perf(ivy): removes generation of comments (#21638)

PR Close #21638

integration/_payload-limits.json

@@ -18,14 +18,14 @@
   "hello_world__render3__closure": {
     "master": {
       "uncompressed": {
-        "bundle": 7674
+        "bundle": 8153
       }
     }
   },
   "hello_world__render3__rollup": {
     "master": {
       "uncompressed": {
-        "bundle": 58662
+        "bundle": 59334
       }
     }
   }

packages/core/src/render3/instructions.ts

@@ -19,7 +19,7 @@ import {assertNodeType, assertNodeOfPossibleTypes} from './node_assert';
 import {appendChild, insertChild, insertView, processProjectedNode, removeView} from './node_manipulation';
 import {isNodeMatchingSelector} from './node_selector_matcher';
 import {ComponentDef, ComponentTemplate, ComponentType, DirectiveDef, DirectiveType} from './interfaces/definition';
-import {RComment, RElement, RText, Renderer3, RendererFactory3, ProceduralRenderer3, ObjectOrientedRenderer3, RendererStyleFlags3} from './interfaces/renderer';
+import {RElement, RText, Renderer3, RendererFactory3, ProceduralRenderer3, ObjectOrientedRenderer3, RendererStyleFlags3} from './interfaces/renderer';
 import {isDifferent, stringify} from './util';
 import {executeViewHooks, executeContentHooks, queueLifecycleHooks, queueInitHooks, executeInitHooks} from './hooks';
 
@@ -194,15 +194,14 @@ export function createLNode(
 export function createLNode(
     index: null, type: LNodeFlags.View, native: null, lView: LView): LViewNode;
 export function createLNode(
-    index: number, type: LNodeFlags.Container, native: RComment,
+    index: number, type: LNodeFlags.Container, native: null,
     lContainer: LContainer): LContainerNode;
 export function createLNode(
     index: number, type: LNodeFlags.Projection, native: null,
     lProjection: LProjection): LProjectionNode;
 export function createLNode(
-    index: number | null, type: LNodeFlags, native: RText | RElement | RComment | null,
-    state?: null | LView | LContainer | LProjection): LElementNode&LTextNode&LViewNode&
-    LContainerNode&LProjectionNode {
+    index: number | null, type: LNodeFlags, native: RText | RElement | null, state?: null | LView |
+        LContainer | LProjection): LElementNode&LTextNode&LViewNode&LContainerNode&LProjectionNode {
   const parent = isParent ? previousOrParentNode :
                             previousOrParentNode && previousOrParentNode.parent as LNode;
   let query = (isParent ? currentQuery : previousOrParentNode && previousOrParentNode.query) ||
@@ -218,7 +217,8 @@ export function createLNode(
     nodeInjector: parent ? parent.nodeInjector : null,
     data: isState ? state as any : null,
     query: query,
-    tNode: null
+    tNode: null,
+    pNextOrParent: null
   };
 
   if ((type & LNodeFlags.ViewOrElement) === LNodeFlags.ViewOrElement && isState) {
@@ -989,11 +989,14 @@ export function container(
   // If the direct parent of the container is a view, its views (including its comment)
   // will need to be added through insertView() when its parent view is being inserted.
   // For now, it is marked "headless" so we know to append its views later.
-  let comment = renderer.createComment(ngDevMode ? 'container' : '');
   let renderParent: LElementNode|null = null;
   const currentParent = isParent ? previousOrParentNode : previousOrParentNode.parent !;
   ngDevMode && assertNotEqual(currentParent, null, 'currentParent');
-  if (appendChild(currentParent, comment, currentView)) {
+
+  if ((currentParent.flags & LNodeFlags.TYPE_MASK) === LNodeFlags.Element &&
+      (currentParent.view !==
+           currentView /* Crossing View Boundaries, it is Component, but add Element of View */
+       || currentParent.data === null /* Regular Element. */)) {
     // we are adding to an Element which is either:
     // - Not a component (will not be re-projected, just added)
     // - View of the Component
@@ -1007,10 +1010,11 @@ export function container(
     next: null,
     parent: currentView,
     dynamicViewCount: 0,
-    query: null
+    query: null,
+    nextNative: undefined
   };
 
