Angular v19 prerender uses the wrong package.json

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#29,787 3 comments 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
38/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
angular, node.js, typescript
Domain
backend, build-system

Research direction

Start with the AngularNodeAppEngine entry point from @angular/ssr/node and the src/package.json imports shown in the report, then trace how angular.json invokes server output and prerendering through src/server.ts. Verify that resolution occurs from dist rather than src, and that the documented prerender: false setting prevents prerendering.

Written by the indexing model from the issue text.

Description

angular/build:application area: @angular/build area: @angular/ssr freq1: low type: bug/fix
Which @angular/* package(s) are the source of the bug?

ssr

Is this a regression?

No

Description

when running an angular app that uses AngularNodeAppEngine from "@angular/ssr/node" and outputMode set to server it reads imports from src/package.json which is set to be used in dist

package.json

"imports": {
    "#configs/*": "./browser/configs/*.js"
}

in the source code the configs folder is live in "src/configs" but copied at build time into "dist/browser/configs"
the same goes for many dynamic imports that assume the app runs inside the dist dir, i.e. the paths may be differ from the corresponding paths in the source code.

The prerender should run the same way as the original app runs i.e. from dist.

another thing, I cannot find an option to totally disable the prerendering as prerender: false now has no effect

Please provide the environment you discovered this bug in (run ng version)
Angular CLI: 19.2.1
Node: 22.12.0
Package Manager: npm 10.9.0
OS: linux x64

Angular: 19.2.1
... animations, build, cli, common, compiler, compiler-cli, core
... forms, platform-browser, platform-browser-dynamic
... platform-server, router, service-worker, ssr

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.1902.1
@angular-devkit/core         19.2.1
@angular-devkit/schematics   19.2.1
@angular/cdk                 19.2.2
@angular/material            19.2.2
@schematics/angular          19.2.1
rxjs                         7.8.2
typescript                   5.8.2
zone.js                      0.15.0
Anything else?

No response

angular.json 
{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "cms-ui": {
      "projectType": "application",
      "schematics": {
        "@schematics/angular:component": {
          "style": "scss"
        }
      },
      "root": "",
      "sourceRoot": "src",
      "prefix": "app",
      "architect": {
        "build": {
          "builder": "@angular/build:application",
          "options": {
            "outputPath": "dist",
            "index": "src/index.html",
            "browser": "src/main.ts",
            "polyfills": ["zone.js"],
            "tsConfig": "tsconfig.json",
            "inlineStyleLanguage": "scss",
            "assets": [
              "src/favicon.ico",
              "src/assets",
              "src/manifest.webmanifest",
              "src/scripts.mjs",
              "src/configs"
            ],
            "styles": ["src/styles.scss"],
            "scripts": [],
            "server": "src/main.server.ts",
            "outputMode": "server",
            "prerender": false,
            "ssr": {
              "entry": "src/server.ts"
            },
            "serviceWorker": "ngsw-config.json",
            "define": {},
            "namedChunks": true,
            "externalDependencies": ["#configs/*"]
          },
          "configurations": {
            "production": {
              "budgets": [
                {
                  "type": "initial",
                  "maximumWarning": "2m"
                },
                {
                  "type": "anyComponentStyle",
                  "maximumWarning": "2kb"
                }
              ],
              "outputHashing": "all"
            },
            "development": {
              "optimization": false,
              "extractLicenses": false,
              "sourceMap": true
            }
          },
          "defaultConfiguration": "production"
        },
        "serve": {
          "builder": "@angular/build:dev-server",
          "configurations": {
            "production": {
              "buildTarget": "cms-ui:build:production"
            },
            "development": {
              "buildTarget": "cms-ui:build:development"
            }
          },
          "defaultConfiguration": "development"
        },
        "extract-i18n": {
          "builder": "@angular/build:extract-i18n",
          "options": {
            "buildTarget": "cms-ui:build"
          }
        },
        "test": {
          "builder": "@angular/build:karma",
          "options": {
            "polyfills": ["zone.js", "zone.js/testing"],
            "tsConfig": "tsconfig.spec.json",
            "inlineStyleLanguage": "scss",
            "assets": [
              "src/favicon.ico",
              "src/assets",
              "src/manifest.webmanifest",
              "src/scripts.mjs",
              "src/configs"
            ],
            "styles": ["src/styles.scss"],
            "scripts": []
          }
        }
      }
    }
  },
  "cli": {
    "analytics": false
  }
}
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