[improvement] rename packages dir to src (#3659)

src/tabbar/index.js

@@ -0,0 +1,73 @@
+import { createNamespace } from '../utils';
+import { ParentMixin } from '../mixins/relation';
+
+const [createComponent, bem] = createNamespace('tabbar');
+
+export default createComponent({
+  mixins: [ParentMixin('vanTabbar')],
+
+  props: {
+    route: Boolean,
+    activeColor: String,
+    inactiveColor: String,
+    safeAreaInsetBottom: Boolean,
+    value: {
+      type: [String, Number],
+      default: 0
+    },
+    border: {
+      type: Boolean,
+      default: true
+    },
+    fixed: {
+      type: Boolean,
+      default: true
+    },
+    zIndex: {
+      type: Number,
+      default: 1
+    }
+  },
+
+  watch: {
+    children() {
+      this.setActiveItem();
+    },
+
+    value() {
+      this.setActiveItem();
+    }
+  },
+
+  methods: {
+    setActiveItem() {
+      this.children.forEach((item, index) => {
+        item.active = (item.name || index) === this.value;
+      });
+    },
+
+    onChange(active) {
+      if (active !== this.value) {
+        this.$emit('input', active);
+        this.$emit('change', active);
+      }
+    }
+  },
+
+  render(h) {
+    return (
+      <div
+        style={{ zIndex: this.zIndex }}
+        class={[
+          { 'van-hairline--top-bottom': this.border },
+          bem({
+            fixed: this.fixed,
+            'safe-area-inset-bottom': this.safeAreaInsetBottom
+          })
+        ]}
+      >
+        {this.slots()}
+      </div>
+    );
+  }
+});