Version 4.0.1
Stable version 4.0.1

Refs #1589
Closes gh-1940
2 files changed
tree: 626e96b066846c8fdac16351235539dfac6922ee
  1. .circleci/
  2. .github/
  3. bin/
  4. dist/
  5. docs/
  6. src/
  7. test/
  8. tools/
  9. .editorconfig
  10. .gitignore
  11. .npmignore
  12. .travis.yml
  13. appveyor.yml
  14. ChangeLog
  15. CONTRIBUTING.md
  16. LICENSE.BSD
  17. package.json
  18. README.md
  19. webpack.config.js
README.md

NPM version npm download Build Status Coverage Status

Esprima (esprima.org, BSD license) is a high performance, standard-compliant ECMAScript parser written in ECMAScript (also popularly known as JavaScript). Esprima is created and maintained by Ariya Hidayat, with the help of many contributors.

Features

API

Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.

A simple example on Node.js REPL:

> var esprima = require('esprima');
> var program = 'const answer = 42';

> esprima.tokenize(program);
[ { type: 'Keyword', value: 'const' },
  { type: 'Identifier', value: 'answer' },
  { type: 'Punctuator', value: '=' },
  { type: 'Numeric', value: '42' } ]
  
> esprima.parseScript(program);
{ type: 'Program',
  body:
   [ { type: 'VariableDeclaration',
       declarations: [Object],
       kind: 'const' } ],
  sourceType: 'script' }

For more information, please read the complete documentation.