babel-preset-extendscript

What

Babel preset for transpiling ES2015 and modern JS conventions to ES3. Intended for use with Extendscript.

Install

With NPM:

$ npm install --save-dev babel-preset-extendscript

With Yarn:

$ yarn add --dev babel-preset-extendscript

Usage

Via .babelrc (Recommended)

.babelrc

{
  "presets": ["extendscript"]
}

Via CLI

$ babel script.js --presets extendscript

Via Node API

require('babel-core').transform('code', {
  presets: ['extendscript'],
});

Options

• loose - Enable "loose" transformations for any plugins in this preset that allow them (Disabled by default).
• modules - Enable transformation of ES6 module syntax to another module type (Enabled by default to "commonjs").
  • Can be false to not transform modules, or one of ["amd", "umd", "systemjs", "commonjs"]

{
  presets: [
    ["extendscript", {"loose": true, "modules": "amd"}]
  ]
}
{
  presets: [
    ["extendscript", {"loose": true, "modules": false}]
  ]
}

Features

ES2015

• babel-plugin-transform-es2015

Convenience

• console.log
• JSON.stringify
• JSON.parse
• setTimeout
• setInterval
• clearTimeout
• clearInterval

Shims

• Object.keys
• Object.assign
• Object.create
• Array.isArray
• Number.isFinite
• Array.prototype.forEach
• Array.prototype.find
• Array.prototype.filter
• Array.prototype.map
• Array.prototype.reduce

Shams

• Object.getPrototypeOf
• Object.defineProperty
• Object.defineProperties
• Object.getOwnPropertyNames
• Object.getOwnPropertyDescriptor
• Object.seal
• Object.freeze
• Object.isSealed
• Object.isFrozen
• Object.isExtensible

Fixes

• Wraps all conditional expressions in parentheses to prevent Expected: : error.

Known Issues

• CallExpression's that uses other transforms from this preset only insert them 1 level deep due to path.unshiftContainer adding a new CallExpression in Program:exit(). Need to figure out a way to do another Program:exit() after the first if new CallExpressions have been added so state[name].matches can be += 1'd.