 'none'
+                  }}
+                ></svg>) : null
+            }
+          </ul>
+        );
+      });
+
+      if (expandTrigger === 'hover') {
+        this.$nextTick(() => {
+          const activeItem = this.$refs.activeItem;
+
+          if (activeItem) {
+            const activeMenu = activeItem.parentElement;
+            const hoverZone = this.$refs.hoverZone;
+
+            hoverMenuRefs = {
+              activeMenu,
+              activeItem,
+              hoverZone
+            };
+          } else {
+            hoverMenuRefs = {};
+          }
+        });
+      }
+
+      return (
+        <transition name="el-zoom-in-top" on-before-enter={this.handleMenuEnter} on-after-leave={this.handleMenuLeave}>
+          <div
+            v-show={visible}
+            class={[
+              'el-cascader-menus el-popper',
+              popperClass
+            ]}
+            ref="wrapper"
+          >
+            <div x-arrow class="popper__arrow"></div>
+            {menus}
+          </div>
+        </transition>
+      );
+    }
+  };
+</script>