.eslintrc.js

module.exports = {
  root: true,
  env: {
    browser: true,
    node: true
  },
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint'],
  extends: [
    'plugin:@typescript-eslint/recommended',
    'prettier/@typescript-eslint', // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
    'plugin:prettier/recommended' // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
  ],
  rules: {
    'no-var': 'error',
    '@typescript-eslint/no-var-requires': 'off',
    'prettier/prettier': [
      'error',
      {
        semi: false,
        singleQuote: true,
        printWidth: 120,
        htmlWhitespaceSensitivity: 'ignore',
        endOfLine: 'auto',
        trailingComma: 'none'
      }
    ],
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/no-explicit-any': 'off'
  },
  overrides: [
    {
      // enable the rule specifically for TypeScript files
      files: ['*.ts'],
      rules: {
        '@typescript-eslint/explicit-function-return-type': ['error']
      }
    }
  ]
}