eslint-plugin-typescript

eslint-plugin-typescript

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

Installation

You'll first need to install ESLint:

$ npm i eslint --save-dev

Next, install typescript-eslint-parser:

$ npm install typescript-eslint-parser --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 typescript-eslint-parser to the parser field and typescript to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

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

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

{
    "rules": {
        "typescript/rule-name": "error"
    }
}

Supported Rules

• typescript/type-annotation-spacing - enforces one space after the colon and zero spaces before the colon of a type annotation.
• typescript/explicit-member-accessibility - enforces accessibility modifiers on class properties and methods.
• typescript/interface-name-prefix - enforces interface names are prefixed.
• typescript/no-triple-slash-reference - enforces /// <reference /> is not used.
• typescript/no-explicit-any - enforces the any type is not used.
• typescript/no-angle-bracket-type-assertion - enforces the use of as Type assertions instead of <Type> assertions.
• typescript/no-namespace - disallows the use of custom TypeScript modules and namespaces.
• typescript/no-use-before-define - disallows the use of variables before they are defined
• typescript/prefer-namespace-keyword - enforces the use of the keyword namespace over module to declare custom TypeScript modules.
• typescript/no-type-literal - disallows the use of type aliases.
• typescript/member-ordering - enforces a standard member declaration order.