eo2js

library0.0.8jsnpmunverified

eo2js is a transpiler that converts EOLANG (EO) programs to JavaScript, enabling execution in Node.js and browser environments. Current version 0.0.8 is pre-1.0 with active development. It translates EO objects and contracts into equivalent JS classes and functions, preserving the purely object-oriented paradigm. Unlike general transpilers, it is purpose-built for EO's abstract object model, including attributes, dataization, and runtime type checking. Release cadence is irregular; frequent breaking changes expected. Differentiators: native EO-to-JS mapping, minimal runtime, and support for EO's freeze/lock semantics.

web-framework

npm install eo2js

package ↗

INSTALL

IMPORT

SIG · EO2JS

eo2js

web-frameworkjavascriptv0.0.8

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.

eo2js

✓ import eo2js from 'eo2js'

✗ const eo2js = require('eo2js')

Package uses ESM only; CJS require will fail with ERR_REQUIRE_ESM

compile

✓ import { compile } from 'eo2js'

✗ import compile from 'eo2js'

compile is a named export, not default

Package

✓ import { Package } from 'eo2js'

Used for object composition; available since 0.0.5

This code transpiles a simple EO program to JavaScript and executes it using the eolang runtime.

import eo2js from 'eo2js'; // Sample EO program const eoCode = ` [] > main "Hello, EO!" > msg QQ.io.stdout > @ msg \n `; try { const jsCode = eo2js(eoCode, { target: 'node' }); console.log('Transpiled JS:'); console.log(jsCode); // Execute the generated JS (requires eolang runtime) const { evaluate } = await import('eolang'); const result = await evaluate(jsCode); console.log('Output:', result); } catch (err) { console.error('Transpilation failed:', err); }

eo2js --version

Debug

Known issues

breakingAPI changes between minor versions: eo2js function signature changed in 0.0.5 from (code, options) to (source, options).

fix

Update calls to use new parameter order: eo2js(source, options)

affects: <0.0.5

breakingDefault export removed in 0.0.7; use named exports like compile instead.

fix

import { compile } from 'eo2js' instead of import eo2js from 'eo2js'

affects: >=0.0.7

gotchaTranspiled JS requires eolang runtime to execute; not standalone.

fix

Ensure eolang package is installed and imported before executing transpiled code

affects: *

deprecatedOptions.target deprecated since 0.0.6; use options.platform instead.

fix

Replace target with platform in options object

affects: >=0.0.6

Errors

Common errors & fixes

Error: Cannot find module 'eo2js'

Package is not installed or import path incorrect.

fix

Run npm install eo2js and ensure you are using ESM import syntax (not require).

SyntaxError: Unexpected token 'export'

Using CommonJS require() with an ESM-only package.

fix

Change to import statement and use .mjs file extension or 'type':'module' in package.json.

TypeError: eo2js is not a function

Default import used when package only provides named exports.

fix

Use import { compile } from 'eo2js' or import * as eo2js from 'eo2js' and call eo2js.compile().

Upgrade

Version history

0.0.8latest on npm

Audit

Dependencies

eolangrequiredRuntime for EOLANG base objects (e.g., bytes, int, string)

Agent activity

4 hits · last 30 days

node

Resources

packagehttps://www.npmjs.com/package/eo2js ↗