.eslintrc.json

{
    "env": {
        "es6": true,
        "browser": false,
        "node": true
    },
    "globals": {
        "Promise": true
    },
    "extends": ["plugin:@typescript-eslint/recommended", "airbnb", "prettier"],
    "plugins": [
        "chai-friendly",
        "jsdoc",
        "prettier",
        "unicorn",
        "@typescript-eslint"
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 2020
    },
    "settings": {
        "import/extensions": [".ts", ".tsx"],
        "import/parsers": {
            "@typescript-eslint/parser": [".ts", ".tsx"]
        },
        "import/resolver": {
            "node": {
                "extensions": [".js", ".ts", ".tsx"]
            }
        },
        "jsdoc": {
            "tagNamePreference": {
                "returns": "return"
            }
        }
    },
    "rules": {
        "@typescript-eslint/no-non-null-assertion": "error",
        "chai-friendly/no-unused-expressions": "error",
        "prettier/prettier": "error",

        "guard-for-in": "warn",
        "import/extensions": "warn",
        "import/no-extraneous-dependencies": [
            "error",
            {
                "devDependencies": [
                    "app.js",
                    "vite.config.ts",
                    "src/api.ts",
                    "src/app.ts",
                    "test/**/*.ts"
                ],
                "optionalDependencies": false,
                "peerDependencies": true
            }
        ],
        "import/no-unresolved": [
            "error",
            {
                "ignore": ["vitest/config", ".*?raw"]
            }
        ],
        "import/order": "warn",
        "import/prefer-default-export": "off",
        "no-param-reassign": "warn",
        "no-restricted-syntax": [
            "warn",
            "ForInStatement",
            "LabeledStatement",
            "WithStatement"
        ],
        "no-shadow": "warn",
        "no-underscore-dangle": "warn",
        "no-unused-expressions": "off",
        "no-use-before-define": [
            "warn",
            {
                "functions": false
            }
        ],
        "prefer-destructuring": "warn"
    },
    "overrides": [
        {
            "files": ["./.github/**/*.md", "./*.md"],
            "parser": "markdown-eslint-parser",
            "rules": {
                "prettier/prettier": ["error", { "parser": "markdown" }]
            }
        },

        {
            "files": ["./**/*.ts", "./demo/**/*.tsx"],
            "rules": {
                "consistent-return": "off",
                "no-useless-constructor": "off",
                "@typescript-eslint/no-useless-constructor": "error",
                "no-unused-vars": "off",
                "@typescript-eslint/no-unused-vars": [
                    "error",
                    {
                        "argsIgnorePattern": "^_",
                        "varsIgnorePattern": "^_"
                    }
                ],
                "no-dupe-class-members": "off",
                "@typescript-eslint/no-dupe-class-members": "error",
                "no-empty-function": "off",
                "@typescript-eslint/no-empty-function": "error",
                "no-undef": "off",
                "no-redeclare": "off",
                "@typescript-eslint/no-redeclare": "error",
                "import/no-unresolved": "off",

                "import/extensions": [
                    "error",
                    "ignorePackages",
                    {
                        "": "never",
                        "js": "never",
                        "jsx": "never",
                        "ts": "never",
                        "tsx": "never"
                    }
                ]
            }
        },

        {
            "env": {
                "browser": true,
                "node": false
            },
            "files": ["./demo/**/*"],
            "rules": {
                "react/destructuring-assignment": "off",
                "react/jsx-filename-extension": [
                    "error",
                    { "extensions": [".jsx", ".tsx"] }
                ],
                "react/no-unknown-property": "off",
                "react/react-in-jsx-scope": "off"
            }
        },

        {
            "files": ["./test/**/*.ts"],
            "rules": {
                "@typescript-eslint/no-unused-expressions": "off"
            }
        },

        {
            "files": ["./**/*.d.ts"],
            "rules": {
                "lines-between-class-members": "off",
                "no-unused-vars": "off"
            }
        },

        {
            "files": ["./test/**/*.ts"],
            "plugins": ["vitest"],
            "rules": {
                "@typescript-eslint/no-non-null-assertion": "off",
                "no-undef": "off"
            }
        }
    ]
}