hugo/content/en/hugo-pipes/babel.md

---
title: Babel
description: Hugo Pipes can process JS files with Babel.
date: 2019-03-21
publishdate: 2019-03-21
lastmod: 2019-03-21
categories: [asset management]
keywords: []
menu:
  docs:
    parent: "pipes"
    weight: 48
weight: 48
sections_weight: 48
draft: false
---

Any JavaScript resource file can be transpiled to another JavaScript version using `resources.Babel` which takes for argument the resource object and an optional dict of options listed below. Babel uses the [babel cli](https://babeljs.io/docs/en/babel-cli).


{{% note %}}
Hugo Pipe's Babel requires the `@babel/cli` and `@babel/core` JavaScript packages to be installed in the project or globally (`npm install -g @babel/cli @babel/core`) along with any Babel plugin(s) or preset(s) used (e.g., `npm install @babel/preset-env --save-dev`).

If you are using the Hugo Snap package, Babel and plugin(s) need to be installed locally within your Hugo site directory, e.g., `npm install @babel/cli @babel/core --save-dev` without the `-g` flag.
{{% /note %}}


### Config

{{< new-in "v0.75.0" >}}

In Hugo `v0.75` we improved the way we resolve JS configuration and dependencies. One of them is that we now add the main project's `node_modules` to `NODE_PATH` when running Babel and similar tools. There are some known [issues](https://github.com/babel/babel/issues/5618) with Babel in this area, so if you have a `babel.config.js` living in a Hugo Module (and not in the project itself), we recommend using `require` to load the presets/plugins, e.g.:


```js
module.exports = {
        presets: [
                [
                        require('@babel/preset-env'),
                        {
                                useBuiltIns: 'entry',
                                corejs: 3
                        }
                ]
        ]
};
```



### Options

config [string]
: Path to the Babel configuration file. Hugo will, by default, look for a `babel.config.js` in your project. More information on these configuration files can be found here: [babel configuration](https://babeljs.io/docs/en/configuration).

minified [bool]
: Save as much bytes as possible when printing

noComments [bool]
: Write comments to generated output (true by default)

compact [bool]
: Do not include superfluous whitespace characters and line terminators. Defaults to `auto` if not set.

verbose [bool]
: Log everything

sourceMap [string]
: Output `inline` or `external` sourcemap from the babel compile. External sourcemaps will be written to the target with the output file name + ".map". Input sourcemaps can be read from js.Build and node modules and combined into the output sourcemaps.


### Examples

```go-html-template
{{- $transpiled := resources.Get "scripts/main.js" | babel  -}}
```

Or with options:

```go-html-template
{{ $opts := dict "noComments" true }}
{{- $transpiled := resources.Get "scripts/main.js" | babel $opts -}}
```