@wmde/eslint-config-wikimedia-typescript/typescript.js

ESLint config for TypeScript following Wikimedia code conventions.

module.exports = {
  "extends": [
    "plugin:@typescript-eslint/recommended"
  ],
  "plugins": [
    "@typescript-eslint"
  ],
  "parserOptions": {
    "parser": "@typescript-eslint/parser",
    "sourceType": "module",
    "ecmaFeatures": {
      "impliedStrict": true
    }
  },
  "rules": {
    // general remark: rules not in the TS namespace act in combination with their following line
    // align recommended w/ wikimedia style or escalating default warnings to errors
    "@typescript-eslint/array-type": [ "error", { "default": "array" } ],
    "@typescript-eslint/explicit-function-return-type": [ "error", {
      "allowExpressions": true,
      "allowTypedFunctionExpressions": true,
      "allowHigherOrderFunctions": true
    } ],
    "@typescript-eslint/explicit-module-boundary-types": ["error"],
    "@typescript-eslint/explicit-member-accessibility": [ "error", { "accessibility": "explicit" } ],
    // aligned to https://github.com/wikimedia/eslint-config-wikimedia/blob/master/common.json#L21
    "@typescript-eslint/indent": [ "error", "tab", { "SwitchCase": 1 } ],
    "@typescript-eslint/member-delimiter-style": "error",
    "no-empty-function": "off",
    "@typescript-eslint/no-empty-function": "error",
    "@typescript-eslint/no-empty-interface": [ "error", { "allowSingleExtends": true } ],
    "@typescript-eslint/no-this-alias": "error",
    // problematic in TypeScript / ES6
    "@typescript-eslint/no-unused-vars": [ "error", { "argsIgnorePattern": "^_" } ],
    "@typescript-eslint/no-useless-constructor": "error",
    "@typescript-eslint/prefer-function-type": "error",
    "@typescript-eslint/type-annotation-spacing": [ "error", {
      "before": false,
      "after": true,
      "overrides": {
        "arrow": {
          "before": true,
          "after": true
        },
        "colon": {
          "before": false,
          "after": true
        }
      }
    } ],
    "@typescript-eslint/unified-signatures": "error",
    "semi": "off",
    "@typescript-eslint/semi": [ "error", "always" ]
  }
}