fix(runtime): create unique host ids

src/declarations/stencil-private.ts

@@ -31,6 +31,13 @@ import type {
 import type { JsonDocMethodParameter } from './stencil-public-docs';
 import type { ComponentInterface, ListenTargetOptions, VNode } from './stencil-public-runtime';
 
+export interface DocData {
+  hostIds: number;
+  rootLevelIds: number;
+  staticComponents: Set<string>;
+}
+export type StencilDocument = Document & { _stencilDocData: DocData };
+
 export interface SourceMap {
   file: string;
   mappings: string;

src/hydrate/runner/window-initialize.ts

@@ -1,8 +1,19 @@
 import { constrainTimeouts, type MockWindow } from '@stencil/core/mock-doc';
+import { STENCIL_DOC_DATA } from 'src/runtime/runtime-constants';
 
 import type * as d from '../../declarations';
 import { runtimeLogging } from './runtime-log';
 
+/**
+ * Maintain a unique `docData` object across multiple hydration runs
+ * to ensure that host ids remain unique.
+ */
+const docData: d.DocData = {
+  hostIds: 0,
+  rootLevelIds: 0,
+  staticComponents: new Set<string>(),
+} as d.DocData;
+
 export function initializeWindow(
   win: MockWindow,
   doc: Document,
@@ -58,5 +69,7 @@ export function initializeWindow(
 
   runtimeLogging(win, opts, results);
 
+  (doc as d.StencilDocument)[STENCIL_DOC_DATA] = docData;
+
   return win;
 }

src/runtime/runtime-constants.ts

@@ -60,6 +60,13 @@ export const HYDRATED_STYLE_ID = 'sty-id';
 export const HYDRATE_CHILD_ID = 'c-id';
 export const HYDRATED_CSS = '{visibility:hidden}.hydrated{visibility:inherit}';
 
+export const STENCIL_DOC_DATA = '_stencilDocData';
+export const DEFAULT_DOC_DATA = {
+  hostIds: 0,
+  rootLevelIds: 0,
+  staticComponents: new Set<string>(),
+};
+
 /**
  * Constant for styles to be globally applied to `slot-fb` elements for pseudo-slot behavior.
  *

src/runtime/vdom/vdom-annotations.ts

@@ -3,11 +3,13 @@ import { getHostRef } from '@platform';
 import type * as d from '../../declarations';
 import {
   CONTENT_REF_ID,
+  DEFAULT_DOC_DATA,
   HYDRATE_CHILD_ID,
   HYDRATE_ID,
   NODE_TYPE,
   ORG_LOCATION_ID,
   SLOT_NODE_ID,
+  STENCIL_DOC_DATA,
   TEXT_NODE_ID,
 } from '../runtime-constants';
 import { insertBefore } from './vdom-render';
@@ -23,11 +25,12 @@ import { insertBefore } from './vdom-render';
  */
 export const insertVdomAnnotations = (doc: Document, staticComponents: string[]) => {
   if (doc != null) {
-    const docData: DocData = {
-      hostIds: 0,
-      rootLevelIds: 0,
-      staticComponents: new Set(staticComponents),
-    };
+    /**
+     * Initiated `docData` object from the document if it exists to ensure we
+     * maintain the same `docData` object across multiple hydration hydration runs.
+     */
+    const docData: d.DocData = STENCIL_DOC_DATA in doc ? (doc[STENCIL_DOC_DATA] as d.DocData) : { ...DEFAULT_DOC_DATA };
+    docData.staticComponents = new Set(staticComponents);
     const orgLocationNodes: d.RenderNode[] = [];
 
     parseVNodeAnnotations(doc, doc.body, docData, orgLocationNodes);
@@ -99,7 +102,7 @@ export const insertVdomAnnotations = (doc: Document, staticComponents: string[])
 const parseVNodeAnnotations = (
   doc: Document,
   node: d.RenderNode,
-  docData: DocData,
+  docData: d.DocData,
   orgLocationNodes: d.RenderNode[],
 ) => {
   if (node == null) {
@@ -145,7 +148,7 @@ const insertVNodeAnnotations = (
   doc: Document,
   hostElm: d.HostElement,
   vnode: d.VNode | undefined,
-  docData: DocData,
+  docData: d.DocData,
   cmpData: CmpData,
 ) => {
   if (vnode != null) {
@@ -245,12 +248,6 @@ const insertChildVNodeAnnotations = (
   }
 };
 
