fix: componentDidMount exec not correct

packages/rax/src/vdom/__tests__/composite.js

@@ -494,13 +494,13 @@ describe('CompositeComponent', function() {
     expect(logs).toEqual([
       'componentWillMount1',
       'render1',
-      'componentDidMount1',
       'componentWillMount2',
       'render2',
-      'componentDidMount2',
       'componentWillMount3',
       'render3',
       'componentDidMount3',
+      'componentDidMount2',
+      'componentDidMount1',
       'componentDidMountErrorBoundary',
       'componentWillUnmount1',
       'componentWillUnmount2',
@@ -533,6 +533,50 @@ describe('CompositeComponent', function() {
     expect(container.childNodes[0].tagName).toBe('DIV');
   });
 
+  it('render component that componentDidMount could get mounted DOM', () => {
+    let container = createNodeElement('div');
+    class Child extends Component {
+      componentDidMount() {
+        expect(container.childNodes[0].tagName).toBe('DIV');
+      }
+      render() {
+        return <div />;
+      }
+    }
+    class App extends Component {
+      render() {
+        return <Child />;
+      }
+    }
+
+    const instance = render(<App />, container);
+    jest.runAllTimers();
+    expect(container.childNodes[0].tagName).toBe('DIV');
+  });
+
+  it('render with fragment that componentDidMount could get mounted DOM', () => {
+    let container = createNodeElement('div');
+    class Child extends Component {
+      componentDidMount() {
+        expect(container.childNodes[0].tagName).toBe('DIV');
+      }
+      render() {
+        return <div />;
+      }
+    }
+    class App extends Component {
+      render() {
+        return [
+          <Child key="1" />
+        ];
+      }
+    }
+
+    const instance = render(<App />, container);
+    jest.runAllTimers();
+    expect(container.childNodes[0].tagName).toBe('DIV');
+  });
+
   it('schedules sync updates when inside componentDidMount/Update', () => {
     let container = createNodeElement('div');
     let instance;

packages/rax/src/vdom/composite.js

@@ -59,7 +59,7 @@ if (process.env.NODE_ENV !== 'production') {
  * Composite Component
  */
 class CompositeComponent extends BaseComponent {
-  __mountComponent(parent, parentInstance, context, nativeNodeMounter) {
+  __mountComponent(parent, parentInstance, context, nativeNodeMounter, didMountWorks) {
     this.__initComponent(parent, parentInstance, context);
 
     if (process.env.NODE_ENV !== 'production') {
@@ -156,7 +156,8 @@ class CompositeComponent extends BaseComponent {
       this._parent,
       instance,
       this.__processChildContext(context),
-      nativeNodeMounter
+      nativeNodeMounter,
+      didMountWorks
     );
 
     if (error) {
@@ -168,15 +169,18 @@ class CompositeComponent extends BaseComponent {
     }
 
     if (instance.componentDidMount) {
-      performInSandbox(() => {
-        if (process.env.NODE_ENV !== 'production') {
-          measureLifeCycle(() => {
+      const didMount = () => {
+        performInSandbox(() => {
+          if (process.env.NODE_ENV !== 'production') {
+            measureLifeCycle(() => {
+              instance.componentDidMount();
+            }, this._mountID, 'componentDidMount');
+          } else {
             instance.componentDidMount();
-          }, this._mountID, 'componentDidMount');
-        } else {
-          instance.componentDidMount();
-        }
-      }, instance);
+          }
+        }, instance);
+      };
+      didMountWorks ? didMountWorks.push(didMount) : didMount();
     }
 
     // Trigger setState callback in componentWillMount or boundary callback after rendered

packages/rax/src/vdom/fragment.js

@@ -15,7 +15,8 @@ class FragmentComponent extends NativeComponent {
     instance[INTERNAL] = this;
 
     // Mount children
-    this.__mountChildren(this.__currentElement, context);
+    const didMountWorks = [];
+    this.__mountChildren(this.__currentElement, context, didMountWorks);
 
     let fragment = this.__getNativeNode();
 
@@ -27,6 +28,11 @@ class FragmentComponent extends NativeComponent {
       }
     }
 
+    let work;
+    while (work = didMountWorks.pop()) {
+      work();
+    }
+
     if (process.env.NODE_ENV !== 'production') {
       this.__currentElement.type = FragmentComponent;
       Host.reconciler.mountComponent(this);
@@ -35,15 +41,15 @@ class FragmentComponent extends NativeComponent {
     return instance;
   }
 
-  __mountChildren(children, context) {
+  __mountChildren(children, context, didMountWorks) {
     let fragment = this.__getNativeNode();
 
     return this.__mountChildrenImpl(this._parent, children, context, (nativeNode) => {
       nativeNode = toArray(nativeNode);
       for (let i = 0; i < nativeNode.length; i++) {
         fragment.push(nativeNode[i]);
       }
-    });
+    }, didMountWorks);
   }
 
   unmountComponent(shouldNotRemoveChild) {

packages/rax/src/vdom/native.js

@@ -42,8 +42,13 @@ export default class NativeComponent extends BaseComponent {
 
     if (appendType === TREE) {
       // Should after process children when mount by tree mode
-      this.__mountChildren(children, context);
+      const didMountWorks = [];
+      this.__mountChildren(children, context, didMountWorks);
       this.__mountNativeNode(nativeNodeMounter);
+      let work;
+      while (work = didMountWorks.pop()) {
+        work();
+      }
     } else {
       // Should before process children when mount by node mode
       this.__mountNativeNode(nativeNodeMounter);
@@ -62,14 +67,14 @@ export default class NativeComponent extends BaseComponent {
     return instance;
   }
 
-  __mountChildren(children, context) {
+  __mountChildren(children, context, didMountWorks) {
     if (children == null) return children;
 
     const nativeNode = this.__getNativeNode();
-    return this.__mountChildrenImpl(nativeNode, toArray(children), context);
+    return this.__mountChildrenImpl(nativeNode, toArray(children), context, null, didMountWorks);
   }
 
-  __mountChildrenImpl(parent, children, context, nativeNodeMounter) {
+  __mountChildrenImpl(parent, children, context, nativeNodeMounter, didMountWorks) {
     let renderedChildren = this.__renderedChildren = {};
 
     const renderedChildrenImage = [];
@@ -84,7 +89,8 @@ export default class NativeComponent extends BaseComponent {
         parent,
         this[INSTANCE],
         context,
-        nativeNodeMounter
+        nativeNodeMounter,
+        didMountWorks
       );
       renderedChildrenImage.push(mountImage);
     }