.eslintrc.js

const { to_number } = require("svelte/internal");

module.exports = {
    env: {
        node: true,
        browser: true,
        es6: true,
    },
    extends: ['plugin:import/errors', 'plugin:import/warnings', 'plugin:import/typescript'],
    parser: '@typescript-eslint/parser',
    parserOptions: {
        project: 'tsconfig.json',
        extraFileExtensions: ['.json'],
        sourceType: 'module',
        tsconfigRootDir: __dirname,
    },
    plugins: ['@typescript-eslint', 'import'],
    rules: {
        'max-len': [1, 140, 2, { ignoreComments: true }],
        '@typescript-eslint/adjacent-overload-signatures': 'error',
        '@typescript-eslint/no-empty-function': 'error',
        '@typescript-eslint/no-empty-interface': 'warn',
        '@typescript-eslint/no-floating-promises': 'error',
        '@typescript-eslint/no-namespace': 'error',
        '@typescript-eslint/no-unnecessary-type-assertion': 'error',
        '@typescript-eslint/prefer-for-of': 'warn',
        '@typescript-eslint/triple-slash-reference': 'error',
        '@typescript-eslint/unified-signatures': 'warn',
        'comma-dangle': [
            'error',
            {
                arrays: 'only-multiline',
                objects: 'only-multiline',
                imports: 'only-multiline',
                exports: 'only-multiline',
                functions: 'ignore',
            },
        ],
        'constructor-super': 'error',
        eqeqeq: ['warn', 'always'],
        'import/no-deprecated': 'warn',
        'import/no-extraneous-dependencies': 'error',
        'import/no-unassigned-import': 'warn',
        'no-cond-assign': 'error',
        'no-duplicate-case': 'error',
        'no-duplicate-imports': 'error',
        'no-empty': [
            'error',
            {
                allowEmptyCatch: true,
            },
        ],
        // "no-invalid-this": "error",
        'no-new-wrappers': 'error',
        'no-param-reassign': 'error',
        'no-redeclare': 'error',
        'no-sequences': 'error',
        'no-shadow': [
            'error',
            {
                hoist: 'all',
            },
        ],
        'no-throw-literal': 'error',
        'no-unsafe-finally': 'error',
        'no-unused-labels': 'error',
        'no-unused-vars': 'off', // sometimes unused vars improve readability
        'no-var': 'warn',
        'no-void': 'error',
        'prefer-const': 'warn',
        // "no-loops/no-loops": "error",
        'import/no-extraneous-dependencies': [
            'error',
            {
                devDependencies: ['**/*.spec.js*'], // don't complain about test imports
            },
        ],
    },
    settings: {
        jsdoc: {
            tagNamePreference: {
                returns: 'return',
            },
        },
        'import/resolver': {
            node: {
                extensions: ['.js', '.jsx', '.ts', '.tsx'],
                moduleDirectory: ['node_modules', 'src/'],
            },
        },
    },
};