If you're familiar with TypeScript and ESLint, and you'd like to see this project progress, please consider contributing. We need people with a good knowledge of TypeScript to ensure that the integration with the ESLint ecosystem is useful.
TypeScript ESLint Parser
An ESLint custom parser which leverages TypeScript ESTree to allow for ESLint to lint TypeScript source code.
npm install --save-dev typescript-eslint-parser
In your ESLint configuration file, set the
There is sometimes an incorrect assumption that the parser itself is what does everything necessary to facilitate the use of ESLint with TypeScript. In actuality, it is the combination of the parser and one or more plugins which allow you to maximize your usage of ESLint with TypeScript.
The core rules built into ESLint, such as
indent have no knowledge of such constructs, so it is impossible to expect them to work out of the box with them.
Instead, you also need to make use of one more plugins which will add or extend rules with TypeScript-specific features.
The following additional configuration options are available by specifying them in
parserOptions in your ESLint configuration file.
false. Enable parsing JSX when
true. More details can be found here.
*.tsfiles regardless of this option.
*.tsxfiles regardless of this option.
- Otherwise, it respects this option.
true. Please set
falseif you use this parser on ESLint v4. If this is
false, the parser creates the AST of JSX texts as the legacy style.
Supported TypeScript Version
We will always endeavor to support the latest stable version of TypeScript.
The version of TypeScript currently supported by this parser is
~3.1.1. This is reflected in the
devDependency requirement within the package.json file, and it is what the tests will be run against. We have an open
peerDependency requirement in order to allow for experimentation on newer/beta versions of TypeScript.
If you use a non-supported version of TypeScript, the parser will log a warning to the console.
Please ensure that you are using a supported version before submitting any issues/bug reports.
Please do not report parsing/AST issues in this repo, report them directly to TypeScript ESTree.
Please check the current list of open and known issues and ensure the issue has not been reported before. When creating a new issue provide as much information about your environment as possible. This includes:
- ESLint Version
- TypeScript version
- ESLint config or rules and plugins currently enabled
We have a very flexible way of running integration tests which connects all of the moving parts of the usage of this parser in the ESLint ecosystem.
We run each test within its own docker container, and so each one has complete autonomy over what dependencies/plugins are installed and what versions are used. This also has the benefit of not bloating the
node_modules of the parser project itself.
If you are going to submit an issue related to the usage of this parser with ESLint, please consider creating a failing integration test which clearly demonstrates the behavior. It's honestly super quick!
You just need to duplicate one of the existing test sub-directories found in
tests/integration/, tweak the dependencies and ESLint config to match what you need, and add a new entry to the docker-compose.yml file which matches the format of the existing ones.
npm run integration-tests
If you ever need to change what gets installed when the docker images are built by docker-compose, you will first need to kill the existing containers by running:
npm run kill-integration-test-containers
Issues and pull requests will be triaged and responded to as quickly as possible. We operate under the ESLint Contributor Guidelines, so please be sure to read them before contributing. If you're not sure where to dig in, check out the issues.
npm test- run all linting and tests
npm run lint- run all linting
npm run integration-tests- run only integration tests
TypeScript ESLint Parser is licensed under a permissive BSD 2-clause license.