-  const node = createLNode(index, LNodeFlags.Container, comment, lContainer);
+  const node = createLNode(index, LNodeFlags.Container, null, lContainer);
 
   if (node.tNode == null) {
     // TODO(misko): implement queryName caching
@@ -1044,7 +1048,11 @@ export function containerRefreshStart(index: number): void {
   previousOrParentNode = data[index] as LNode;
   ngDevMode && assertNodeType(previousOrParentNode, LNodeFlags.Container);
   isParent = true;
-  (previousOrParentNode as LContainerNode).data.nextIndex = 0;
+  const container = previousOrParentNode as LContainerNode;
+  container.data.nextIndex = 0;
+  ngDevMode &&
+      assertEqual(
+          container.data.nextNative === undefined, true, 'container.data.nextNative === undefined');
 
   // We need to execute init hooks here so ngOnInit hooks are called in top level views
   // before they are called in embedded views (for backwards compatibility).
@@ -1066,6 +1074,7 @@ export function containerRefreshEnd(): void {
   }
   ngDevMode && assertNodeType(previousOrParentNode, LNodeFlags.Container);
   const container = previousOrParentNode as LContainerNode;
+  container.data.nextNative = undefined;
   ngDevMode && assertNodeType(container, LNodeFlags.Container);
   const nextIndex = container.data.nextIndex;
   while (nextIndex < container.data.views.length) {
@@ -1253,6 +1262,34 @@ export function projectionDef(index: number, selectors?: CssSelector[]): void {
   data[index] = distributedNodes;
 }
 
+/**
+ * Updates the linked list of a projection node, by appending another linked list.
+ *
+ * @param projectionNode Projection node whose projected nodes linked list has to be updated
+ * @param appendedFirst First node of the linked list to append.
+ * @param appendedLast Last node of the linked list to append.
+ */
+function appendToProjectionNode(
+    projectionNode: LProjectionNode,
+    appendedFirst: LElementNode | LTextNode | LContainerNode | null,
+    appendedLast: LElementNode | LTextNode | LContainerNode | null) {
+  // appendedFirst can be null if and only if appendedLast is also null
+  ngDevMode &&
+      assertEqual(!appendedFirst === !appendedLast, true, '!appendedFirst === !appendedLast');
+  if (!appendedLast) {
+    // nothing to append
+    return;
+  }
+  const projectionNodeData = projectionNode.data;
+  if (projectionNodeData.last) {
+    projectionNodeData.last.pNextOrParent = appendedFirst;
+  } else {
+    projectionNodeData.first = appendedFirst;
+  }
+  projectionNodeData.last = appendedLast;
+  appendedLast.pNextOrParent = projectionNode;
+}
+
 /**
  * Inserts previously re-distributed projected nodes. This instruction must be preceded by a call
  * to the projectionDef instruction.
@@ -1262,8 +1299,7 @@ export function projectionDef(index: number, selectors?: CssSelector[]): void {
  * @param selectorIndex - 0 means <ng-content> without any selector
  */
 export function projection(nodeIndex: number, localIndex: number, selectorIndex: number = 0): void {
-  const projectedNodes: LProjection = [];
-  const node = createLNode(nodeIndex, LNodeFlags.Projection, null, projectedNodes);
+  const node = createLNode(nodeIndex, LNodeFlags.Projection, null, {first: null, last: null});
   isParent = false;  // self closing
   const currentParent = node.parent;
 
@@ -1274,20 +1310,27 @@ export function projection(nodeIndex: number, localIndex: number, selectorIndex:
   const nodesForSelector =
       valueInData<LNode[][]>(componentNode.data !.data !, localIndex)[selectorIndex];
 
+  // build the linked list of projected nodes:
   for (let i = 0; i < nodesForSelector.length; i++) {
     const nodeToProject = nodesForSelector[i];
     if ((nodeToProject.flags & LNodeFlags.TYPE_MASK) === LNodeFlags.Projection) {
-      const previouslyProjectedNodes = (nodeToProject as LProjectionNode).data;
-      for (let j = 0; j < previouslyProjectedNodes.length; j++) {
-        processProjectedNode(
-            projectedNodes, previouslyProjectedNodes[j], currentParent, currentView);
-      }
+      const previouslyProjected = (nodeToProject as LProjectionNode).data;
+      appendToProjectionNode(node, previouslyProjected.first, previouslyProjected.last);
     } else {
-      processProjectedNode(
-          projectedNodes, nodeToProject as LElementNode | LTextNode | LContainerNode, currentParent,
-          currentView);
+      appendToProjectionNode(
+          node, nodeToProject as LTextNode | LElementNode | LContainerNode,
+          nodeToProject as LTextNode | LElementNode | LContainerNode);
     }
   }
+
+  // process each node in the list of projected nodes:
+  let nodeToProject: LNode|null = node.data.first;
+  const lastNodeToProject = node.data.last;
+  while (nodeToProject) {
+    processProjectedNode(
+        nodeToProject as LTextNode | LElementNode | LContainerNode, currentParent, currentView);
+    nodeToProject = nodeToProject === lastNodeToProject ? null : nodeToProject.pNextOrParent;
+  }
 }
 
