Note on ES2015 and JSX

Elliptical is plain ES5 Javacript, and should run in any modern browser. Anything making use of elliptical may use plain ES5 as well. However, using language features from ES2015 (ES6) and JSX makes development significantly easier. It is recommended (but again - not required!) that you use Babel to precompile your code into pure ES5 format.

Using Babel

If you would like to, you can set up your project like this:

npm install babel-preset-es2015 --save-dev
npm install babel-plugin-transform-react-jsx --save-dev

JSX Pragma

JSX needs a pragma to know the name of the createElement function. If you leave it out, JSX defaults to React.createElement and your code will throw lots of React is not defined errors.

You can specify this pragma it in each of your files with a @jsx pragma comment. You will need to put this comment at the top of every file that imports createElement.

/** @jsx createElement */

import {createElement} from 'elliptical'

Alternatively, you can set the pragma in your .babelrc file:

  "presets": ["es2015"],
  "plugins": [
    ["transform-react-jsx", {"pragma": "element"}]

However, keep in mind that this will likely cause your linter to complain.


If elliptical will be running on your server, you can use babel-register to compile your source files to plain ES5.

If elliptical will be running in a browser, you should make use of Browserify or Rollup to build browser runnable code.

npm install --save-dev browserify
npm install --save-dev babelify

# compile the entry point `src/index.js` to `dist/script.js`
browserify -t babelify src/index.js -o dist/script.js

Note about Generators

Please note that if you wish to use function * generators in the browser, you will likely need to use babel-plugin-transform-runtime and babel-runtime, as generators are not yet supported by all major browsers.