TypeError: Merging undefined is not supported

Question

I got this error when running $ quasar dev on my Vue project

~/project/node_modules/webpack-merge/dist/index.js:63
            throw new TypeError("Merging undefined is not supported");
                  ^

[  TypeError: Merging undefined is not supported

  - index.js:63 mergeWithOptions
    [project]/[webpack-merge]/dist/index.js:63:19

  - index.js:52 merge
    [project]/[webpack-merge]/dist/index.js:52:35

  - quasar-conf-file.js:392 QuasarConfFile.compile
    [project]/[@quasar]/app/lib/quasar-conf-file.js:392:29

  - task_queues:96 processTicksAndRejections
    node:internal/process/task_queues:96:5

  - quasar-dev:237 async goLive
    [project]/[@quasar]/app/bin/quasar-dev:237:3

]

Answer 1

So the issue is the wrong quasar version.

My dependencies are

"dependencies": {
  "quasar": "^1.0.0",
  ...
},
"devDependencies": {
  "@quasar/app": "^2.0.0",

But when I ran npm install, it asked me to ran npm audit fix --force and it would change the @quasar/app version. You would need to reset the package.json and run npm install again to fix it.

14 vulnerabilities (7 moderate, 7 high)

To address issues that do not require attention, run:
  npm audit fix

To address all issues (including breaking changes), run:
  npm audit fix --force