vant

utils/dist/dropdown-menu/index.d.ts

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+export {};

utils/dist/dropdown-menu/index.js

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+import { VantComponent } from '../common/component';
+import { addUnit } from '../common/utils';
+let ARRAY = [];
+VantComponent({
+    field: true,
+    relation: {
+        name: 'dropdown-item',
+        type: 'descendant',
+        linked(target) {
+            this.children.push(target);
+            this.updateItemListData();
+        },
+        unlinked(target) {
+            this.children = this.children.filter((child) => child !== target);
+            this.updateItemListData();
+        }
+    },
+    props: {
+        activeColor: {
+            type: String,
+            observer: 'updateChildrenData'
+        },
+        overlay: {
+            type: Boolean,
+            value: true,
+            observer: 'updateChildrenData'
+        },
+        zIndex: {
+            type: Number,
+            value: 10
+        },
+        duration: {
+            type: Number,
+            value: 200,
+            observer: 'updateChildrenData'
+        },
+        direction: {
+            type: String,
+            value: 'down',
+            observer: 'updateChildrenData'
+        },
+        closeOnClickOverlay: {
+            type: Boolean,
+            value: true,
+            observer: 'updateChildrenData'
+        },
+        closeOnClickOutside: {
+            type: Boolean,
+            value: true
+        }
+    },
+    data: {
+        itemListData: []
+    },
+    beforeCreate() {
+        const { windowHeight } = wx.getSystemInfoSync();
+        this.windowHeight = windowHeight;
+        this.children = [];
+        ARRAY.push(this);
+    },
+    destroyed() {
+        ARRAY = ARRAY.filter(item => item !== this);
+    },
+    methods: {
+        updateItemListData() {
+            this.setData({
+                itemListData: this.children.map((child) => child.data)
+            });
+        },
+        updateChildrenData() {
+            this.children.forEach((child) => {
+                child.updateDataFromParent();
+            });
+        },
+        toggleItem(active) {
+            this.children.forEach((item, index) => {
+                const { showPopup } = item.data;
+                if (index === active) {
+                    item.toggle();
+                }
+                else if (showPopup) {
+                    item.toggle(false, { immediate: true });
+                }
+            });
+        },
+        close() {
+            this.children.forEach((child) => {
+                child.toggle(false, { immediate: true });
+            });
+        },
+        getChildWrapperStyle() {
+            const { zIndex, direction } = this.data;
+            return this.getRect('.van-dropdown-menu').then((rect) => {
+                const { top = 0, bottom = 0 } = rect;
+                const offset = direction === 'down' ? bottom : this.windowHeight - top;
+                let wrapperStyle = `z-index: ${zIndex};`;
+                if (direction === 'down') {
+                    wrapperStyle += `top: ${addUnit(offset)};`;
+                }
+                else {
+                    wrapperStyle += `bottom: ${addUnit(offset)};`;
+                }
+                return wrapperStyle;
+            });
+        },
+        onTitleTap(event) {
+            const { index } = event.currentTarget.dataset;
+            const child = this.children[index];
+            if (!child.data.disabled) {
+                ARRAY.forEach(menuItem => {
+                    if (menuItem &&
+                        menuItem.data.closeOnClickOutside &&
+                        menuItem !== this) {
+                        menuItem.close();
+                    }
+                });
+                this.toggleItem(index);
+            }
+        }
+    }
+});

utils/dist/dropdown-menu/index.json

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+{
+  "component": true
+}

utils/dist/dropdown-menu/index.wxml

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+<wxs src="../wxs/utils.wxs" module="utils" />
+<wxs src="./index.wxs" module="computed" />
+
+<view class="van-dropdown-menu van-dropdown-menu--top-bottom">
+  <view
+    wx:for="{{ itemListData }}"
+    wx:key="index"
+    data-index="{{ index }}"
+    class="{{ utils.bem('dropdown-menu__item', { disabled: item.disabled }) }}"
+    bind:tap="onTitleTap"
+  >
+    <view
+      class="{{ item.titleClass }} {{ utils.bem('dropdown-menu__title', { active: item.showPopup, down: item.showPopup === (direction === 'down') }) }}"
+      style="{{ item.showPopup ? 'color:' + activeColor : '' }}"
+    >
+      <view class="van-ellipsis">
+        {{ computed.displayTitle(item) }}
+      </view>
+    </view>
+  </view>
+
+  <slot />
+</view>

utils/dist/dropdown-menu/index.wxs

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+/* eslint-disable */
+function displayTitle(item) {
+  if (item.title) {
+    return item.title;
+  }
+
+  var match = item.options.filter(function(option) {
+    return option.value === item.value;
+  });
+  var displayTitle = match.length ? match[0].text : '';
+  return displayTitle;
+}
+
+module.exports = {
+  displayTitle: displayTitle
+};

utils/dist/dropdown-menu/index.wxss

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+@import '../common/index.wxss';.van-dropdown-menu{display:-webkit-flex;display:flex;-webkit-user-select:none;user-select:none;height:50px;height:var(--dropdown-menu-height,50px);background-color:#fff;background-color:var(--dropdown-menu-background-color,#fff)}.van-dropdown-menu__item{display:-webkit-flex;display:flex;-webkit-flex:1;flex:1;-webkit-align-items:center;align-items:center;-webkit-justify-content:center;justify-content:center;min-width:0}.van-dropdown-menu__item:active{opacity:.7}.van-dropdown-menu__item--disabled:active{opacity:1}.van-dropdown-menu__item--disabled .van-dropdown-menu__title{color:#969799;color:var(--dropdown-menu-title-disabled-text-color,#969799)}.van-dropdown-menu__title{position:relative;box-sizing:border-box;max-width:100%;padding:0 8px;padding:var(--dropdown-menu-title-padding,0 8px);color:#323233;color:var(--dropdown-menu-title-text-color,#323233);font-size:15px;font-size:var(--dropdown-menu-title-font-size,15px);line-height:18px;line-height:var(--dropdown-menu-title-line-height,18px)}.van-dropdown-menu__title:after{position:absolute;top:50%;right:-4px;margin-top:-5px;border-color:transparent transparent currentcolor currentcolor;border-style:solid;border-width:3px;-webkit-transform:rotate(-45deg);transform:rotate(-45deg);opacity:.8;content:""}.van-dropdown-menu__title--active{color:#1989fa;color:var(--dropdown-menu-title-active-text-color,#1989fa)}.van-dropdown-menu__title--down:after{margin-top:-1px;-webkit-transform:rotate(135deg);transform:rotate(135deg)}