Registry / web-framework / jsy-transpile

jsy-transpile

library0.10.9jsnpmunverified

JSY is an offside-rule (indentation-based) syntax dialect for ECMAScript that transpiles to standard JavaScript via a scanner-pass transformation, without Babel, Acorn, or any runtime dependencies. Current stable version 0.10.9. It supports modern JavaScript up to ES2025, has zero dependencies, 6300+ unit tests, and works with Rollup, ESBuild, Parcel, Vite, and Node.js --loader. Unlike CoffeeScript or Python-inspired alternatives, JSY automatically keeps pace with new ECMAScript features because its transformation only handles indentation and comments, leaving the underlying JavaScript syntax untouched. The package was renamed from jsy-transpile to @jsy-lang/jsy.

web-framework

npm install jsy-transpile

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · JSY-TRANSPILE

jsy-transpile

web-frameworkjavascriptv0.10.9

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.

default (transpile)

✓ import jsy from '@jsy-lang/jsy'

✗ import { transpile } from '@jsy-lang/jsy'

Default export is the transpile function. Named export 'transpile' does not exist.

transpile

✓ import jsy from '@jsy-lang/jsy'; const result = jsy(code, options);

✗ const jsy = require('jsy-transpile');

Package renamed from jsy-transpile to @jsy-lang/jsy starting from v0.10.0. Use the scoped package.

transpile (CommonJS)

✓ const jsy = require('@jsy-lang/jsy');

✗ const jsy = require('jsy-transpile');

If using CommonJS, require the new scoped package. The old package jsy-transpile is deprecated.

Transpiles a simple JSY function with indentation-based syntax into standard JavaScript.

import jsy from '@jsy-lang/jsy'; const jsyCode = ` add = (a, b) -> a + b console.log add(1, 2) `; const jsCode = jsy(jsyCode, { module: true, sourceType: 'module', }); console.log(jsCode); // Output: // const add = (a, b) => { // return a + b // } // console.log(add(1, 2))

jsy --version

Debug

Known issues

breakingPackage renamed from jsy-transpile to @jsy-lang/jsy. All imports using the old package name will break.

fix

Replace 'jsy-transpile' with '@jsy-lang/jsy' in package.json and all imports.

affects: >=0.10.0

deprecatedThe old package 'jsy-transpile' on npm is no longer maintained. Use '@jsy-lang/jsy' instead.

fix

Run 'npm install @jsy-lang/jsy' and update imports.

affects: <0.10.0

gotchaThe default export is the transpile function, not an object. Do not destructure { transpile }.

fix

Use 'import jsy from "@jsy-lang/jsy"' and call jsy(source, options).

affects: >=0.5.0

gotchaJSY transformation is syntactical only; it does not transform JavaScript semantics. Some constructs (e.g., async/await inside indented blocks) require correct indentation to work.

fix

Ensure indentation is consistent (tabs or spaces, not mixed). Use 2 or 4 spaces per level.

affects: all

breakingOptions for transpile function have changed between pre-0.10 and 0.10+. The 'module' option now defaults to false.

fix

Explicitly set 'module: true' if you want ES module output.

affects: >=0.10.0

Errors

Common errors & fixes

Error: Cannot find module 'jsy-transpile'

Package renamed from jsy-transpile to @jsy-lang/jsy.

fix

Install @jsy-lang/jsy and update imports: 'npm install @jsy-lang/jsy' then 'import jsy from "@jsy-lang/jsy"'.

TypeError: jsy(...) is not a function

Attempting to use a named import { transpile } instead of default import.

fix

Use default import: 'import jsy from "@jsy-lang/jsy"'.

Parsing error: Unexpected token (1:1) after transpiling

Incorrectly structured JSY code, e.g., missing indentation or wrong syntax.

fix

Verify that all blocks are properly indented. JSY uses indentation to denote blocks. Use spaces consistently.

ReferenceError: module is not defined

Using CommonJS require in an ES module context.

fix

Use ES imports instead: 'import jsy from "@jsy-lang/jsy"'.

Upgrade

Version history

0.10.9latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/jsy-lang/jsy ↗

packagehttps://www.npmjs.com/package/jsy-transpile ↗

homepagehttps://jsy-lang.com ↗