eslint-plugin-typescript

eslint-plugin-typescript

TypeScript support for ESLint. (This is still in the very early stages, so please be patient.)

The below readme is for the upcoming 1.0.0 release. Please see this tag for the current NPM version (0.14.0)

Installation

You'll first need to install ESLint:

$ npm i eslint --save-dev

Next, install typescript if you haven’t already:

$ npm i typescript@~3.1.1 --save-dev

Last, install eslint-plugin-typescript:

$ npm install eslint-plugin-typescript --save-dev

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

Usage

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

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

Note: The plugin provides its own version of the typescript-eslint-parser via eslint-plugin-typescript/parser. This helps us guarantee 100% compatibility between the plugin and the parser.

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

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

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

{
    "extends": ["plugin:typescript/recommended"]
}

Supported Rules

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

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