调整分包，完成隐私协议（样式待优化）

node_modules/@vant/weapp/dist/tabbar/index.d.ts

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+export {};

node_modules/@vant/weapp/dist/tabbar/index.js

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+import { VantComponent } from '../common/component';
+import { useChildren } from '../common/relation';
+import { getRect } from '../common/utils';
+VantComponent({
+    relation: useChildren('tabbar-item', function () {
+        this.updateChildren();
+    }),
+    props: {
+        active: {
+            type: null,
+            observer: 'updateChildren',
+        },
+        activeColor: {
+            type: String,
+            observer: 'updateChildren',
+        },
+        inactiveColor: {
+            type: String,
+            observer: 'updateChildren',
+        },
+        fixed: {
+            type: Boolean,
+            value: true,
+            observer: 'setHeight',
+        },
+        placeholder: {
+            type: Boolean,
+            observer: 'setHeight',
+        },
+        border: {
+            type: Boolean,
+            value: true,
+        },
+        zIndex: {
+            type: Number,
+            value: 1,
+        },
+        safeAreaInsetBottom: {
+            type: Boolean,
+            value: true,
+        },
+    },
+    data: {
+        height: 50,
+    },
+    methods: {
+        updateChildren() {
+            const { children } = this;
+            if (!Array.isArray(children) || !children.length) {
+                return;
+            }
+            children.forEach((child) => child.updateFromParent());
+        },
+        setHeight() {
+            if (!this.data.fixed || !this.data.placeholder) {
+                return;
+            }
+            wx.nextTick(() => {
+                getRect(this, '.van-tabbar').then((res) => {
+                    this.setData({ height: res.height });
+                });
+            });
+        },
+    },
+});

node_modules/@vant/weapp/dist/tabbar/index.json

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+{
+  "component": true
+}

node_modules/@vant/weapp/dist/tabbar/index.wxml

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+<wxs src="../wxs/utils.wxs" module="utils" />
+
+<view
+  class="{{ border ? 'van-hairline--top-bottom' : '' }} {{ utils.bem('tabbar', { fixed, safe: safeAreaInsetBottom }) }} custom-class"
+  style="{{ zIndex ? 'z-index: ' + zIndex : '' }}"
+>
+  <slot />
+</view>
+
+<view wx:if="{{ fixed && placeholder }}" style="height: {{ height }}px;"></view>

node_modules/@vant/weapp/dist/tabbar/index.wxss

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+@import '../common/index.wxss';.van-tabbar{background-color:var(--tabbar-background-color,#fff);box-sizing:initial;display:flex;height:var(--tabbar-height,50px);width:100%}.van-tabbar--fixed{bottom:0;left:0;position:fixed}.van-tabbar--safe{padding-bottom:env(safe-area-inset-bottom)}