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esprima-next

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esprima-next

ECMAScript parsing infrastructure for multipurpose analysis

  • 6.0.3
  • latest
  • Source
  • npm
  • Socket score

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156K
decreased by-8.83%
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1
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NPM version npm download Tests

Todo: Coverage does not work atm. 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.

esprima-next

A fork of esprima (https://github.com/jquery/esprima), cause esprima has no new releases and many not merged pull req. if development/maintenance at jquery will start again, we maybe remove this fork.

Changes to original Esprima:

  • Rename to esprima-next
  • generate a ESM build
  • update npm packages
  • disable npm run static-analysis && npm run dynamic-analysis, seem not to work after package update
  • we don't need to support node <= 12
  • ES2022 Class Properties & Privates
  • Support numeric seperator and BigInt
  • import assertions

following Pull reqs are merged from @esprima github:

  • Export Esrpima Nodes type #2045
  • Fix super() in non derived class #2047
  • Support for ES2020 import.meta #2052
  • Support for ES2020 export ns from #2055
  • Fix parsing error in exponent expressions with unary left-hand sides. #2070
  • bugfix import() #2076
  • Support ES2021 Logical Assignment #2082
  • ESM release support #2081

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:

> import { esprima } from 'esprima-next';
> 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.

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Package last updated on 13 Mar 2024

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