 /**

packages/core/src/render3/interfaces/container.ts

@@ -9,6 +9,7 @@
 import {ComponentTemplate} from './definition';
 import {LElementNode, LViewNode} from './node';
 import {LQuery} from './query';
+import {RNode} from './renderer';
 import {LView, TView} from './view';
 
 
@@ -80,6 +81,15 @@ export interface LContainer {
    * this container are reported to queries referenced here.
    */
   query: LQuery|null;
+
+  /*
+   * Caches the reference of the first native node following this container in the same native
+   * parent.
+   * This is reset to undefined in containerRefreshEnd.
+   * When it is undefined, it means the value has not been computed yet.
+   * Otherwise, it contains the result of findBeforeNode(container, null).
+   */
+  nextNative: RNode|null|undefined;
 }
 
 /**

packages/core/src/render3/interfaces/node.ts

@@ -11,7 +11,7 @@ import {DirectiveDef} from './definition';
 import {LInjector} from './injector';
 import {LProjection} from './projection';
 import {LQuery} from './query';
-import {RComment, RElement, RText} from './renderer';
+import {RElement, RText} from './renderer';
 import {LView, TData, TView} from './view';
 
 
@@ -74,9 +74,8 @@ export interface LNode {
    * The associated DOM node. Storing this allows us to:
    *  - append children to their element parents in the DOM (e.g. `parent.native.appendChild(...)`)
    *  - retrieve the sibling elements of text nodes whose creation / insertion has been delayed
-   *  - mark locations where child views should be inserted (for containers)
    */
-  readonly native: RElement|RText|RComment|null;
+  readonly native: RElement|RText|null;
 
   /**
    * We need a reference to a node's parent so we can append the node to its parent's native
@@ -122,6 +121,14 @@ export interface LNode {
    */
   query: LQuery|null;
 
+  /**
+   * If this node is projected, pointer to the next node in the same projection parent
+   * (which is a container, an element, or a text node), or to the parent projection node
+   * if this is the last node in the projection.
+   * If this node is not projected, this field is null.
+   */
+  pNextOrParent: LNode|null;
+
   /**
    * Pointer to the corresponding TNode object, which stores static
    * data about this node.
@@ -170,14 +177,7 @@ export interface LViewNode extends LNode {
 
 /** Abstract node container which contains other views. */
 export interface LContainerNode extends LNode {
-  /**
-   * This comment node is appended to the container's parent element to mark where
-   * in the DOM the container's child views should be added.
-   *
-   * If the container is a root node of a view, this comment will not be appended
-   * until the parent view is processed.
-   */
-  readonly native: RComment;
+  readonly native: null;
   readonly data: LContainer;
   child: null;
   next: LContainerNode|LElementNode|LTextNode|LProjectionNode|null;

packages/core/src/render3/interfaces/projection.ts

@@ -9,14 +9,13 @@
 import {LContainerNode, LElementNode, LTextNode} from './node';
 
 /**
- * An LProjection is just an array of projected nodes.
- *
- * It would be nice if we could not need an array, but since a projected node can be
- * re-projected, the same node can be part of more than one LProjectionNode which makes
- * list approach not possible.
+ * An LProjection is a pointer to the first and the last projected nodes.
+ * It is a linked list (using the pNextOrParent property).
  */
-export type LProjection = Array<LElementNode|LTextNode|LContainerNode>;
-
+export interface LProjection {
+  first: LElementNode|LTextNode|LContainerNode|null;
+  last: LElementNode|LTextNode|LContainerNode|null;
+}
 
 /**
  * Parsed selector in the following format:

packages/core/src/render3/interfaces/renderer.ts

@@ -35,7 +35,6 @@ export type Renderer3 = ObjectOrientedRenderer3 | ProceduralRenderer3;
  * (reducing payload size).
  * */
 export interface ObjectOrientedRenderer3 {
-  createComment(data: string): RComment;
   createElement(tagName: string): RElement;
   createTextNode(data: string): RText;
 
