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@typescript-eslint/parser

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@typescript-eslint/parser

An ESLint custom parser which leverages TypeScript ESTree


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Package description

What is @typescript-eslint/parser?

The @typescript-eslint/parser is an ESLint parser that allows for the analysis and linting of TypeScript code. It is part of the TypeScript-ESLint project, which aims to bring ESLint's powerful static analysis capabilities to TypeScript codebases. The parser converts TypeScript source code into an ESTree-compatible form so that it can be used by ESLint for linting and other code analysis tasks.

What are @typescript-eslint/parser's main functionalities?

Parsing TypeScript code

This feature allows the parser to read TypeScript files and produce an abstract syntax tree (AST) that is compatible with ESLint, enabling it to understand and lint TypeScript syntax.

const { ESLint } = require('eslint');

async function main() {
  const eslint = new ESLint({
    parser: '@typescript-eslint/parser',
    parserOptions: {
      ecmaVersion: 2020,
      sourceType: 'module',
      project: './tsconfig.json'
    }
  });

  const results = await eslint.lintFiles(['src/**/*.ts']);
  // Handle the results
}

main();

Integration with ESLint rules

The parser can be used in conjunction with ESLint rules, including those specifically designed for TypeScript, to enforce code quality and style guidelines.

module.exports = {
  parser: '@typescript-eslint/parser',
  extends: [
    'plugin:@typescript-eslint/recommended'
  ],
  rules: {
    '@typescript-eslint/no-unused-vars': 'error',
    '@typescript-eslint/explicit-function-return-type': 'warn'
  }
};

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@typescript-eslint/parser

An ESLint parser which leverages TypeScript ESTree to allow for ESLint to lint TypeScript source code.

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👉 See https://typescript-eslint.io/packages/parser for documentation on this package.

See https://typescript-eslint.io for general documentation on typescript-eslint, the tooling that allows you to run ESLint and Prettier on TypeScript code.

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Package last updated on 22 Jul 2024

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