babel 7

Since v2, this package requires @babel/core@^7.0.0. If you use babel 6, you can still use the version "1.0.0" of this package. If you want to migrate, you can read the announcement and the official migration guide.

Alternatives

• @babel/preset-env, especially targets.node

Options

• target: 10, 10.13, 12, 12.10, 14 or 'current' (process.versions.node)
• loose: Enable “loose” transformations for any plugins in this preset that allow them (Disabled by default).
• modules - Enable transformation of ES6 module syntax to another module type (Enabled by default to "commonjs"). Can be false to not transform modules, or "commonjs"
• es2019 - Enable es2019 features (Enabled by default)
• es2020 - Enable es2020 features (Enabled by default)
• shippedProposals - Enable features in stages but already available in recent node version (Enabled by default)

Compatibility Table

| Feature | Node 10 | Node 10.13 | Node 12 | Node 14 | Node 14.8 | | --------------------------------------------------------------------------------------------------------------- | ------- | ---------- | ------- | --------- | --------- | | ES2015 | | | | | | transform-modules-commonjs | flag | flag | flag | with .mjs | with .mjs | | ES2019 | | | | | | syntax-optional-catch-binding | flag | yes | yes | yes | yes | | json-strings | yes | yes | yes | yes | yes | | ES2020 | | | | | | nullish-coalescing-operator | no | no | no | yes | yes | | optional-chaining | no | no | no | yes | yes | | Shipped Proposals | | | | | | numeric-separator | no | no | no | yes | yes | | top-level-await | no | no | no | no | yes |

Note that top level await is syntax only and is only available for supported versions.

Install

npm install --save-dev @babel/core babel-preset-latest-node
yarn add --dev @babel/core babel-preset-latest-node

Usage

Via .babelrc

.babelrc

{
  "presets": ["latest-node"]
}

{
  "presets": [["latest-node", { "target": "current" }]]
}

Via CLI

babel script.js --presets latest-node

Via Node API

require('babel-core').transform('code', {
  presets: [require('babel-preset-latest-node')],
});

require('babel-core').transform('code', {
  presets: [[require('babel-preset-latest-node'), { target: 'current' }]],
});