.eslintrc.json

{
   "env": {
      "es2021": true,
      "node": true
   },
   "extends": [
      "eslint:recommended",
      "plugin:@typescript-eslint/recommended"
   ],
   "parser": "@typescript-eslint/parser",
   "parserOptions": {
      "ecmaFeatures": {
         "jsx": true
      },
      "ecmaVersion": "latest",
      "sourceType": "module"
   },
   "plugins": [
      "@typescript-eslint"
   ],
   "ignorePatterns": [
      "dist/",
      "rollup.config.ts"
   ],
   "rules": {
      /* Suggestions */
      "arrow-body-style": [
         "error",
         "as-needed"
      ],
      "camelcase": [
         "error",
         {}
      ],
      "curly": [
         "error",
         "multi-line"
      ],
      "eqeqeq": [
         "error",
         "always"
      ],
      "func-style": [
         "error",
         "declaration",
         {
            "allowArrowFunctions": true
         }
      ],
      "multiline-comment-style": [
         "error",
         "starred-block"
      ],
      "no-constant-condition": [
         "error",
         {
            "checkLoops": false
         }
      ],
      "no-empty-function": "error",
      "no-var": "error",
      "prefer-const": "error",
      "prefer-arrow-callback": "error",
      "semi-spacing": [
         "error",
         {
            "before": false,
            "after": true
         }
      ],
      "spaced-comment": [
         "error",
         "always"
      ],
      "prefer-template": "error",
      "sort-imports": [
         "error",
         {
            "allowSeparatedGroups": true
         }
      ],
      /* Layout & Formatting */
      "array-bracket-newline": [
         "error",
         {
            "multiline": true
         }
      ],
      "array-bracket-spacing": [
         "error",
         "never"
      ],
      "arrow-parens": [
         "error",
         "as-needed"
      ],
      "arrow-spacing": "error",
      "block-spacing": "error",
      "brace-style": "off",
      "comma-spacing": "off",
      "comma-dangle": "off",
      "eol-last": [
         "error",
         "always"
      ],
      "func-call-spacing": "off",
      "function-call-argument-newline": [
         "error",
         "consistent"
      ],
      "implicit-arrow-linebreak": [
         "error",
         "beside"
      ],
      "indent": [
         "error",
         2
      ],
      "key-spacing": "error",
      "keyword-spacing": "off",
      "lines-between-class-members": "off",
      "new-parens": "error",
      "newline-per-chained-call": [
         "error",
         {
            "ignoreChainWithDepth": 2
         }
      ],
      "no-array-constructor": "off",
      "no-dupe-class-members": "off",
      "no-duplicate-imports": "off",
      "no-extra-semi": "off",
      "no-multi-spaces": "error",
      "no-multiple-empty-lines": [
         "error",
         {
            "max": 2,
            "maxEOF": 0
         }
      ],
      "no-trailing-spaces": "error",
      "no-use-before-define": "off",
      "no-useless-constructor": "off",
      "no-whitespace-before-property": "error",
      "object-curly-spacing": "off",
      "object-property-newline": [
         "error",
         {
            "allowAllPropertiesOnSameLine": true
         }
      ],
      "prefer-rest-params": "off",
      "quotes": "off",
      "rest-spread-spacing": [
         "error",
         "never"
      ],
      "semi": "off",
      "space-before-blocks": "off",
      "space-before-function-paren": "off",
      "space-in-parens": [
         "error",
         "never"
      ],
      "space-infix-ops": "off",
      "template-curly-spacing": "error",
      /* Typescript */
      "@typescript-eslint/adjacent-overload-signatures": "error",
      "@typescript-eslint/array-type": [
         "error",
         {
            "default": "array"
         }
      ],
      "@typescript-eslint/ban-types": "off",
      "@typescript-eslint/brace-style": [
         "error"
      ],
      "@typescript-eslint/comma-dangle": [
         "error",
         {
            "arrays": "always-multiline",
            "objects": "always-multiline",
            "imports": "always-multiline",
            "exports": "always-multiline",
            "functions": "always-multiline",
            "enums": "always-multiline"
         }
      ],
      "@typescript-eslint/comma-spacing": [
         "error"
      ],
      "@typescript-eslint/explicit-function-return-type": [
         "error"
      ],
      "@typescript-eslint/func-call-spacing": [
         "error",
         "never"
      ],
      "@typescript-eslint/keyword-spacing": [
         "error"
      ],
      "@typescript-eslint/lines-between-class-members": [
         "error",
         "always"
      ],
      "@typescript-eslint/member-delimiter-style": [
         "error"
      ],
      "@typescript-eslint/method-signature-style": [
         "error",
         "property"
      ],
      "@typescript-eslint/naming-convention": [
         "error",
         {
            "selector": "default",
            "format": [
               "camelCase"
            ]
         },
         {
            "selector": "function",
            "format": [
               "camelCase"
            ]
         },
         {
            "selector": "variable",
            "format": [
               "camelCase",
               "PascalCase",
               "UPPER_CASE"
            ],
            "leadingUnderscore": "allowSingleOrDouble"
         },
         {
            "selector": "interface",
            "format": [
               "PascalCase"
            ]
         },
         {
            "selector": "enum",
            "format": [
               "PascalCase"
            ]
         },
         {
            "selector": "enumMember",
            "format": [
               "PascalCase"
            ]
         },
         {
            "selector": "property",
            "format": [
               "camelCase",
               "PascalCase",
               "snake_case",
               "UPPER_CASE"
            ],
            "leadingUnderscore": "allowSingleOrDouble"
         },
         {
            "selector": "typeAlias",
            "format": [
               "camelCase",
               "PascalCase"
            ]
         },
         {
            "selector": "parameter",
            "format": [
               "camelCase"
            ],
            "leadingUnderscore": "allow"
         }
      ],
      "@typescript-eslint/no-array-constructor": [
         "error"
      ],
      "@typescript-eslint/no-dupe-class-members": [
         "error"
      ],
      "@typescript-eslint/no-duplicate-imports": [
         "error"
      ],
      "@typescript-eslint/no-extra-semi": [
         "error"
      ],
      "@typescript-eslint/no-require-imports": [
         "error"
      ],
      "@typescript-eslint/no-use-before-define": [
         "error"
      ],
      "@typescript-eslint/no-useless-constructor": [
         "error"
      ],
      "@typescript-eslint/no-useless-empty-export": [
         "error"
      ],
      "@typescript-eslint/no-var-requires": "error",
      "@typescript-eslint/object-curly-spacing": [
         "error",
         "always"
      ],
      "@typescript-eslint/prefer-enum-initializers": [
         "error"
      ],
      "@typescript-eslint/prefer-optional-chain": [
         "error"
      ],
      "@typescript-eslint/quotes": [
         "error",
         "single",
         {
            "avoidEscape": true,
            "allowTemplateLiterals": true
         }
      ],
      "@typescript-eslint/semi": [
         "error",
         "always"
      ],
      "@typescript-eslint/space-before-blocks": [
         "error"
      ],
      "@typescript-eslint/space-before-function-paren": [
         "error",
         "never"
      ],
      "@typescript-eslint/space-infix-ops": [
         "error"
      ],
      "@typescript-eslint/type-annotation-spacing": [
         "error"
      ]
   }
}