-interface DocData {
-  hostIds: number;
-  rootLevelIds: number;
-  staticComponents: Set<string>;
-}
-
 interface CmpData {
   nodeIds: number;
 }

test/end-to-end/src/declarative-shadow-dom/__snapshots__/test.e2e.ts.snap

@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`renderToString can render a scoped component within a shadow component 1`] = `"<car-list cars=\\"[{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Vento&quot;,&quot;year&quot;:2024},{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Beetle&quot;,&quot;year&quot;:2023}]\\" custom-hydrate-flag=\\"\\" s-id=\\"1\\"><template shadowrootmode=\\"open\\"><style>:host{display:block;margin:10px;padding:10px;border:1px solid blue}ul{display:block;margin:0;padding:0}li{list-style:none;margin:0;padding:20px}.selected{font-weight:bold;background:rgb(255, 255, 210)}</style><ul c-id=\\"1.0.0.0\\"><li c-id=\\"1.1.1.0\\"><car-detail custom-hydrate-flag=\\"\\" c-id=\\"1.2.2.0\\" s-id=\\"2\\"><!--r.2--><section c-id=\\"2.0.0.0\\"><!--t.2.1.1.0-->2024 VW Vento</section></car-detail></li><li c-id=\\"1.3.1.1\\"><car-detail custom-hydrate-flag=\\"\\" c-id=\\"1.4.2.0\\" s-id=\\"3\\"><!--r.3--><section c-id=\\"3.0.0.0\\"><!--t.3.1.1.0-->2023 VW Beetle</section></car-detail></li></ul></template><!--r.1--></car-list>"`;
+exports[`renderToString can render a scoped component within a shadow component 1`] = `"<car-list cars=\\"[{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Vento&quot;,&quot;year&quot;:2024},{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Beetle&quot;,&quot;year&quot;:2023}]\\" custom-hydrate-flag=\\"\\" s-id=\\"9\\"><template shadowrootmode=\\"open\\"><style>:host{display:block;margin:10px;padding:10px;border:1px solid blue}ul{display:block;margin:0;padding:0}li{list-style:none;margin:0;padding:20px}.selected{font-weight:bold;background:rgb(255, 255, 210)}</style><ul c-id=\\"9.0.0.0\\"><li c-id=\\"9.1.1.0\\"><car-detail custom-hydrate-flag=\\"\\" c-id=\\"9.2.2.0\\" s-id=\\"10\\"><!--r.10--><section c-id=\\"10.0.0.0\\"><!--t.10.1.1.0-->2024 VW Vento</section></car-detail></li><li c-id=\\"9.3.1.1\\"><car-detail custom-hydrate-flag=\\"\\" c-id=\\"9.4.2.0\\" s-id=\\"11\\"><!--r.11--><section c-id=\\"11.0.0.0\\"><!--t.11.1.1.0-->2023 VW Beetle</section></car-detail></li></ul></template><!--r.9--></car-list>"`;
 
 exports[`renderToString can render a simple shadow component 1`] = `
 "<another-car-detail custom-hydrate-flag=\\"\\" s-id=\\"1\\">
@@ -14,72 +14,72 @@ exports[`renderToString can render a simple shadow component 1`] = `
 `;
 
