Continued problems with issue #103 ('import' and 'export' may appear only with 'sourceType: module')

[Carl Gross]

Hello. This is a follow up to an existing (but closed) issue (#103). I am having the same issue. I've tried the suggestions in #103, but still cannot resolve the issue (see below). Are the solutions in that issue still relevant, or have they become obsolete?

In my case, the Browserify command is:

node_modules/.bin/browserify www/js/functions.js test/tape.test.js -t [ babelify ] --outfile test/test-bundle.js

It is failing with the error:

SyntaxError: 'import' and 'export' may appear only with 'sourceType: module' (4819:0) while parsing C:\Users\snarl\Orbis\osatest\node_modules\fetch-mock\esm\client.js while parsing file: C:\Users\snarl\Orbis\osatest\node_modules\fetch-mock\esm\client.js

---

My Attempts To Resolve

--From #103, I tried installing the package babel-preset-es2015 then running the command:

node_modules/.bin/browserify www/js/functions.js test/tape.test.js -t [ babelify --presets [ es2015 ] ] --outfile test/test-bundle.js

The previous error was gone, but it failed with a new error:

Error: Plugin/Preset files are not allowed to export objects, only functions. In C:\Users\snarl\Orbis\osatest\node_modules\babel-preset-es2015\lib\index.js while parsing file: C:\Users\snarl\Orbis\osatest\test\tape.test.js

A few Stack Overflow posts (example) seemed to indicate that this was because I was using babel-preset-es2015, and had to eschew it in favor of a different package; @babel/preset-env I've removed the old package, and installed the new package. But the Browserify command is back to failing with the original import/export error.

--With @babel/preset-env installed, I tried three different configurations in my project's babel.config.js file (see pastebin here), but none had any effect on the issue. Those suggestions were taken from the @babel/preset-env page.

--With @babel/preset-env installed, I tried using the following command from the command line, but there was no change in the result.

node_modules/.bin/browserify www/js/functions.js test/tape.test.js -t [ babelify --presets [ es2015 ] ] --outfile test/test-bundle.js

--To see the code in each of my JS files, please see this pastebin.

---

FYI I am using Browserify v16.5.1 and Babelify v10.0.0.

Thanks in advance.

[Nicolas Hili]

Hello,

I just ran into the same issue and tried all the options above with no success. I really look forward to a solution.

My Browserify command:
browserify --debug index.js -o dist/bundle.js -s ns -t [ babelify --presets [ @babel/preset-env ] ]

The output:
export * from './src/test.js'; ^ ParseError: 'import' and 'export' may appear only with 'sourceType: module'

Browserify: v16.5.2
Babelify: v10.0.0

Nicolas

[Daniel]

Same problem, I tried Babel 7 and 6. After Pinia installation in my Vue project (without vue-cli) and adding import { createPinia, PiniaVuePlugin } from 'pinia'. When I'm removing this import line, everything works fine.

Error:

[...]/node_modules/@vue/devtools-api/lib/esm/index.js:1
import { getTarget, getDevtoolsGlobalHook, isProxyAvailable } from './env';
^
ParseError: 'import' and 'export' may appear only with 'sourceType: module'

Config:

  "browserify": {
    "transform": [
      [
        "babelify",
        {
          "global": true,
          "ignore": ["/^(?!.*\/node_modules\/app\/)/"],
          "presets": [
            "babel-preset-env",
            "babel-preset-es2015"
          ]
        }
      ]
    ]
  }

Build:
browserify src/main.js -o dist/js/app.js

[Arun Ganeshan]

Any update on this issue i am seeing the same when i a, trying to run karma with browserify with babelify

[Arun Ganeshan]

Did you try adding the extensions: ['.ts', '.js'] to babelify