Registry / testing / typescript-eslint-language-service

typescript-eslint-language-service

library5.0.5jsnpmunverified

typescript-eslint-language-service is a TypeScript language service plugin designed to integrate ESLint functionality directly into TypeScript-aware IDEs. It reports ESLint errors as TypeScript semantic diagnostics and offers code-fixes for applicable ESLint issues, providing a unified linting experience. The current stable version is 5.0.5, with releases typically driven by bug fixes and updates to its peer dependencies, notably `eslint` and `@typescript-eslint/parser`. Key differentiators include its seamless integration into the TypeScript language service, allowing real-time feedback and quick fixes for ESLint rule violations without needing separate build steps or processes for linting, treating lint errors as native compiler errors within the IDE. It relies on peer dependencies `typescript`, `@typescript-eslint/parser`, and `eslint` for its operation.

testing

npm install typescript-eslint-language-service

github ↗package ↗

INSTALL

IMPORT

SIG · TYPESCRIPT-ESLINT-

typescript-eslint-language-service

testingjavascriptv5.0.5

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

typescript-eslint-language-service

✓ { "compilerOptions": { "plugins": [ { "name": "typescript-eslint-language-service", "watchDirs": ["src"] } ] } }

✗ import { PluginName } from 'typescript-eslint-language-service'; const plugin = require('typescript-eslint-language-service');

This package is a TypeScript language service plugin and is configured via `tsconfig.json`'s `compilerOptions.plugins` array, not imported directly into JavaScript/TypeScript code. The `name` property within the plugin object must exactly match the package name.

PluginOptions

✓ type PluginOptions = { name: "typescript-eslint-language-service"; watchDirs?: string[]; };

While not directly imported, the `PluginOptions` type illustrates the configurable properties of the plugin when defined in `tsconfig.json`.

This `tsconfig.json` snippet demonstrates how to activate the TypeScript ESLint language service plugin in your project, enabling real-time ESLint feedback and auto-fixes directly within your IDE.

{ "compilerOptions": { "target": "es2020", "module": "esnext", "lib": ["es2020", "dom"], "strict": true, "esModuleInterop": true, "skipLibCheck": true, "forceConsistentCasingInFileNames": true, "jsx": "react-jsx", "moduleResolution": "node", "baseUrl": ".", "paths": { "@/*": ["src/*"] }, // Configure the TypeScript ESLint Language Service plugin // This enables ESLint errors and fixes to appear directly in your IDE "plugins": [ { "name": "typescript-eslint-language-service", // Optionally, specify additional directories to watch for ESLint config changes. // By default, only .eslintrc.* files in the project root are watched. // Example: "watchDirs": ["config", "eslint-rules"] } ] }, "include": ["src/**/*.ts", "src/**/*.tsx", ".eslintrc.js"], "exclude": ["node_modules", "dist"] }

Debug

Known issues

breakingVersion 5.0.0 introduced breaking changes, requiring `eslint` version `8.0.0` or higher and `@typescript-eslint/parser` version `5.0.0` or higher as peer dependencies.

fix

Ensure `eslint@^8` and `@typescript-eslint/parser@^5` are installed in your project. If you cannot upgrade these peer dependencies, you must use `typescript-eslint-language-service@4.x.x`.

affects: >=5.0.0

breakingVersion 4.0.0 introduced breaking changes, requiring `@typescript-eslint/parser` version `4.0.0` or higher as a peer dependency.

fix

Upgrade `@typescript-eslint/parser` to `^4`. If you cannot upgrade, use `typescript-eslint-language-service@3.x.x`.

affects: >=4.0.0 <5.0.0

gotchaThe plugin's functionality can be disabled by setting the `TS_ESLINT_SERVICE_DISABLED` environment variable, which might lead to unexpected lack of ESLint feedback in your IDE.

fix

Ensure the `TS_ESLINT_SERVICE_DISABLED` environment variable is not set, or set to a falsy value, when you expect ESLint diagnostics to be active within your TypeScript IDE.

affects: *

gotchaBy default, the plugin only watches `.eslintrc.*` files in the project root. If your ESLint configuration files are located elsewhere, changes to them might not be immediately reflected.

fix

Use the `watchDirs` option in your `tsconfig.json` plugin configuration to specify additional directories containing ESLint configuration files, for example: `{"name": "typescript-eslint-language-service", "watchDirs": ["config"]}`.

affects: *

Errors

Common errors & fixes

Cannot find package 'eslint' or package '@typescript-eslint/parser'

Missing or incompatible peer dependencies preventing the plugin from loading or functioning correctly.

fix

Run `npm install -D eslint@^8 @typescript-eslint/parser@^5 typescript@^4` to install the required peer dependencies matching the `typescript-eslint-language-service@5.x.x` version.

Language service plugin 'typescript-eslint-language-service' could not be loaded.

Incorrect configuration in `tsconfig.json`, an incompatible Node.js/TypeScript version, or issues with peer dependency resolution.

fix

Verify that the plugin name in `tsconfig.json` is exactly `"typescript-eslint-language-service"`. Confirm all peer dependencies (`eslint`, `@typescript-eslint/parser`, `typescript`) are correctly installed and meet the minimum version requirements. Check your IDE's logs for more specific error details.

ESLint rules are not being applied, or configuration changes are not picked up after `eslint@8.35.0`.

Compatibility issues with newer ESLint versions (e.g., specific bug fixed in plugin version 5.0.4) or incorrect `watchDirs` configuration.

fix

Upgrade to `typescript-eslint-language-service@5.0.4` or newer to resolve known compatibility issues with `eslint@8.35.0`. Also, ensure any custom ESLint config file locations are included in the `watchDirs` plugin option in `tsconfig.json`.

Upgrade

Version history

5.0.5latest on npm

Audit

Dependencies

typescriptrequiredCore TypeScript language service functionality.

@typescript-eslint/parserrequiredRequired for ESLint to parse TypeScript code.

eslintrequiredCore ESLint functionality for linting.

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/Quramy/typescript-eslint-language-service ↗

packagehttps://www.npmjs.com/package/typescript-eslint-language-service ↗