[improvement] extract relation mixin

2019-05-06 20:30:54 +08:00
parent 7014d67704
commit 8de7a287f6
3 changed files with 47 additions and 23 deletions
@@ -0,0 +1,37 @@
+export function ChildrenMixin(parent) {
+  return {
+    inject: [parent],
+
+    computed: {
+      parent() {
+        return this[parent];
+      }
+    },
+
+    created() {
+      const { children } = this.parent;
+      const index = this.parent.slots().indexOf(this.$vnode);
+      children.splice(index === -1 ? children.length : index, 0, this);
+    },
+
+    beforeDestroy() {
+      this.parent.children = this.parent.children.filter(item => item !== this);
+    }
+  };
+}
+
+export function ParentMixin(parent) {
+  return {
+    provide() {
+      return {
+        [parent]: this
+      };
+    },
+
+    data() {
+      return {
+        children: []
+      };
+    }
+  };
+}