Describe the Bug

Hi,

I am currently working on upgrading an Angular 16 application to Angular 17 and I would like to use esbuild.
My application requires index.html transformation. This transformation relies on data from the targetOptions parameter.

With version 16, I was using @angular-builders/custom-webpack and it was working fine.
Unfortunately, with @angular-builders/custom-esbuild, the targetOptions are not present during the transformation. Instead, it's the content of the index file.
Yet the documentation indicates that targetOptions should be accessible.

Minimal Reproduction

Just creating a new Angular 17 application (via ng new), and following the instruction of the doc :

• Adding @angular-builders/custom-esbuild as a dev dependency
• Replacing @angular-devkit/build-angular:application with @angular-builders/custom-esbuild:application and @angular-devkit/build-angular:dev-server with @angular-builders/custom-esbuild:dev-server in angular.json
• Adding index-html-transformer.ts with the following code :

import { Target } from '@angular-devkit/architect/src/input-schema'; import { json } from '@angular-devkit/core'; type TargetOptions = json.JsonObject & Target; export default (targetOptions: TargetOptions, indexHtml: string) => { console.log('targetOptions', targetOptions); const i = indexHtml.indexOf('</body>'); const config = `<p>Configuration: ${targetOptions.configuration}</p>`; return `${indexHtml.slice(0, i)} ${config} ${indexHtml.slice(i)}`; }; 

• Adding indexHtmlTransformer in angular.json

Here is the result on ng build / ng serve :

Expected Behavior

TargetOptions should be there. Or at least, documentation needs an update.

Environment

 Libs - @angular/core version: 17.2.0 - @angular-devkit/build-angular version: 17.2.1 - @angular-builders/custom-esbuild: 17.1.0 For Tooling issues: - Node version: 20.11.1 - Platform: Windows