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Commiteb2c4c9

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refactor(devtools): simular transfer cache data in the devtools demo app.
With the commit we mimic server-side behavior and serialize a bunch of transfer cache data.fixes#62664
1 parent527bd77 commiteb2c4c9

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3 files changed

+51
-1
lines changed

3 files changed

+51
-1
lines changed

‎devtools/src/app/BUILD.bazel

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@@ -12,6 +12,7 @@ ng_project(
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srcs= [
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"app.component.ts",
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"app.config.ts",
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"transfer-state.ts",
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],
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angular_assets= [
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"app.component.html",

‎devtools/src/app/app.config.ts

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@@ -6,17 +6,20 @@
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* found in the LICENSE file at https://angular.dev/license
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*/
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import{ApplicationConfig}from'@angular/core';
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import{ApplicationConfig,provideAppInitializer}from'@angular/core';
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import{provideAnimations}from'@angular/platform-browser/animations';
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import{provideRouter}from'@angular/router';
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import{ApplicationEnvironment,ApplicationOperations}from'../../projects/ng-devtools';
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import{DemoApplicationEnvironment}from'../demo-application-environment';
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import{DemoApplicationOperations}from'../demo-application-operations';
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import{serializeTransferState}from'./transfer-state';
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import{provideHttpClient,ɵwithHttpTransferCache}from'@angular/common/http';
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exportconstappConfig:ApplicationConfig={
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providers:[
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provideAnimations(),
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provideHttpClient(),
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provideRouter([
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{
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path:'',
@@ -37,5 +40,9 @@ export const appConfig: ApplicationConfig = {
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provide:ApplicationEnvironment,
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useClass:DemoApplicationEnvironment,
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},
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// We simulate a transfer state created by the server-side rendering.
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// We use the privately exported interceptor to cache HTTP requests.
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ɵwithHttpTransferCache({}),
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provideAppInitializer(async()=>serializeTransferState()),
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],
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};

‎devtools/src/app/transfer-state.ts

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import{HttpClient}from'@angular/common/http';
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import{APP_ID,DOCUMENT,inject,makeStateKey,TransferState}from'@angular/core';
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import{firstValueFrom}from'rxjs';
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/**
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* This function serializes the transfer state into the DOM.
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*/
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exportasyncfunctionserializeTransferState():Promise<void>{
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constdoc=inject(DOCUMENT);
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constappId=inject(APP_ID);
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consttransferState=inject(TransferState);
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consthttpClient=inject(HttpClient);
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// Object
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constObjkey=makeStateKey<any>('obj');
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transferState.set(Objkey,{
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appName:'DevTools',
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appVersion:'0.0.1',
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appDescription:'Angular DevTools',
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});
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// Array
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constarraykey=makeStateKey<any>('arr');
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transferState.set(arraykey,[1,2,3,4,5]);
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// Cached request
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// We're tweaking the transferCache interceptor to believe we're server side
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globalThis.ngServerMode=true;
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awaitfirstValueFrom(httpClient.get('https://swapi.info/api/people/1'));
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globalThis.ngServerMode=false;
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// We're back to normal
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// Serialized of the TransferState into the DOM.
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constcontent=transferState.toJson();
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constscript=doc.createElement('script');
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script.textContent=content;
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script.id=appId+'-state';
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script.setAttribute('type','application/json');
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doc.body.appendChild(script);
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}

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