 exports[`renderToString can render nested components 1`] = `
-"<another-car-list cars=\\"[{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Vento&quot;,&quot;year&quot;:2024},{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Beetle&quot;,&quot;year&quot;:2023}]\\" custom-hydrate-flag=\\"\\" s-id=\\"1\\">
+"<another-car-list cars=\\"[{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Vento&quot;,&quot;year&quot;:2024},{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Beetle&quot;,&quot;year&quot;:2023}]\\" custom-hydrate-flag=\\"\\" s-id=\\"6\\">
   <template shadowrootmode=\\"open\\">
     <style>
       :host{display:block;margin:10px;padding:10px;border:1px solid blue}ul{display:block;margin:0;padding:0}li{list-style:none;margin:0;padding:20px}.selected{font-weight:bold;background:rgb(255, 255, 210)}
     </style>
-    <ul c-id=\\"1.0.0.0\\">
-      <li c-id=\\"1.1.1.0\\">
-        <another-car-detail c-id=\\"1.2.2.0\\" custom-hydrate-flag=\\"\\" s-id=\\"2\\">
+    <ul c-id=\\"6.0.0.0\\">
+      <li c-id=\\"6.1.1.0\\">
+        <another-car-detail c-id=\\"6.2.2.0\\" custom-hydrate-flag=\\"\\" s-id=\\"7\\">
           <template shadowrootmode=\\"open\\">
             <style>
               section{color:green}
             </style>
-            <section c-id=\\"2.0.0.0\\">
-              <!--t.2.1.1.0-->
+            <section c-id=\\"7.0.0.0\\">
+              <!--t.7.1.1.0-->
               2024 VW Vento
             </section>
           </template>
-          <!--r.2-->
+          <!--r.7-->
         </another-car-detail>
       </li>
-      <li c-id=\\"1.3.1.1\\">
-        <another-car-detail c-id=\\"1.4.2.0\\" custom-hydrate-flag=\\"\\" s-id=\\"3\\">
+      <li c-id=\\"6.3.1.1\\">
+        <another-car-detail c-id=\\"6.4.2.0\\" custom-hydrate-flag=\\"\\" s-id=\\"8\\">
           <template shadowrootmode=\\"open\\">
             <style>
               section{color:green}
             </style>
-            <section c-id=\\"3.0.0.0\\">
-              <!--t.3.1.1.0-->
+            <section c-id=\\"8.0.0.0\\">
+              <!--t.8.1.1.0-->
               2023 VW Beetle
             </section>
           </template>
-          <!--r.3-->
+          <!--r.8-->
         </another-car-detail>
       </li>
     </ul>
   </template>
-  <!--r.1-->
+  <!--r.6-->
 </another-car-list>"
 `;
 
 exports[`renderToString supports passing props to components 1`] = `
-"<another-car-detail car=\\"{&quot;year&quot;:2024, &quot;make&quot;: &quot;VW&quot;, &quot;model&quot;: &quot;Vento&quot;}\\" custom-hydrate-flag=\\"\\" s-id=\\"1\\">
+"<another-car-detail car=\\"{&quot;year&quot;:2024, &quot;make&quot;: &quot;VW&quot;, &quot;model&quot;: &quot;Vento&quot;}\\" custom-hydrate-flag=\\"\\" s-id=\\"2\\">
   <template shadowrootmode=\\"open\\">
     <style>
       section{color:green}
     </style>
-    <section c-id=\\"1.0.0.0\\">
-      <!--t.1.1.1.0-->
+    <section c-id=\\"2.0.0.0\\">
+      <!--t.2.1.1.0-->
       2024 VW Vento
     </section>
   </template>
-  <!--r.1-->
+  <!--r.2-->
 </another-car-detail>"
 `;
 
 exports[`renderToString supports passing props to components with a simple object 1`] = `
-"<another-car-detail car=\\"{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Vento&quot;,&quot;year&quot;:2024}\\" custom-hydrate-flag=\\"\\" s-id=\\"1\\">
+"<another-car-detail car=\\"{&quot;make&quot;:&quot;VW&quot;,&quot;model&quot;:&quot;Vento&quot;,&quot;year&quot;:2024}\\" custom-hydrate-flag=\\"\\" s-id=\\"3\\">
   <template shadowrootmode=\\"open\\">
     <style>
       section{color:green}
     </style>
-    <section c-id=\\"1.0.0.0\\">
-      <!--t.1.1.1.0-->
+    <section c-id=\\"3.0.0.0\\">
+      <!--t.3.1.1.0-->
       2024 VW Vento
     </section>
   </template>
-  <!--r.1-->
+  <!--r.3-->
 </another-car-detail>"
 `;

