智慧宿舍系统小程序

wechat/miniprogram/node_modules/@vant/weapp/dist/sidebar/index.js

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+import { VantComponent } from '../common/component';
+import { useChildren } from '../common/relation';
+VantComponent({
+  relation: useChildren('sidebar-item', function () {
+    this.setActive(this.data.activeKey);
+  }),
+  props: {
+    activeKey: {
+      type: Number,
+      value: 0,
+      observer: 'setActive',
+    },
+  },
+  beforeCreate() {
+    this.currentActive = -1;
+  },
+  methods: {
+    setActive(activeKey) {
+      const { children, currentActive } = this;
+      if (!children.length) {
+        return Promise.resolve();
+      }
+      this.currentActive = activeKey;
+      const stack = [];
+      if (currentActive !== activeKey && children[currentActive]) {
+        stack.push(children[currentActive].setActive(false));
+      }
+      if (children[activeKey]) {
+        stack.push(children[activeKey].setActive(true));
+      }
+      return Promise.all(stack);
+    },
+  },
+});