vant

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

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+export {};

utils/dist/tabbar-item/index.js

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+import { VantComponent } from '../common/component';
+VantComponent({
+    props: {
+        info: null,
+        name: null,
+        icon: String,
+        dot: Boolean
+    },
+    relation: {
+        name: 'tabbar',
+        type: 'ancestor'
+    },
+    data: {
+        active: false
+    },
+    methods: {
+        onClick() {
+            if (this.parent) {
+                this.parent.onChange(this);
+            }
+            this.$emit('click');
+        },
+        updateFromParent() {
+            const { parent } = this;
+            if (!parent) {
+                return;
+            }
+            const index = parent.children.indexOf(this);
+            const parentData = parent.data;
+            const { data } = this;
+            const active = (data.name || index) === parentData.active;
+            const patch = {};
+            if (active !== data.active) {
+                patch.active = active;
+            }
+            if (parentData.activeColor !== data.activeColor) {
+                patch.activeColor = parentData.activeColor;
+            }
+            if (parentData.inactiveColor !== data.inactiveColor) {
+                patch.inactiveColor = parentData.inactiveColor;
+            }
+            return Object.keys(patch).length > 0
+                ? this.set(patch)
+                : Promise.resolve();
+        }
+    }
+});

utils/dist/tabbar-item/index.json

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

utils/dist/tabbar-item/index.wxml

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+<wxs src="../wxs/utils.wxs" module="utils" />
+
+<view
+  class="{{ utils.bem('tabbar-item', { active }) }} custom-class"
+  style="color: {{ active ? activeColor : inactiveColor }}"
+  bind:tap="onClick"
+>
+  <view class="van-tabbar-item__icon">
+    <van-icon
+      wx:if="{{ icon }}"
+      name="{{ icon }}"
+      custom-class="van-tabbar-item__icon__inner"
+    />
+    <block wx:else>
+      <slot
+        wx:if="{{ active }}"
+        name="icon-active"
+      />
+      <slot wx:else name="icon" />
+    </block>
+    <van-info
+      dot="{{ dot }}"
+      info="{{ info }}"
+      custom-class="van-tabbar-item__info"
+    />
+  </view>
+  <view class="van-tabbar-item__text">
+    <slot />
+  </view>
+</view>

utils/dist/tabbar-item/index.wxss

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+@import '../common/index.wxss';:host{-webkit-flex:1;flex:1}.van-tabbar-item{display:-webkit-flex;display:flex;-webkit-flex-direction:column;flex-direction:column;-webkit-align-items:center;align-items:center;-webkit-justify-content:center;justify-content:center;height:100%;color:#646566;color:var(--tabbar-item-text-color,#646566);font-size:12px;font-size:var(--tabbar-item-font-size,12px);line-height:1;line-height:var(--tabbar-item-line-height,1)}.van-tabbar-item__icon{position:relative;margin-bottom:5px;margin-bottom:var(--tabbar-item-margin-bottom,5px);font-size:18px;font-size:var(--tabbar-item-icon-size,18px)}.van-tabbar-item__icon__inner{display:block;min-width:1em}.van-tabbar-item--active{color:#1989fa;color:var(--tabbar-item-active-color,#1989fa)}.van-tabbar-item__info{margin-top:2px}