@@ -52,7 +51,6 @@ export interface ObjectOrientedRenderer3 {
 export interface ProceduralRenderer3 {
   destroy(): void;
   createElement(name: string, namespace?: string|null): RElement;
-  createComment(value: string): RComment;
   createText(value: string): RText;
   /**
    * This property is allowed to be null / undefined,
@@ -138,8 +136,6 @@ export interface RDomTokenList {
 
 export interface RText extends RNode { textContent: string|null; }
 
-export interface RComment extends RNode {}
-
 // Note: This hack is necessary so we don't erroneously get a circular dependency
 // failure based on types.
 export const unusedValueExportToPlacateAjd = 1;

packages/core/src/render3/node_manipulation.ts

@@ -6,65 +6,135 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {assertNotNull} from './assert';
+import {assertNotEqual, assertNotNull} from './assert';
 import {LContainer, unusedValueExportToPlacateAjd as unused1} from './interfaces/container';
 import {LContainerNode, LElementNode, LNode, LNodeFlags, LProjectionNode, LTextNode, LViewNode, unusedValueExportToPlacateAjd as unused2} from './interfaces/node';
-import {LProjection, unusedValueExportToPlacateAjd as unused3} from './interfaces/projection';
-import {ProceduralRenderer3, RComment, RElement, RNode, RText, unusedValueExportToPlacateAjd as unused4} from './interfaces/renderer';
+import {unusedValueExportToPlacateAjd as unused3} from './interfaces/projection';
+import {ProceduralRenderer3, RElement, RNode, RText, unusedValueExportToPlacateAjd as unused4} from './interfaces/renderer';
 import {HookData, LView, LViewOrLContainer, TView, unusedValueExportToPlacateAjd as unused5} from './interfaces/view';
 import {assertNodeType} from './node_assert';
 
 const unusedValueToPlacateAjd = unused1 + unused2 + unused3 + unused4 + unused5;
 
 /**
- * Finds the closest DOM node above a given container in the hierarchy.
+ * Returns the first DOM node following the given logical node in the same parent DOM element.
  *
- * This is necessary to add or remove elements from the DOM when a view
- * is added or removed from the container. e.g. parent.removeChild(...)
+ * This is needed in order to insert the given node with insertBefore.
  *
- * @param containerNode The container node whose parent must be found
- * @returns Closest DOM node above the container
+ * @param node The node whose following DOM node must be found.
+ * @param stopNode A parent node at which the lookup in the tree should be stopped, or null if the
+ * lookup should not be stopped until the result is found.
+ * @returns Node before which the provided node should be inserted or null if the lookup was stopped
+ * or if there is no native node after the given logical node in the same native parent.
  */
-export function findNativeParent(containerNode: LContainerNode): RNode|null {
-  let container: LContainerNode|null = containerNode;
-  while (container) {
-    ngDevMode && assertNodeType(container, LNodeFlags.Container);
-    const renderParent = container.data.renderParent;
-    if (renderParent !== null) {
-      return renderParent.native;
+function findBeforeNode(node: LNode | null, stopNode: LNode | null): RNode|null {
+  let currentNode = node;
+  while (currentNode && currentNode !== stopNode) {
+    const currentNodeType = currentNode.flags && LNodeFlags.TYPE_MASK;
+    let pNextOrParent = currentNode.pNextOrParent;
+    if (pNextOrParent) {
+      let pNextOrParentType = pNextOrParent.flags & LNodeFlags.TYPE_MASK;
+      while (pNextOrParentType !== LNodeFlags.Projection) {
+        const nativeNode = findFirstNativeNode(pNextOrParent);
+        if (nativeNode) {
+          return nativeNode;
+        }
+        pNextOrParent = pNextOrParent.pNextOrParent !;
+      }
+      currentNode = pNextOrParent;
+    } else {
+      let currentSibling = currentNode.next;
+      while (currentSibling) {
+        const nativeNode = findFirstNativeNode(currentSibling);
+        if (nativeNode) {
+          return nativeNode;
+        }
+        currentSibling = currentSibling.next;
+      }
+      const parentNode = currentNode.parent;
+      currentNode = null;
+      if (parentNode) {
+        const parentType = parentNode.flags & LNodeFlags.TYPE_MASK;
+        if (parentType === LNodeFlags.Container || parentType === LNodeFlags.View) {
+          currentNode = parentNode;
+        }
       }
-    const viewOrElement: LViewNode|LElementNode = container.parent !;
-    ngDevMode && assertNotNull(viewOrElement, 'container.parent');
-    if ((viewOrElement.flags & LNodeFlags.TYPE_MASK) === LNodeFlags.Element) {
-      // we are an LElement, which means we are past the last LContainer.
-      // This means than we have not been projected so just ignore.
-      return null;
     }
-    ngDevMode && assertNodeType(viewOrElement, LNodeFlags.View);
-    container = (viewOrElement as LViewNode).parent;
   }
   return null;
 }
 
