NPM and Eslint: This is confusing, is that normal?

Question

I am new to JS and I am trying to learn about linting. So, I am following a tutorial where we set the lint stage in the package.json file.

It looks like this: "lint": "./node_modules/.bin/eslint ."

So in the terminal, when I run ./node_modules/.bin/eslint . it is reporting back all the errors and warnings which is nice, as expected.

/Users/me/dev/webapps/templates/sample_node_project/index.js
  1:1   error    Expected 1 empty line after require statement not followed by another require  import/newline-after-import
  1:35  error    Missing semicolon                                                              semi
  5:27  error    Missing semicolon                                                              semi
  9:3   warning  Unexpected console statement                                                   no-console
  9:53  error    Missing semicolon                                                              semi

✖ 5 problems (4 errors, 1 warning)
  4 errors and 0 warnings potentially fixable with the `--fix` option.

But when I run npm run lint , I am getting this:

/Users/me/dev/webapps/templates/sample_node_project/index.js
  1:1   error    Expected 1 empty line after require statement not followed by another require  import/newline-after-import
  1:35  error    Missing semicolon                                                              semi
  5:27  error    Missing semicolon                                                              semi
  9:3   warning  Unexpected console statement                                                   no-console
  9:53  error    Missing semicolon                                                              semi

✖ 5 problems (4 errors, 1 warning)
  4 errors and 0 warnings potentially fixable with the `--fix` option.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! sample_node_project@1.0.0 lint: `eslint .`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the sample_node_project@1.0.0 lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/me/.npm/_logs/2018-10-25T23_15_56_180Z-debug.log

So this throws an extra block of errors, which made me think that my node and npm is corrupt. Also, in the tutorial, the instructor is running yarn lint and he seems to be getting a lot less of that additional error block.

Is that normal?

Answer 1

npm run lint -s will suppress the NPM error that you are seeing. ESLint gives you a non-zero exit code because of the lint errors. NPM is basically saying that it can't run correctly because of the linting errors. So yes, it's normal.