.eslintrc.json

{
    "extends": ["eslint:recommended", "prettier", "next"],
    "plugins": [
        "@typescript-eslint/eslint-plugin",
        "prettier",
        "check-file",
        "import",
        "react"
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "project": "tsconfig.json",
        "sourceType": "module"
    },
    "ignorePatterns": ["tests", ".next", ".swc", "*.cjs", "*.mjs"],
    "env": {
        "browser": true,
        "es2024": true,
        "node": true,
        "jest": true
    },
    "rules": {
        // Core
        "no-var": "error",
        "no-unused-vars": ["warn", { "argsIgnorePattern": "^_" }],
        "prefer-const": "warn",
        "array-callback-return": "warn",
        "require-await": "warn",
        "implicit-arrow-linebreak": "warn",
        "padding-line-between-statements": [
            "warn",
            { "blankLine": "always", "prev": "block-like", "next": "*" },
            { "blankLine": "always", "prev": "block", "next": "*" },
            { "blankLine": "always", "prev": "*", "next": "try" },
            { "blankLine": "always", "prev": "*", "next": "return" },
            { "blankLine": "always", "prev": "*", "next": "export" }
        ],

        // TypeScript
        "@typescript-eslint/explicit-function-return-type": "error",
        "@typescript-eslint/return-await": ["error", "always"],
        "@typescript-eslint/typedef": [
            "warn",
            {
                "arrowParameter": true,
                "parameter": true,
                "variableDeclaration": true
            }
        ],
        "@typescript-eslint/naming-convention": [
            "warn",
            {
                "selector": "variableLike",
                "format": ["camelCase", "UPPER_CASE"]
            },
            {
                "selector": "parameter",
                "format": ["camelCase"],
                "leadingUnderscore": "allow"
            },
            {
                "selector": "function",
                "format": ["camelCase", "PascalCase"],
                "modifiers": ["exported"]
            },
            {
                "selector": "class",
                "format": ["PascalCase"],
                "modifiers": ["exported"]
            }
        ],
        "@typescript-eslint/no-explicit-any": "off",
        "@typescript-eslint/no-inferrable-types": "off",
        "@typescript-eslint/no-non-null-assertion": "off",

        // Prettier
        "prettier/prettier": "warn",

        // Check File
        "check-file/filename-blocklist": [
            "error",
            {
                "./src/**/*.js": "*.ts",
                "./src/**/*.jsx": "*.tsx"
            }
        ],
        "check-file/filename-naming-convention": [
            "warn",
            {
                "**/*.(ts|tsx)": "KEBAB_CASE"
            },
            {
                "ignoreMiddleExtensions": true
            }
        ],

        // Import
        "import/no-commonjs": "error",
        "import/no-named-as-default": "off",
        "import/no-anonymous-default-export": "off",
        "import/no-named-as-default-member": "off",
        "import/default": "off",

        // React
        "react/destructuring-assignment": [
            "error",
            "always",
            { "destructureInSignature": "always" }
        ],
        "react/function-component-definition": [
            "warn",
            {
                "namedComponents": "function-declaration"
            }
        ],
        "react/jsx-closing-bracket-location": [
            "warn",
            {
                "location": "tag-aligned"
            }
        ],
        "react/jsx-newline": ["warn", { "prevent": false }],
        "react/jsx-no-useless-fragment": "warn"
    }
}