 /**
- * Finds the DOM element before which a certain view should be inserting its
- * child elements.
- *
- * If the view has a next (e.g. for loop), elements should be inserted before
- * the next view's first child element. Otherwise, the container's comment
- * anchor is the marker.
- *
- * @param index The index of the view to check
- * @param lContainer parent LContainer
- * @param native Comment anchor for container
- * @returns The DOM element for which the view should insert elements
+ * Get the next node in the LNode tree, taking into account the place where a node is
+ * projected (in the shadow DOM) rather than where it comes from (in the light DOM).
+ * If the node is not projected, the return value is simply node.next.
+ * If the node is projected, the return value is node.pNextOrParent if node.pNextOrParent is
+ * not a projection node (which marks the end of the linked list).
+ * Otherwise the return value is null.
+ * @param node The node whose next node in the LNode tree must be found.
+ * @return The next sibling in the LNode tree.
  */
-function findBeforeNode(index: number, lContainer: LContainer, native: RNode): RNode {
-  const views = lContainer.views;
-  // Find the node to insert in front of
-  return index + 1 < views.length ?
-      (views[index + 1].child as LTextNode | LElementNode | LContainerNode).native :
-      native;
+function getNextNode(node: LNode): LNode|null {
+  const pNextOrParent = node.pNextOrParent;
+  if (pNextOrParent) {
+    const type = pNextOrParent.flags & LNodeFlags.TYPE_MASK;
+    return type === LNodeFlags.Projection ? null : pNextOrParent;
+  } else {
+    return node.next;
+  }
+}
+
+/**
+ * Find the next node in the LNode tree, taking into account the place where a node is
+ * projected (in the shadow DOM) rather than where it comes from (in the light DOM).
+ * If there is no sibling node, this function goes to the next sibling of the parent node...
+ * until it reaches rootNode (at which point null is returned).
+ *
+ * @param initialNode The node whose following node in the LNode tree must be found.
+ * @param rootNode The root node at which the lookup should stop.
+ * @return The following node in the LNode tree.
+ */
+function findFollowingNode(initialNode: LNode, rootNode: LNode): LNode|null {
+  let node: LNode|null = initialNode;
+  let nextNode = getNextNode(node);
+  while (node && !nextNode) {
+    // if node.pNextOrParent is not null here, it is not the next node
+    // (because, at this point, nextNode is null, so it is the parent)
+    node = node.pNextOrParent || node.parent;
+    if (node === rootNode) node = null;
+    nextNode = node && getNextNode(node);
+  }
+  return nextNode;
+}
+
+/**
+ * Returns the first DOM node inside the given logical node.
+ *
+ * @param node The node whose first DOM node must be found
+ * @returns The first native node of the given logical node or null if there is none.
+ */
+function findFirstNativeNode(rootNode: LNode): RNode|null {
+  let node: LNode|null = rootNode;
+  while (node) {
+    const type = node.flags & LNodeFlags.TYPE_MASK;
+    let nextNode: LNode|null = null;
+    if (type === LNodeFlags.Element) {
+      return node.native;
+    } else if (type === LNodeFlags.Container) {
+      const childContainerData: LContainer = (node as LContainerNode).data;
+      nextNode = childContainerData.views.length ? childContainerData.views[0].child : null;
+    } else if (type === LNodeFlags.Projection) {
+      nextNode = (node as LProjectionNode).data.first;
+    } else {
+      nextNode = (node as LViewNode).child;
+    }
+    if (nextNode === null) {
+      node = findFollowingNode(node, rootNode);
+    } else {
+      node = nextNode;
+    }
+  }
+  return null;
 }
 
