@typescript-eslint/eslint-plugin

ESLint Plugin TypeScript

Installation

Make sure you have TypeScript and @typescript-eslint/parser installed, then install the plugin:

npm i @typescript-eslint/eslint-plugin --save-dev

It is important that you use the same version number for @typescript-eslint/parser and @typescript-eslint/eslint-plugin.

Note: If you installed ESLint globally (using the -g flag) then you must also install @typescript-eslint/eslint-plugin globally.

Usage

Add @typescript-eslint/parser to the parser field and @typescript-eslint to the plugins section of your .eslintrc configuration file:

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint"]
}

Then configure the rules you want to use under the rules section.

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint"],
  "rules": {
    "@typescript-eslint/rule-name": "error"
  }
}

You can also enable all the recommended rules at once. Add plugin:@typescript-eslint/recommended in extends:

{
  "extends": ["plugin:@typescript-eslint/recommended"]
}

Supported Rules

Key: :heavy_check_mark: = recommended, :wrench: = fixable

Name	Description	:heavy_check_mark:	:wrench:
@typescript-eslint/adjacent-overload-signatures	Require that member overloads be consecutive (adjacent-overload-signatures from TSLint)	:heavy_check_mark:
@typescript-eslint/array-type	Requires using either T[] or Array<T> for arrays (array-type from TSLint)	:heavy_check_mark:	:wrench:
@typescript-eslint/ban-types	Enforces that types will not to be used (ban-types from TSLint)	:heavy_check_mark:	:wrench:
@typescript-eslint/camelcase	Enforce camelCase naming convention	:heavy_check_mark:
@typescript-eslint/class-name-casing	Require PascalCased class and interface names (class-name from TSLint)	:heavy_check_mark:
@typescript-eslint/explicit-function-return-type	Require explicit return types on functions and class methods	:heavy_check_mark:
@typescript-eslint/explicit-member-accessibility	Require explicit accessibility modifiers on class properties and methods (member-access from TSLint)	:heavy_check_mark:
@typescript-eslint/generic-type-naming	Enforces naming of generic type variables
@typescript-eslint/indent	Enforce consistent indentation (indent from TSLint)	:heavy_check_mark:	:wrench:
@typescript-eslint/interface-name-prefix	Require that interface names be prefixed with I (interface-name from TSLint)	:heavy_check_mark:
@typescript-eslint/member-delimiter-style	Require a specific member delimiter style for interfaces and type literals	:heavy_check_mark:	:wrench:
@typescript-eslint/member-naming	Enforces naming conventions for class members by visibility.
@typescript-eslint/member-ordering	Require a consistent member declaration order (member-ordering from TSLint)
@typescript-eslint/no-angle-bracket-type-assertion	Enforces the use of as Type assertions instead of <Type> assertions (no-angle-bracket-type-assertion from TSLint)	:heavy_check_mark:
@typescript-eslint/no-array-constructor	Disallow generic Array constructors	:heavy_check_mark:	:wrench:
@typescript-eslint/no-empty-interface	Disallow the declaration of empty interfaces (no-empty-interface from TSLint)	:heavy_check_mark:
@typescript-eslint/no-explicit-any	Disallow usage of the any type (no-any from TSLint)	:heavy_check_mark:
@typescript-eslint/no-extraneous-class	Forbids the use of classes as namespaces (no-unnecessary-class from TSLint)
@typescript-eslint/no-inferrable-types	Disallows explicit type declarations for variables or parameters initialized to a number, string, or boolean. (no-inferrable-types from TSLint)	:heavy_check_mark:	:wrench:
@typescript-eslint/no-misused-new	Enforce valid definition of new and constructor. (no-misused-new from TSLint)	:heavy_check_mark:
@typescript-eslint/no-namespace	Disallow the use of custom TypeScript modules and namespaces (no-namespace from TSLint)	:heavy_check_mark:
@typescript-eslint/no-non-null-assertion	Disallows non-null assertions using the ! postfix operator (no-non-null-assertion from TSLint)	:heavy_check_mark:
@typescript-eslint/no-object-literal-type-assertion	Forbids an object literal to appear in a type assertion expression (no-object-literal-type-assertion from TSLint)	:heavy_check_mark:
@typescript-eslint/no-parameter-properties	Disallow the use of parameter properties in class constructors. (no-parameter-properties from TSLint)	:heavy_check_mark:
@typescript-eslint/no-this-alias	Disallow aliasing this (no-this-assignment from TSLint)
@typescript-eslint/no-triple-slash-reference	Disallow /// <reference path="" /> comments (no-reference from TSLint)	:heavy_check_mark:
@typescript-eslint/no-type-alias	Disallow the use of type aliases (interface-over-type-literal from TSLint)
@typescript-eslint/no-unused-vars	Disallow unused variables (no-unused-variable from TSLint)	:heavy_check_mark:
@typescript-eslint/no-use-before-define	Disallow the use of variables before they are defined	:heavy_check_mark:
@typescript-eslint/no-var-requires	Disallows the use of require statements except in import statements (no-var-requires from TSLint)	:heavy_check_mark:
@typescript-eslint/prefer-interface	Prefer an interface declaration over a type literal (type T = { ... }) (interface-over-type-literal from TSLint)	:heavy_check_mark:	:wrench:
@typescript-eslint/prefer-namespace-keyword	Require the use of the namespace keyword instead of the module keyword to declare custom TypeScript modules. (no-internal-module from TSLint)	:heavy_check_mark:	:wrench:
@typescript-eslint/restrict-plus-operands	When adding two variables, operands must both be of type number or of type string. (restrict-plus-operands from TSLint)
@typescript-eslint/type-annotation-spacing	Require consistent spacing around type annotations (typedef-whitespace from TSLint)	:heavy_check_mark:	:wrench: