ecstacy

ecstacy

The ideal JS development environment that'll make writing JS actually fun. Write your JS in the latest ES syntax, then serve compiled JS specific to the browser. If your code as generators, it compiles your JS to ES6 using regenerator, otherwise it just serves it as is.

The end goal of this project is to create a frontend flow where:

• Dependencies are written with ES6 modules or HTML imports
• Files are SPDY pushed to the client
• If JS uses an unsupported feature for the browser, it will be transpiled down

There's no build step to transpile your JS or a deploy step to create builds for every supported platform.

Features:

• Transpiles, minifies, and gzips all the JS and caches them
• Supports source maps, even inlined ones
• Last-Modified and ETag header support

API

var Ecstacy = require('ecstacy')

Ecstacy.folder

The cache folder where all the transpiled JS, minified, and gzipped files are saved. This build folder is global, but because code is cached based on a sha256 sum, there should not be any conflicts.

Ecstacy.clean()

Delete the entire cache folder.

Ecstacy.cache = {}

Per-file lru cache options. Defaults to:

• max - 100
• maxAge - Infinity

These cache useragent -> transforms lookups per instance. Each cached object is pretty low memory since they are simply references to objects already in memory.

var ecstacy = new Ecstacy(js, [map])

Create a new instance based on js with an optional source map. Inline source maps are also supported.

Some public properties:

• .code - the JS without source maps
• .map - the source map, if any
• .hash - the sha256 sum of the JS

ecstacy.build(useragent).then( data => )

Transpiles the JS and returns metadata on them.

• name - the name of the build
• date - the date this build was created for Last-Modified headers
• hash - a sha256 sha sum of the JS file in hex encoding for ETag headers
• transforms[] - an array of all the transform names used
• length[extension] - the byte size of each build for Content-Length headers

If no transforms were used, then name === hash and hash === ecstacy.hash. The possible extensions are:

• .json - the returns data
• .js
• .js.gz
• .js.map
• .js.map.gz
• .min.js
• .min.js.gz
• .min.js.map
• .min.js.map.gz

ecstacy.read(name, extension).then( buf => )

Read a file by its data.name and extension. Returns a Buffer, so you need to .toString() it yourself.

var ecstacy = Ecstacy(code)
ecstacy.build(useragent).then(function (data) {
  return ecstacy.read(data.name, '.min.js.gz')
}).then(function (buf) {
  return buf.toString()
})

You may want to serve the smallest of data.length['.min.js.gz'] and data.length['.min.js'] if you like to over-optimize. You also probably don't need to stringify the buffer to send it to the client.

ecstacy.use(transform)

Use a custom transform in additional to the included ones.

Notes

• UglifyJS currently does not support ES6 syntax, so JS with ES6 syntax will not be minified. If not minified, data.length['min.js'] will be 0.
• Runtimes for any transforms are not included. Still need to figure out a good story for this.
• Source maps are not tested. Please add tests!