babel require hook
> The require hook will bind itself to node's require and automatically compile files on the fly.
One of the ways you can use Babel is through the require hook. The require hook
will bind itself to node's require and automatically compile files on the
fly. This is equivalent to CoffeeScript's
coffee-script/register.
``sh`
npm install babel-register --save-dev
`js`
require("babel-register");
All subsequent files required by node with the extensions .es6, .es, .jsx
and will be transformed by Babel.
Polyfill not included
You must include the polyfill separately
when using features that require it, like generators.
NOTE: By default all requires to node_modules will be ignored. You can
override this by passing an ignore regex via:
`jsnode_modules
require("babel-register")({
// This will override ignoring - you can alternatively pass`
// an array of strings to be explicitly matched or a regex / glob
ignore: false
});
`javascript
require("babel-register")({
// Optional ignore regex - if any filenames do match this regex then they
// aren't compiled.
ignore: /regex/,
// Ignore can also be specified as a function.
ignore: function(filename) {
if (filename === "/path/to/es6-file.js") {
return false;
} else {
return true;
}
},
// Optional only regex - if any filenames don't match this regex then they
// aren't compiled
only: /my_es6_folder/,
// Setting this will remove the currently hooked extensions of .es6, .es, .jsx
// and .js so you'll have to add them back if you want them to be used again.
extensions: [".es6", ".es", ".jsx", ".js"],
// Setting this to false will disable the cache.
cache: true
});
`
You can pass in all other options as well,
including plugins and presets. But note that the closest .babelrc
to each file still applies, and takes precedence over any options you pass in here.
By default babel-node and babel-register will save to a json cache in your
temporary directory.
This will heavily improve with the startup and compilation of your files. There
are however scenarios where you want to change this behaviour and there are
environment variables exposed to allow you to do this.
Specify a different cache location.
`sh`
BABEL_CACHE_PATH=/foo/my-cache.json babel-node script.js
Disable the cache.
`sh``
BABEL_DISABLE_CACHE=1 babel-node script.js