 /**
@@ -89,7 +159,8 @@ export function addRemoveViewFromContainer(
     beforeNode?: RNode | null): void {
   ngDevMode && assertNodeType(container, LNodeFlags.Container);
   ngDevMode && assertNodeType(rootNode, LNodeFlags.View);
-  const parent = findNativeParent(container);
+  const parentNode = container.data.renderParent;
+  const parent = parentNode ? parentNode.native : null;
   let node: LNode|null = rootNode.child;
   if (parent) {
     while (node) {
@@ -111,26 +182,15 @@ export function addRemoveViewFromContainer(
         // if we get to a container, it must be a root node of a view because we are only
         // propagating down into child views / containers and not child elements
         const childContainerData: LContainer = (node as LContainerNode).data;
-        insertMode ? (isFnRenderer ?
-                          (renderer as ProceduralRenderer3)
-                              .appendChild !(parent as RElement, node.native !) :
-                          parent.appendChild(node.native !)) :
-                     (isFnRenderer ?
-                          (renderer as ProceduralRenderer3)
-                              .removeChild !(parent as RElement, node.native !) :
-                          parent.removeChild(node.native !));
+        childContainerData.renderParent = parentNode;
         nextNode = childContainerData.views.length ? childContainerData.views[0].child : null;
       } else if (type === LNodeFlags.Projection) {
-        nextNode = (node as LProjectionNode).data[0];
+        nextNode = (node as LProjectionNode).data.first;
       } else {
         nextNode = (node as LViewNode).child;
       }
       if (nextNode === null) {
-        while (node && !node.next) {
-          node = node.parent;
-          if (node === rootNode) node = null;
-        }
-        node = node && node.next;
+        node = findFollowingNode(node, rootNode);
       } else {
         node = nextNode;
       }
@@ -218,8 +278,15 @@ export function insertView(
   // and we should wait until that parent processes its nodes (otherwise, we will insert this view's
   // nodes twice - once now and once when its parent inserts its views).
   if (container.data.renderParent !== null) {
-    addRemoveViewFromContainer(
-        container, newView, true, findBeforeNode(index, state, container.native));
+    let beforeNode = findBeforeNode(newView, container);
+    if (!beforeNode) {
+      let containerNextNativeNode = container.data.nextNative;
+      if (containerNextNativeNode === undefined) {
+        containerNextNativeNode = container.data.nextNative = findBeforeNode(container, null);
+      }
+      beforeNode = containerNextNativeNode;
+    }
+    addRemoveViewFromContainer(container, newView, true, beforeNode);
   }
 
   return newView;
@@ -389,11 +456,7 @@ export function insertChild(node: LNode, currentView: LView): void {
        || parent.data === null /* Regular Element. */)) {
     // We only add element if not in View or not projected.
 
-    let sibling = node.next;
-    let nativeSibling: RNode|null = null;
-    while (sibling && (nativeSibling = sibling.native) === null) {
-      sibling = sibling.next;
-    }
+    let nativeSibling: RNode|null = findBeforeNode(node, null);
     const renderer = currentView.renderer;
     (renderer as ProceduralRenderer3).listen ?
         (renderer as ProceduralRenderer3)
@@ -407,14 +470,13 @@ export function insertChild(node: LNode, currentView: LView): void {
  * appends the nodes from all of the container's active views to the DOM. Also stores the
  * node in the given projectedNodes array.
  *
- * @param projectedNodes Array to store the projected node
  * @param node The node to process
  * @param currentParent The last parent element to be processed
  * @param currentView Current LView
  */
 export function processProjectedNode(
-    projectedNodes: LProjection, node: LElementNode | LTextNode | LContainerNode,
-    currentParent: LViewNode | LElementNode, currentView: LView): void {
+    node: LElementNode | LTextNode | LContainerNode, currentParent: LViewNode | LElementNode,
+    currentView: LView): void {
   if ((node.flags & LNodeFlags.TYPE_MASK) === LNodeFlags.Container &&
       (currentParent.flags & LNodeFlags.TYPE_MASK) === LNodeFlags.Element &&
       (currentParent.data === null || currentParent.data === currentView)) {
@@ -430,6 +492,5 @@ export function processProjectedNode(
       addRemoveViewFromContainer(node as LContainerNode, views[i], true, null);
     }
   }
-  projectedNodes.push(node);
   appendChild(currentParent, node.native, currentView);
 }

packages/core/test/render3/component_spec.ts

@@ -7,11 +7,11 @@
  */
 
 import {ViewEncapsulation} from '../../src/core';
-import {E, T, b, defineComponent, e, markDirty, r, t} from '../../src/render3/index';
+import {C, E, T, V, b, cR, cr, defineComponent, e, markDirty, p, r, t, v} from '../../src/render3/index';
 import {createRendererType2} from '../../src/view/index';
 
 import {getRendererFactory2} from './imported_renderer2';
-import {containerEl, renderComponent, requestAnimationFrame, toHtml} from './render_util';
+import {containerEl, renderComponent, renderToHtml, requestAnimationFrame, toHtml} from './render_util';
 
 describe('component', () => {
   class CounterComponent {
@@ -59,6 +59,70 @@ describe('component', () => {
 
 });
 
