Hi Teo, thank you for your answer.
After applying your suggestion / code,
there’s a different error:

Uncaught ReferenceError: exports is not defined
    at eval (webpack-internal:///./node_modules/p-iteration/lib/static-methods.js:20)
    at Module../node_modules/p-iteration/lib/static-methods.js (app.js:3913)
    at __webpack_require__ (app.js:768)
    at fn (app.js:131)
    at Module.eval (webpack-internal:///./node_modules/p-iteration/index.js:6)
    at eval (webpack-internal:///./node_modules/p-iteration/index.js:13)
    at Module../node_modules/p-iteration/index.js (app.js:3889)
    at __webpack_require__ (app.js:768)
    at fn (app.js:131)
    at eval (webpack-internal:///./src/plugins/p-iteration.js:2)

Hello,
I am using version 0.17,
Adding “transpileDependencies” , “quasar dev” causes error:

"export 'filter' was not found in 'p-iteration'

the code is here
Any help is really appreciated

Is it appropriate the transpile all dependencies under node_modules? If it’s, how to do it?

@jeffatpf Actually I still don’t know the right way to debug and find the corresponding dependencies.

Thank you, jeffatpf
After some struggles, it comes to a temporary workaround:

• quasar.conf.js

      transpileDependencies: [
        'vuex-persist',
        'webpack-dev-server',
        'ansi-strip'
      ],

• manually transpile the vendor file by another node - babel project with the 2 config
  package.json

{
  "name": "es6-es5",
  "version": "1.0.0",
  "description": "",
  "main": "vendor.37b91565.js",
  "scripts": {
    "build": "npx babel vendor.dee81ebe.js --out-file out/vendor.dee81ebe.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/cli": "^7.2.3",
    "@babel/core": "^7.3.3",
    "@babel/plugin-proposal-object-rest-spread": "^7.3.2",
    "@babel/preset-env": "^7.3.1"
  }
}

.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "ie": "9"
        }
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-object-rest-spread"
  ]
}

runnpm run build to transpile the vendor file

Thank you for your reply.
Need your help further.

My understanding is:
some dependencies are transpiled to the vendor js file, set those dependency names under the
quasar.conf.js > build > transpileDependencies will solve the problem.

If it’s correct, how to find those dependencies?

Hi,

After running “quasar build”, only js/vendor.a6f65168.js not transpile to ES5.
Here is my “.babelrc”:

{
  "presets": [
    [
      "@babel/preset-env"
    ],
    [
      "@babel/preset-stage-2"
    ]
  ],
  "plugins": [
    [
      "@babel/transform-runtime", {
        "helpers": false,
        "polyfill": false,
        "regenerator": true
      }
    ]
  ],
  "comments": false
}

Other js files which are already transpiled to ES5.

0047f503.d5bf05a4.js  1f31fd06.64fe1cd4.js  356b2fa4.ad5b4e97.js  4eda64bc.72c43d3f.js  63621713.90297aad.js  a72382ca.f3a1d888.js  e8e21c70.dc0ee236.js
01ec88ef.661605ff.js  30707848.8f2b92a4.js  46471b12.2124773a.js  50209ee6.92948ed2.js  a06b116c.1c4a9c4c.js  ade2b0ac.716ac4f3.js  runtime.3179d1de.js
08282c5b.7654f67d.js  35201f27.1af69858.js  4a3a12e7.7f8c4c2b.js  5a72a35a.4c2d7e49.js  a611788e.74ac81be.js  app.602888a3.js 

How to transpile the vendor file to ES5 as well?

Thank you