feat(Form): binding checkbox

src/mixins/checkbox.js

@@ -2,11 +2,12 @@
  * Common part of Checkbox & Radio
  */
 import Icon from '../icon';
+import { FieldMixin } from './field';
 import { ChildrenMixin } from './relation';
 import { addUnit } from '../utils';
 
 export const CheckboxMixin = ({ parent, bem, role }) => ({
-  mixins: [ChildrenMixin(parent)],
+  mixins: [ChildrenMixin(parent), FieldMixin],
 
   props: {
     name: null,

src/mixins/field.js

@@ -0,0 +1,13 @@
+export const FieldMixin = {
+  inject: {
+    vanField: {
+      default: null,
+    },
+  },
+
+  created() {
+    if (this.vanField) {
+      this.vanField.children = this;
+    }
+  },
+};