This repository is no longer actively maintained. Current work on this technology has moved to esdown.
es6now is an ES6 to ES5 compiler, written in ES6. It will allow you to write programs using next-generation Javascript features without having to wait for Node or browsers to fully implement ES6.
es6now can also be used as a runtime environment for executing ES6 programs on top of Node.
Source maps are not required when debugging code translated with es6now. One of the fundamental design goals is that the output should look like the input. Line numbers, whitespace and comments are all maintained.
For more information:
Install globally with NPM (you may need to sudo
this):
npm install -g es6now
Start a REPL by running it without any arguments:
es6now
Execute a module by adding a path:
es6now main.js
Translate a module by using a hyphen:
es6now - src/main.js build/es6now.js -b -r
--input, -i (1) The file to translate.
--output, -o (2) The file to write to. If not set, then the output
will be written to the console.
--bundle, -b If present, module dependencies will be bundled
together in the output.
--runtime, -r If present, the es6now runtime code will be bundled
with the output.
--global, -g If specified, the name of the global variable to
dump this module's exports into, if the resulting
script is not executed within any module system.
es6now can also be used as a library. First, install locally with NPM:
npm install es6now
Translates ES6 code to ES5. The following options are defined:
true
, parse the input as a module. Otherwise, parse the input
as a script. The default is false
.true
, include the es6now runtime library in the output.
The default is false
.true
, wrap the output in boilerplate which will ensure compatibility
with Node and AMD modules. The default is false
.Example:
var es6now = require("es6now");
var output = es6now.translate("class C { foo() {} }", {
module: true,
wrap: true
});