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babelrc-rollup
Advanced tools
Builds a babel configuration for rollup-plugin-babel by reading .babelrc.
Builds a babel configuration for rollup-plugin-babel by reading .babelrc.
$ npm install --save-dev babelrc-rollup
Create a .babelrc
file at the root of your project as normal:
{
"presets": ["es2015"]
}
Inside your rollup.config.js
, do this:
import babelrc from 'babelrc-rollup';
import babel from 'rollup-plugin-babel';
export default {
…
plugins: [
babel(babelrc())
]
…
};
path
(default: '.babelrc'
)If you'd like to customize the path of your babelrc file, pass this option with
a string path that can be read using fs.readFile
.
config
Use this to avoid reading a babelrc file at all. You could use this to pull the
config from package.json
instead, for example.
addModuleOptions
(default: true
)Disable this option if you do not want the modules: false
option to be given
to presets in your babel config. You probably don't want to change this unless
you're using findRollupPresets
.
findRollupPresets
(default: false
)Enable this to replace presets with the equivalent rollup-compatible preset, if
available. When this option is enabled, babelrc-rollup will try to resolve e.g.
es2015-rollup
instead of es2015
. If no such preset can be found the original
will be used.
addExternalHelpersPlugin
(default: true
)By default, babelrc-rollup adds the external-helpers
plugin,
which ensures that only one copy of each helper ends up in your bundle. Disable
this option to prevent adding this plugin.
Since babel v6.13.0, presets may be given options by using a tuple of
[name, opts]
. For example, instead of
{
"presets": ["es2015"]
}
You can do this:
{
"presets": [
["es2015", { "modules": false }]
]
}
babelrc-rollup is meant to work with this version of babel or later, but earlier
versions are supported by using the right options. The old way to configure the
es2015
preset for use with rollup was to use the es2015-rollup
preset
instead. To continue doing that, call babelrc
like so:
babelrc({
addModuleOptions: false,
findRollupPresets: true,
addExternalHelpersPlugin: false
})
If you use the es2015
preset, make sure you install es2015-rollup
too. If
you can use babel v6.13.0 or later, you should do so.
FAQs
Builds a babel configuration for rollup-plugin-babel by reading .babelrc.
The npm package babelrc-rollup receives a total of 315 weekly downloads. As such, babelrc-rollup popularity was classified as not popular.
We found that babelrc-rollup demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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