+describe('component with a container', () => {
+
+  function showItems(ctx: {items: string[]}, cm: boolean) {
+    if (cm) {
+      C(0);
+    }
+    cR(0);
+    {
+      for (const item of ctx.items) {
+        const cm0 = V(0);
+        {
+          if (cm0) {
+            T(0);
+          }
+          t(0, b(item));
+        }
+        v();
+      }
+    }
+    cr();
+  }
+
+  class WrapperComponent {
+    items: string[];
+    static ngComponentDef = defineComponent({
+      type: WrapperComponent,
+      tag: 'wrapper',
+      template: function ChildComponentTemplate(ctx: {items: string[]}, cm: boolean) {
+        if (cm) {
+          C(0);
+        }
+        cR(0);
+        {
+          const cm0 = V(0);
+          { showItems({items: ctx.items}, cm0); }
+          v();
+        }
+        cr();
+      },
+      factory: () => new WrapperComponent,
+      inputs: {items: 'items'}
+    });
+  }
+
+  function template(ctx: {items: string[]}, cm: boolean) {
+    if (cm) {
+      E(0, WrapperComponent);
+      e();
+    }
+    p(0, 'items', b(ctx.items));
+    WrapperComponent.ngComponentDef.h(1, 0);
+    r(1, 0);
+  }
+
+  it('should re-render on input change', () => {
+    const ctx: {items: string[]} = {items: ['a']};
+    expect(renderToHtml(template, ctx)).toEqual('<wrapper>a</wrapper>');
+
+    ctx.items = [...ctx.items, 'b'];
+    expect(renderToHtml(template, ctx)).toEqual('<wrapper>ab</wrapper>');
+  });
+
+});
+
 // TODO: add tests with Native once tests are run in real browser (domino doesn't support shadow
 // root)
 describe('encapsulation', () => {

packages/core/test/render3/content_spec.ts

@@ -377,6 +377,61 @@ describe('content projection', () => {
        expect(toHtml(parent)).toEqual('<child><div></div></child>');
      });
 
+  it('should support projection in embedded views when ng-content is a root node of an embedded view, with other nodes after',
+     () => {
+       let childCmptInstance: any;
+
+       /**
+        * <div>
+        *  % if (!skipContent) {
+        *    before-<ng-content></ng-content>-after
+        *  % }
+        * </div>
+        */
+       const Child = createComponent('child', function(ctx: any, cm: boolean) {
+         if (cm) {
+           pD(0);
+           E(1, 'div');
+           { C(2); }
+           e();
+         }
+         cR(2);
+         {
+           if (!ctx.skipContent) {
+             if (V(0)) {
+               T(0, 'before-');
+               P(1, 0);
+               T(2, '-after');
+             }
+             v();
+           }
+         }
+         cr();
+       });
+
+       /**
+        * <child>content</child>
+        */
+       const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
+         if (cm) {
+           E(0, Child);
+           {
+             childCmptInstance = m(1);
+             T(2, 'content');
+           }
+           e();
+         }
+         Child.ngComponentDef.h(1, 0);
+         r(1, 0);
+       });
+       const parent = renderComponent(Parent);
+       expect(toHtml(parent)).toEqual('<child><div>before-content-after</div></child>');
+
+       childCmptInstance.skipContent = true;
+       detectChanges(parent);
+       expect(toHtml(parent)).toEqual('<child><div></div></child>');
+     });
+
   it('should project nodes into the last ng-content', () => {
     /**
      * <div><ng-content></ng-content></div>

packages/core/test/render3/integration_spec.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {C, E, NC, T, V, a, b, b1, b2, b3, b4, b5, b6, b7, b8, bV, cR, cr, defineComponent, e, k, m, p, r, s, t, v} from '../../src/render3/index';
+import {C, E, NC, P, T, V, a, b, b1, b2, b3, b4, b5, b6, b7, b8, bV, cR, cr, defineComponent, e, k, m, p, pD, r, s, t, v} from '../../src/render3/index';
 import {NO_CHANGE} from '../../src/render3/instructions';
 
 import {containerEl, renderToHtml} from './render_util';
@@ -393,6 +393,142 @@ describe('render3 integration test', () => {
 
   });
 
