jazzle

library0.9.12jsnpmunverified

Jazzle is a high-performance ECMAScript transpiler with zero dependencies, designed to convert modern JavaScript features (destructuring, classes, lexical variables, arrow functions, template strings) into ES5-compatible code. As of version 0.9.12, it is still in active development with a focus on efficiency and correctness, notably handling temporal dead zones and super-bound this references. It claims to be roughly 2x faster than Babel on early benchmarks. The package provides a programmatic API (Node.js >=6.20.0) with CLI support planned but not yet released. It differentiates itself by targeting edge cases often missed by other transpilers, while maintaining minimal footprint.

serialization web-framework

npm install jazzle

github ↗package ↗

INSTALL

IMPORT

SIG · JAZZLE

jazzle

serializationjavascriptv0.9.12

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.

jazzle

✓ const jazzle = require('jazzle')

✗ import jazzle from 'jazzle'

The package is CJS-only and does not support ESM imports.

transform

✓ const result = jazzle.transform(src, options)

✗ jazzle.transform(src)

Options must be provided; setting sourceType correctly (e.g., 'module') is important for modern syntax.

default

✓ const jazzle = require('jazzle')

✗ const { jazzle } = require('jazzle')

The default export is the main transform function, not an object with a 'jazzle' property.

Demonstrates basic usage: requiring jazzle, transforming a code snippet with options, and logging the output.

const jazzle = require('jazzle'); const src = 'let [myCoolSource] = ((a=myCoolSource) => [a])();'; const options = { sourceType: 'module' }; const result = jazzle.transform(src, options); console.log(result.code); // Output includes sourceMap property as well

Debug

Known issues

gotchaOptions object (including sourceType) is required; omitting it may cause unexpected behavior or errors.

fix

Always pass an options object with at least sourceType set to 'module' or 'script' as appropriate.

affects: >=0.0.0

gotchaCLI is not yet available despite being referenced in the README; use programmatic API only.

fix

Use the Node.js API via require('jazzle') for all transpilation tasks.

affects: >=0.0.0

breakingVersion 0.x may contain breaking changes between minor versions; no stability guarantees.

fix

Pin to a specific version and test before upgrading.

affects: >=0.0.0 <1.0.0

gotchaThe package does not support ESM imports; only CommonJS require works.

fix

Use require() instead of import statements when consuming this package.

affects: >=0.0.0

Errors

Common errors & fixes

Error: Cannot find module 'jazzle'

Package not installed or global install not in NODE_PATH.

fix

Run 'npm install jazzle' locally or 'npm install -g jazzle' for global CLI (though CLI not available).

TypeError: jazzle.transform is not a function

Using default import incorrectly (e.g., import jazzle from 'jazzle' with ESM bundler).

fix

Use 'const jazzle = require("jazzle")' and then call jazzle.transform().

SyntaxError: Unexpected token (1:4) / unsupported feature

Source code uses syntax not supported by Jazzle or missing sourceType option.

fix

Ensure sourceType is 'module' for ES modules, and check that the feature is supported by Jazzle.

Upgrade

Version history

0.9.12latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

3 hits · last 30 days

node

Resources

githubhttps://github.com/JazzleWare/jazzle ↗

packagehttps://www.npmjs.com/package/jazzle ↗