nx/packages/angular/docs/application-executor-examples.md

The @nx/angular:application executor is very similar to the @angular-devkit/build-angular:application builder provided by the Angular CLI. It builds an Angular application using esbuild with integrated SSR and prerendering capabilities.

In addition to the features provided by the Angular CLI builder, the @nx/angular:application executor also supports the following:

• Providing esbuild plugins
• Providing a function to transform the application's index.html file
• Incremental builds

Examples

{% tabs %} {% tab label="Providing esbuild plugins" %}

The executor accepts a plugins option that allows you to provide esbuild plugins that will be used when building your application. It allows providing a path to a plugin file or an object with a path and options property to provide options to the plugin.

{
  ...
  "targets": {
    "build": {
      "executor": "@nx/angular:application",
      "options": {
        ...
        "plugins": [
          "apps/my-app/plugins/plugin1.js",
          {
            "path": "apps/my-app/plugins/plugin2.js",
            "options": {
              "someOption": "some value"
            }
          }
        ]
      }
    }
    ...
  }
}

const plugin1 = {
  name: 'plugin1',
  setup(build) {
    const options = build.initialOptions;
    options.define.PLUGIN1_TEXT = '"Value was provided at build time"';
  },
};

module.exports = plugin1;

function plugin2({ someOption }) {
  return {
    name: 'plugin2',
    setup(build) {
      const options = build.initialOptions;
      options.define.PLUGIN2_TEXT = JSON.stringify(someOption);
    },
  };
}

module.exports = plugin2;

Additionally, we need to inform TypeScript of the defined variables to prevent type-checking errors during the build. We can achieve this by creating or updating a type definition file included in the TypeScript build process (e.g. src/types.d.ts) with the following content:

declare const PLUGIN1_TEXT: number;
declare const PLUGIN2_TEXT: string;

{% /tab %}

{% tab label="Transforming the 'index.html' file" %}

The executor accepts an indexHtmlTransformer option to provide a path to a file with a default export for a function that receives the application's index.html file contents and outputs the updated contents.

{
  ...
  "targets": {
    "build": {
      "executor": "@nx/angular:application",
      "options": {
        ...
        "indexHtmlTransformer": "apps/my-app/index-html.transformer.ts"
      }
    }
    ...
  }
}

export default function (indexContent: string) {
  return indexContent.replace(
    '<title>my-app</title>',
    '<title>my-app (transformed)</title>'
  );
}

{% /tab %} {% /tabs %}