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

src/radio/index.js

@@ -0,0 +1,42 @@
+import { createNamespace } from '../utils';
+import { CheckboxMixin } from '../mixins/checkbox';
+
+const [createComponent, bem] = createNamespace('radio');
+
+export default createComponent({
+  mixins: [CheckboxMixin({
+    bem,
+    role: 'radio',
+    parent: 'vanRadio'
+  })],
+
+  computed: {
+    currentValue: {
+      get() {
+        return this.parent ? this.parent.value : this.value;
+      },
+
+      set(val) {
+        (this.parent || this).$emit('input', val);
+      }
+    },
+
+    checked() {
+      return this.currentValue === this.name;
+    }
+  },
+
+  methods: {
+    onClickIcon() {
+      if (!this.isDisabled) {
+        this.currentValue = this.name;
+      }
+    },
+
+    onClickLabel() {
+      if (!this.isDisabled && !this.labelDisabled) {
+        this.currentValue = this.name;
+      }
+    }
+  }
+});