Angular 8, I use and old webpack systen (back when there was no angular cli)

Question

I try to upgrade a old grunt webpack based builder (been using since Angular 2 to 7), but now with Angular 8, I cannot upgrade to Ivy.

I have only a cryptic error:

ERROR in bundle.4c959b202dbdca8012b0.js from UglifyJs
Unexpected token: keyword «const» [./node_modules/@angular/forms/__ivy_ngcc__/fesm5/forms.js:29,0][bundle.4c959b202dbdca8012b0.js:69647,0]

My tsconfig.aot.json looks like this:

{
  "compilerOptions": {
    "skipLibCheck": true,
    "outDir": "build/aot",
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "noImplicitAny": true,
    "suppressImplicitAnyIndexErrors": true,
    "lib": [
      "es5",
      "es6",
      "dom",
      "es2015.collection",
      "es2015.promise",
      "es2015.core",
      "es2016",
      "es2017"
    ]
  },
  "include": [
    "src/angular/**/*",
    "test/angular-webpack/**/*"
  ],
  "exclude": [
    "node_modules",
    "src/angular/bundle.ts",
    "test/angular-webpack/angular/bundle.ts",
    "test/angular-karma",
    "build/browser"
  ],
  "angularCompilerOptions": {
    "enableIvy": true,
    "annotationsAs": "decorators",
    "preserveWhitespaces": false
  }
}

Possible duplicate of [UglifyJS throws unexpected token: keyword (const) with node\_modules](https://stackoverflow.com/questions/47439067/uglifyjs-throws-unexpected-token-keyword-const-with-node-modules) — Sachila Ranawaka, May 29 '19 at 13:01
"i am not using uglifyjs at all" --- uhh clearly one of your packages is?? otherwise where is this uglifyjs error coming from?? — Cody Ｇ, May 29 '19 at 14:16
`ERROR in bundle.4c959b202dbdca8012b0.js from UglifyJs ....` <= That message clearly states that uglifyjs is throwing the error. — Igor, May 29 '19 at 14:24

score -1 · Answer 1 · answered May 29 '19 at 15:13

-1

actually, it was my problem, i switched to terser-webpack-plugin and now it works.

answered May 29 '19 at 15:13

Patrik Laszlo

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Angular 8, I use and old webpack systen (back when there was no angular cli)

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