@typescript-eslint/parser parserOptions.ecmaVersion ignored / not linting

Question

I configured ecmaVersion 6 for my test files but it does not lint features that are not available in ecma6. Rules are working fine.

.eslintrc.js

module.exports = {
    root: true,

    extends: ['airbnb-base', '.eslintrc.airbnbonlywarnings.js'],

    parser: '@typescript-eslint/parser',

    parserOptions: {
        ecmaVersion: 6,
        ecmaFeatures: {
            blockBindings: false,
            forOf: false
        },
        project: 'tsconfig.json',
        tsconfigRootDir: __dirname
    },

    plugins: ['@typescript-eslint'],

    env: {
        browser: true,
        jasmine: true,
        node: true,
        mocha: false,
        amd: true
    },

    overrides: [{
        files: ['**/e2e/**/*.ts', '**/e2e/**/*.js'],
        parserOptions: {
            ecmaVersion: 6,
            project: 'tsconfig.e2e.json'
        }
    }]
}

tsconfig.e2e.json

{
    "compilerOptions": {
        "rootDir": ".",
        "outDir": "build-e2e",
        "allowJs": true,
        "incremental": true,
        "moduleResolution": "node",
        "module": "commonjs",
        "target": "es6",
        "noEmitOnError": true,
        "strict": false,
        "typeRoots" :[
            "./@types",
            "./node_modules/@types"
        ],
        "removeComments": false,
        "sourceMap": false
    },
    "include": [
        "@types/**/*.d.ts",
        "test/protractor/**/*.ts",
        "test/protractor/**/*.js",
        "src/**/test/e2e/**/*.ts",
        "src/**/test/e2e/**/*.js",
        "grunt/users/**/fake.config.ts"
    ],
    "exclude":[
        "./node_modules",
        "./customer_bundles"
    ]
}

Example code:

const myObj = { a: 'somestring', b: 42, c: false };
const tmp = Object.values(object1);

Expected Result Because Object.values() is a feature introduced in ecma 2017 it should lint that line because I specified ecmaVersion 6 aka 2015

Actual Result It's not linting

Additional Info It's not linting in IntelliJ and also not via console. No errors in console. Upgraded @typescript-eslint/parser 2.25.0 to 4.1 but that didn't help.

Versions

@typescript-eslint/parser 2.25.0
TypeScript 3.9.2
ESLint 6.3.0
node 14.4.0

So what I'm doing wrong?

I didn't see "env" in your .eslint file. Check eslint.org/docs/user-guide/… — Dolly
– Dolly, Commented Sep 8, 2020 at 12:06
I thought it's not relevant for my use case, but it's in the code and I added it now above in the example. — GarfieldKlon
– GarfieldKlon, Commented Sep 8, 2020 at 13:29

i123 · Accepted Answer · 2021-07-08 12:36:30Z

1

You do not need to lint for features unavailable in ecma6 if you are using typescript (except for new regexp syntax), because typescript will transpile new features to ecma6.

You can use eslint-plugin-es, but only for regular expressions. Everything else gets transpiled.

answered Jul 8, 2021 at 12:36

i123

1011 silver badge6 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

GarfieldKlon · Accepted Answer · 2020-09-09 20:18:27Z

0

Ok, the ecmaVersion doesn't do much in combination with @typescript-eslint/parser according to the developer. I'm now using eslint-plugin-es to lint ecma features. That works as intended.

answered Sep 9, 2020 at 20:18

GarfieldKlon

12.3k7 gold badges33 silver badges36 bronze badges

Collectives™ on Stack Overflow

@typescript-eslint/parser parserOptions.ecmaVersion ignored / not linting

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related