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Babel preset for transpiling ES2015 and modern JS conventions to ES3.

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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.

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Babel preset for transpiling ES2015 and modern JS conventions to ES3.

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