vant

utils/dist/collapse-item/index.d.ts

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+export {};

utils/dist/collapse-item/index.js

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+import { VantComponent } from '../common/component';
+const nextTick = () => new Promise(resolve => setTimeout(resolve, 20));
+VantComponent({
+    classes: ['title-class', 'content-class'],
+    relation: {
+        name: 'collapse',
+        type: 'ancestor',
+        linked(parent) {
+            this.parent = parent;
+        }
+    },
+    props: {
+        name: null,
+        title: null,
+        value: null,
+        icon: String,
+        label: String,
+        disabled: Boolean,
+        clickable: Boolean,
+        border: {
+            type: Boolean,
+            value: true
+        },
+        isLink: {
+            type: Boolean,
+            value: true
+        }
+    },
+    data: {
+        contentHeight: 0,
+        expanded: false,
+        transition: false
+    },
+    mounted() {
+        this.updateExpanded()
+            .then(nextTick)
+            .then(() => {
+            const data = { transition: true };
+            if (this.data.expanded) {
+                data.contentHeight = 'auto';
+            }
+            this.setData(data);
+        });
+    },
+    methods: {
+        updateExpanded() {
+            if (!this.parent) {
+                return Promise.resolve();
+            }
+            const { value, accordion } = this.parent.data;
+            const { children = [] } = this.parent;
+            const { name } = this.data;
+            const index = children.indexOf(this);
+            const currentName = name == null ? index : name;
+            const expanded = accordion
+                ? value === currentName
+                : (value || []).some((name) => name === currentName);
+            const stack = [];
+            if (expanded !== this.data.expanded) {
+                stack.push(this.updateStyle(expanded));
+            }
+            stack.push(this.set({ index, expanded }));
+            return Promise.all(stack);
+        },
+        updateStyle(expanded) {
+            return this.getRect('.van-collapse-item__content')
+                .then((rect) => rect.height)
+                .then((height) => {
+                if (expanded) {
+                    return this.set({
+                        contentHeight: height ? `${height}px` : 'auto'
+                    });
+                }
+                return this.set({ contentHeight: `${height}px` })
+                    .then(nextTick)
+                    .then(() => this.set({ contentHeight: 0 }));
+            });
+        },
+        onClick() {
+            if (this.data.disabled) {
+                return;
+            }
+            const { name, expanded } = this.data;
+            const index = this.parent.children.indexOf(this);
+            const currentName = name == null ? index : name;
+            this.parent.switch(currentName, !expanded);
+        },
+        onTransitionEnd() {
+            if (this.data.expanded) {
+                this.setData({
+                    contentHeight: 'auto'
+                });
+            }
+        }
+    }
+});

utils/dist/collapse-item/index.json

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+{
+  "component": true,
+  "usingComponents": {
+    "van-cell": "../cell/index"
+  }
+}

utils/dist/collapse-item/index.wxml

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+<wxs src="../wxs/utils.wxs" module="utils" />
+
+<view class="van-collapse-item custom-class {{ index !== 0 ? 'van-hairline--top' : '' }}">
+  <van-cell
+    title="{{ title }}"
+    title-class="title-class"
+    icon="{{ icon }}"
+    value="{{ value }}"
+    label="{{ label }}"
+    is-link="{{ isLink }}"
+    clickable="{{ clickable }}"
+    border="{{ border && expanded }}"
+    class="{{ utils.bem('collapse-item__title', { disabled, expanded }) }}"
+    right-icon-class="van-cell__right-icon"
+    custom-class="van-cell"
+    hover-class="van-cell--hover"
+    bind:click="onClick"
+  >
+    <slot
+      name="title"
+      slot="title"
+    />
+    <slot
+      name="icon"
+      slot="icon"
+    />
+    <slot name="value" />
+    <slot
+      name="right-icon"
+      slot="right-icon"
+    />
+  </van-cell>
+  <view
+    class="{{ utils.bem('collapse-item__wrapper', { transition }) }}"
+    style="height: {{ contentHeight }};"
+    bind:transitionend="onTransitionEnd"
+  >
+    <view
+      class="van-collapse-item__content content-class"
+    >
+      <slot />
+    </view>
+  </view>
+</view>

utils/dist/collapse-item/index.wxss

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+@import '../common/index.wxss';.van-collapse-item__title .van-cell__right-icon{-webkit-transform:rotate(90deg);transform:rotate(90deg);transition:-webkit-transform .3s;transition:transform .3s;transition:transform .3s,-webkit-transform .3s;transition:-webkit-transform var(--collapse-item-transition-duration,.3s);transition:transform var(--collapse-item-transition-duration,.3s);transition:transform var(--collapse-item-transition-duration,.3s),-webkit-transform var(--collapse-item-transition-duration,.3s)}.van-collapse-item__title--expanded .van-cell__right-icon{-webkit-transform:rotate(-90deg);transform:rotate(-90deg)}.van-collapse-item__title--disabled .van-cell,.van-collapse-item__title--disabled .van-cell__right-icon{color:#c8c9cc!important;color:var(--collapse-item-title-disabled-color,#c8c9cc)!important}.van-collapse-item__title--disabled .van-cell--hover{background-color:#fff!important;background-color:var(--white,#fff)!important}.van-collapse-item__wrapper{overflow:hidden}.van-collapse-item__wrapper--transition{transition:height .3s ease-in-out}.van-collapse-item__content{padding:15px;padding:var(--collapse-item-content-padding,15px);color:#969799;color:var(--collapse-item-content-text-color,#969799);font-size:13px;font-size:var(--collapse-item-content-font-size,13px);line-height:1.5;line-height:var(--collapse-item-content-line-height,1.5);background-color:#fff;background-color:var(--collapse-item-content-background-color,#fff)}