test/end-to-end/src/declarative-shadow-dom/test.e2e.ts

@@ -105,7 +105,7 @@ describe('renderToString', () => {
         fullDocument: false,
       },
     );
-    expect(html).toContain('<section c-id="1.0.0.0"><!--t.1.1.1.0--> </section>');
+    expect(html).toContain('<section c-id="4.0.0.0"><!--t.4.1.1.0--> </section>');
   });
 
   it('supports styles for DSD', async () => {
@@ -145,31 +145,35 @@ describe('renderToString', () => {
     });
     expect(html).toMatchSnapshot();
     expect(html).toContain(
-      `<car-detail custom-hydrate-flag=\"\" c-id=\"1.2.2.0\" s-id=\"2\"><!--r.2--><section c-id=\"2.0.0.0\"><!--t.2.1.1.0-->2024 VW Vento</section></car-detail>`,
+      `<car-detail custom-hydrate-flag=\"\" c-id=\"9.2.2.0\" s-id=\"10\"><!--r.10--><section c-id=\"10.0.0.0\"><!--t.10.1.1.0-->2024 VW Vento</section></car-detail>`,
     );
     expect(html).toContain(
-      `<car-detail custom-hydrate-flag=\"\" c-id=\"1.4.2.0\" s-id=\"3\"><!--r.3--><section c-id=\"3.0.0.0\"><!--t.3.1.1.0-->2023 VW Beetle</section></car-detail>`,
+      `<car-detail custom-hydrate-flag=\"\" c-id=\"9.4.2.0\" s-id=\"11\"><!--r.11--><section c-id=\"11.0.0.0\"><!--t.11.1.1.0-->2023 VW Beetle</section></car-detail>`,
     );
   });
 
   it('can render a scoped component within a shadow component (sync)', async () => {
     const input = `<car-list cars=${JSON.stringify([vento, beetle])}></car-list>`;
-    const expectedResults = [
-      '<car-detail custom-hydrate-flag="" c-id="1.2.2.0" s-id="2"><!--r.2--><section c-id="2.0.0.0"><!--t.2.1.1.0-->2024 VW Vento</section></car-detail>',
-      '<car-detail custom-hydrate-flag="" c-id="1.4.2.0" s-id="3"><!--r.3--><section c-id="3.0.0.0"><!--t.3.1.1.0-->2023 VW Beetle</section></car-detail>',
-    ] as const;
     const opts = {
       serializeShadowRoot: true,
       fullDocument: false,
     };
 
     const resultRenderToString = await readableToString(renderToString(input, opts, true));
-    expect(resultRenderToString).toContain(expectedResults[0]);
-    expect(resultRenderToString).toContain(expectedResults[1]);
+    expect(resultRenderToString).toContain(
+      '<car-detail custom-hydrate-flag=\"\" c-id=\"12.2.2.0\" s-id=\"13\"><!--r.13--><section c-id=\"13.0.0.0\"><!--t.13.1.1.0-->2024 VW Vento</section></car-detail>'
+    );
+    expect(resultRenderToString).toContain(
+      '<car-detail custom-hydrate-flag=\"\" c-id=\"12.4.2.0\" s-id=\"14\"><!--r.14--><section c-id=\"14.0.0.0\"><!--t.14.1.1.0-->2023 VW Beetle</section></car-detail>'
+    );
 
     const resultStreamToString = await readableToString(streamToString(input, opts));
-    expect(resultStreamToString).toContain(expectedResults[0]);
-    expect(resultStreamToString).toContain(expectedResults[1]);
+    expect(resultStreamToString).toContain(
+      '<car-detail custom-hydrate-flag=\"\" c-id=\"15.2.2.0\" s-id=\"16\"><!--r.16--><section c-id=\"16.0.0.0\"><!--t.16.1.1.0-->2024 VW Vento</section></car-detail>'
+    );
+    expect(resultStreamToString).toContain(
+      '<car-detail custom-hydrate-flag=\"\" c-id=\"15.4.2.0\" s-id=\"17\"><!--r.17--><section c-id=\"17.0.0.0\"><!--t.17.1.1.0-->2023 VW Beetle</section></car-detail>'
+    );
   });
 
