ESLint is not a constructor

Question

I have made the porting to eslint-webpack-plugin and I am getting the error "ESLint is not a constructor", the relevant snippet code is:

const ESLintPlugin = require('eslint-webpack-plugin');

  const plugins = [
    new webpack.DefinePlugin(productionEnvironmentVariables),
    new ESLintPlugin({
      overrideConfigFile: path.resolve(configPath, '.eslintrc.json')
    })
  ];

Any idea what is wrong? I have tried also with new ESLintPlugin() and ESLintPlugin({}).

Webpack version is ^4.44.2 Eslint version is ^6.8.0 eslint-webpack-plugin is ^2.1.0

Thank you in advance and regards.

Probably because when I installed eslint-webpack-plugin I installed automatically the latest version of it and I did not update the rest of my packages, including Eslint. When you do that there are high chances there is gonna be incompatible versions between your dependencies if they depend on each other. — Javier Guzmán, Dec 22 '20 at 06:43
Did the same, now getting the following error: TypeError: Class constructor ESLintWebpackPlugin cannot be invoked without 'new'. Any clue? — Constantine Ch, Oct 27 '21 at 21:00

score 39 · Answer 1 · edited Aug 30 '22 at 10:42

39

You also need to install eslint >= 7 from npm, if you haven't already:

npm

npm i -D eslint@7.32.0

yarn

yarn add -D eslint@7.32.0

edited Aug 30 '22 at 10:42

Liran H

9,143
7
39
52

answered Dec 30 '20 at 07:58

hanyi tim

401
4
3

The command would be `npm i eslint@7.32.0` – Dan Rey Oquindo Jun 09 '22 at 15:54
5

`npm i eslint@latest` for last version – Eduardo Jiménez Jul 30 '22 at 02:00
1

Installing the latest eslint (v8) didn't fix the issue for me. v7.32.0 worked perfectly though. – Liran H Aug 30 '22 at 10:43

score 1 · Answer 2 · answered Dec 24 '22 at 15:57

1

I got this error while building vue app and had node > v18 .This worked for me eslint@7.32.0 .But not the latest eslint version installation.

answered Dec 24 '22 at 15:57

Dolly

11
1

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Dec 28 '22 at 01:40

L.cheng · Answer 3 · 2023-02-16T07:05:26.973

0

Just install eslint pack with the latest version, it work for me.

npm i eslint@latest -D

edited Feb 16 '23 at 07:05

answered Feb 16 '23 at 07:03

L.cheng

1
1

ESLint is not a constructor

3 Answers3

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