+  describe('tree', () => {
+    interface Tree {
+      beforeLabel?: string;
+      subTrees?: Tree[];
+      afterLabel?: string;
+    }
+
+    interface ParentCtx {
+      beforeTree: Tree;
+      projectedTree: Tree;
+      afterTree: Tree;
+    }
+
+    function showLabel(ctx: {label: string | undefined}, cm: boolean) {
+      if (cm) {
+        C(0);
+      }
+      cR(0);
+      {
+        if (ctx.label != null) {
+          if (V(0)) {
+            T(0);
+          }
+          t(0, b(ctx.label));
+          v();
+        }
+      }
+      cr();
+    }
+
+    function showTree(ctx: {tree: Tree}, cm: boolean) {
+      if (cm) {
+        C(0);
+        C(1);
+        C(2);
+      }
+      cR(0);
+      {
+        const cm0 = V(0);
+        { showLabel({label: ctx.tree.beforeLabel}, cm0); }
+        v();
+      }
+      cr();
+      cR(1);
+      {
+        for (let subTree of ctx.tree.subTrees || []) {
+          const cm0 = V(0);
+          { showTree({tree: subTree}, cm0); }
+          v();
+        }
+      }
+      cr();
+      cR(2);
+      {
+        const cm0 = V(0);
+        { showLabel({label: ctx.tree.afterLabel}, cm0); }
+        v();
+      }
+      cr();
+    }
+
+    class ChildComponent {
+      beforeTree: Tree;
+      afterTree: Tree;
+      static ngComponentDef = defineComponent({
+        tag: 'child',
+        type: ChildComponent,
+        template: function ChildComponentTemplate(
+            ctx: {beforeTree: Tree, afterTree: Tree}, cm: boolean) {
+          if (cm) {
+            pD(0);
+            C(1);
+            P(2, 0);
+            C(3);
+          }
+          cR(1);
+          {
+            const cm0 = V(0);
+            { showTree({tree: ctx.beforeTree}, cm0); }
+            v();
+          }
+          cr();
+          cR(3);
+          {
+            const cm0 = V(0);
+            { showTree({tree: ctx.afterTree}, cm0); }
+            v();
+          }
+          cr();
+        },
+        factory: () => new ChildComponent,
+        inputs: {beforeTree: 'beforeTree', afterTree: 'afterTree'}
+      });
+    }
+
+    function parentTemplate(ctx: ParentCtx, cm: boolean) {
+      if (cm) {
+        E(0, ChildComponent);
+        { C(2); }
+        e();
+      }
+      p(0, 'beforeTree', b(ctx.beforeTree));
+      p(0, 'afterTree', b(ctx.afterTree));
+      cR(2);
+      {
+        const cm0 = V(0);
+        { showTree({tree: ctx.projectedTree}, cm0); }
+        v();
+      }
+      cr();
+      ChildComponent.ngComponentDef.h(1, 0);
+      r(1, 0);
+    }
+
+    it('should work with a tree', () => {
+
+      const ctx: ParentCtx = {
+        beforeTree: {subTrees: [{beforeLabel: 'a'}]},
+        projectedTree: {beforeLabel: 'p'},
+        afterTree: {afterLabel: 'z'}
+      };
+      expect(renderToHtml(parentTemplate, ctx)).toEqual('<child>apz</child>');
+      ctx.projectedTree = {subTrees: [{}, {}, {subTrees: [{}, {}]}, {}]};
+      ctx.beforeTree.subTrees !.push({afterLabel: 'b'});
+      expect(renderToHtml(parentTemplate, ctx)).toEqual('<child>abz</child>');
+      ctx.projectedTree.subTrees ![1].afterLabel = 'h';
+      expect(renderToHtml(parentTemplate, ctx)).toEqual('<child>abhz</child>');
+      ctx.beforeTree.subTrees !.push({beforeLabel: 'c'});
+      expect(renderToHtml(parentTemplate, ctx)).toEqual('<child>abchz</child>');
+
+      // To check the context easily:
+      // console.log(JSON.stringify(ctx));
+    });
+
+  });
+
   describe('element bindings', () => {
 
     describe('elementAttribute', () => {

packages/core/test/render3/query_spec.ts

@@ -296,7 +296,7 @@ describe('query', () => {
       expect(isViewContainerRef(query.first)).toBeTruthy();
     });
 
-    it('should read ElementRef with a native element pointing to comment DOM node from containers',
+    it('should no longer read ElementRef with a native element pointing to comment DOM node from containers',
        () => {
          /**
           * <ng-template #foo></ng-template>
@@ -316,8 +316,7 @@ describe('query', () => {
          const cmptInstance = renderComponent(Cmpt);
          const query = (cmptInstance.query as QueryList<any>);
          expect(query.length).toBe(1);
-         expect(isElementRef(query.first)).toBeTruthy();
-         expect(query.first.nativeElement.nodeType).toBe(8);  // Node.COMMENT_NODE = 8
+         expect(query.first.nativeElement).toBe(null);
        });
 
     it('should read TemplateRef from container nodes by default', () => {