   it('can take over a server side rendered component and re-render it in the browser', async () => {
@@ -238,7 +242,7 @@ describe('renderToString', () => {
      * ```
      */
     expect(html).toContain(
-      `<dsd-listen-cmp custom-hydrate-flag=\"\" s-id=\"1\"><template shadowrootmode=\"open\"><style>:host{display:block}</style><slot c-id=\"1.0.0.0\"></slot></template><!--r.1-->Hello World</dsd-listen-cmp>`,
+      `<dsd-listen-cmp custom-hydrate-flag=\"\" s-id=\"21\"><template shadowrootmode=\"open\"><style>:host{display:block}</style><slot c-id=\"21.0.0.0\"></slot></template><!--r.21-->Hello World</dsd-listen-cmp>`,
     );
 
     /**
@@ -253,7 +257,7 @@ describe('renderToString', () => {
      * </car-detail>
      */
     expect(html).toContain(
-      `<car-detail custom-hydrate-flag=\"\" c-id=\"2.4.2.0\" s-id=\"4\"><!--r.4--><section c-id=\"4.0.0.0\"><!--t.4.1.1.0-->2023 VW Beetle</section></car-detail>`,
+      `<car-detail custom-hydrate-flag=\"\" c-id=\"22.4.2.0\" s-id=\"24\"><!--r.24--><section c-id=\"24.0.0.0\"><!--t.24.1.1.0-->2023 VW Beetle</section></car-detail>`,
     );
 
     const page = await newE2EPage({ html, url: 'https://stencil.com' });
@@ -280,15 +284,15 @@ describe('renderToString', () => {
       serializeShadowRoot: false,
       fullDocument: false,
     });
-    expect(html).toBe('<another-car-detail custom-hydrate-flag="" s-id="1"><!--r.1--></another-car-detail>');
+    expect(html).toBe('<another-car-detail custom-hydrate-flag="" s-id="25"><!--r.25--></another-car-detail>');
   });
 
   it('does not render a shadow component but its light dom', async () => {
     const { html } = await renderToString('<cmp-with-slot>Hello World</cmp-with-slot>', {
       serializeShadowRoot: false,
       fullDocument: false,
     });
-    expect(html).toBe('<cmp-with-slot custom-hydrate-flag="" s-id="1"><!--r.1-->Hello World</cmp-with-slot>');
+    expect(html).toBe('<cmp-with-slot custom-hydrate-flag="" s-id="26"><!--r.26-->Hello World</cmp-with-slot>');
   });
 
   describe('modes in declarative shadow dom', () => {
@@ -340,20 +344,20 @@ describe('renderToString', () => {
         prettyHtml: true,
       },
     );
-    expect(html).toBe(`<nested-cmp-parent custom-hydrate-flag="" s-id="1">
+    expect(html).toBe(`<nested-cmp-parent custom-hydrate-flag="" s-id="29">
   <template shadowrootmode="open">
-    <div c-id="1.0.0.0" class="some-class">
-      <slot c-id="1.1.1.0"></slot>
+    <div c-id="29.0.0.0" class="some-class">
+      <slot c-id="29.1.1.0"></slot>
     </div>
   </template>
-  <!--r.1-->
-  <nested-cmp-child custom-hydrate-flag="" s-id="2">
+  <!--r.29-->
+  <nested-cmp-child custom-hydrate-flag="" s-id="30">
     <template shadowrootmode="open">
-      <div c-id="2.0.0.0" class="some-other-class">
-        <slot c-id="2.1.1.0"></slot>
+      <div c-id="30.0.0.0" class="some-other-class">
+        <slot c-id="30.1.1.0"></slot>
       </div>
     </template>
-    <!--r.2-->
+    <!--r.30-->
     Hello World
   </nested-cmp-child>
 </nested-cmp-parent>`);