Registry / serialization / esprima-six-jpike

esprima-six-jpike

library1.1.1-dev-harmonyjsnpmunverified

Esprima (version 1.1.1-dev-harmony) is a high-performance, standard-compliant ECMAScript parser written in JavaScript. It supports full ES5.1 and experimental ES6/Harmony features (modules, classes, destructuring). Runs in browsers (IE6+) and Node.js (>=0.4.0). Known for being up to 3x faster than UglifyJS v1. This is an unofficial fork with the '-harmony' suffix, indicating pre-release support for ES6. Note: this package may be considered obsolete compared to mainline esprima releases.

serialization

npm install esprima-six-jpike

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · ESPRIMA-SIX-JPIKE

esprima-six-jpike

serializationjavascriptv1.1.1-dev-harmony

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

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

parse

✓ import { parse } from 'esprima-six-jpike'

✗ const parse = require('esprima-six-jpike').parse

ESM-style import works in supported Node versions; CommonJS require is also possible but the package uses global scope.

tokenize

✓ import { tokenize } from 'esprima-six-jpike'

✗ import tokenize from 'esprima-six-jpike/tokenize'

tokenize is available as a named export from the main module.

Syntax (type object)

✓ import { Syntax } from 'esprima-six-jpike'

✗ const Syntax = require('esprima-six-jpike').Syntax

Syntax is a named export containing node type constants. ESM is preferred in modern Node.

Shows parsing and tokenizing JavaScript code, including experimental ES6/Harmony syntax using the fork.

import { parse, tokenize } from 'esprima-six-jpike'; const code = 'const answer = 42;'; // Parse to AST (supports ES5.1, experimental harmony) const ast = parse(code, { tolerant: true, loc: true }); console.log(JSON.stringify(ast, null, 2)); // Tokenize const tokens = tokenize(code, { range: true }); console.log(tokens); // Example with harmony syntax const harmonyCode = 'class Person { constructor(name) { this.name = name; } }'; const harmonyAst = parse(harmonyCode, { jsx: false, type: 'module' }); console.log(harmonyAst);

Debug

Known issues

deprecatedThis package is an unofficial fork (esprima-six-jpike) and may not be maintained. Use official 'esprima' package instead.

fix

Switch to 'esprima' latest stable version (e.g., 4.0.1).

affects: >=1.0.0

gotchaThe '-harmony' suffix indicates pre-release ES6 support; features may be incomplete or unstable.

fix

For production ES6 parsing, use a dedicated ES6 parser like 'acorn' with the 'ecmaVersion' option.

affects: >=1.0.0

breakingNode engine requirement '>=0.4.0' is extremely old; newer Node versions may have compatibility issues or missing globals.

fix

Use a recent Node LTS version (e.g., 14.x or later) and test thoroughly, or migrate to a maintained parser.

affects: >=1.0.0

Errors

Common errors & fixes

ReferenceError: window is not defined

The package assumes a browser environment with 'window' global.

fix

Run in a browser or use a shim like 'global.window = global;' in Node.js.

TypeError: esprima is not a function

Incorrect import syntax (e.g., using default import instead of named import).

fix

Use named import: import { parse } from 'esprima-six-jpike'.

SyntaxError: Unexpected token ILLEGAL

The code contains ES6+ syntax that the harmony fork does not support fully.

fix

Use the 'ecmaVersion' option in a modern parser like 'acorn', or rewrite to ES5.1.

Upgrade

Version history

1.1.1-dev-harmonylatest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/ariya/esprima ↗

packagehttps://www.npmjs.com/package/esprima-six-jpike ↗

homepagehttp://esprima.org ↗