@wpw/babel-preset-base

This is the default base babel preset to include in non-react projects. It is based on @babel/preset-env and includes some stage-3 plugins.

extends

@babel/preset-env.

You should add .browserslistrc to your project to target your environment. More information can be found here.

If you have incorporated using @wpw/cli, it is already taken care for you.

Plugins

The following babel plugins from stage-3 are included as dependency. They will be loaded by default, but you can disable it through options.

• @babel/plugin-syntax-dynamic-import
• @babel/plugin-syntax-import-meta
• @babel/plugin-proposal-class-properties - with option { "loose": false }.
• @babel/plugin-proposal-json-strings

Usage

yarn add @wpw/babel-preset-base --dev

In your .babelrc put

{
	"extends": ["@wpw/base"]
}

or in your babel.config.js/babelrc.js

module.exports = {
	extends: ['@wpw/base'],
};

NOTE: babel.config.js is used for project wide configuration. Please refer to the docs to find out which config formatting to use.

Options

@wpw/babel-preset-base can be configured to select which stage-3 plugins to exclude.

babelrc.js

module.exports = {
	extends: [
		'@wpw/base',
		{
			noDynamicImport: true, // disable @babel/plugin-syntax-dynamic-import
			target: 'not dead, > 0.25%', // browserslist query to pass to @babel/preset-env
		},
	],
};

noDynamicImport

boolean, defaults to false.

Set to true to disable @babel/plugin-syntax-dynamic-import.

noImportMeta

boolean, defaults to false.

Set to true to disable @babel/plugin-syntax-import-meta.

noClassProperties

boolean, defaults to false.

Set to true to disable @babel/plugin-proposal-class-properties.

noJsonStrings

boolean, defaults to false.

Set to true to disable @babel/plugin-proposal-json-strings.

Options for @babel/preset-env

What-ever else you pass to the config, is passed directly to @babel/preset-env. This gives you more control on how to configure the most stable env preset.

Please read the documentation for available options.

In most cases, you just need to put a browser query in your browserslist like

> 0.25%, not dead

and you are good to go.

You can put it under browserslist directive under package.json or in a separate .browserslistrc file.

We recommend .browserslistrc because it is shared across many tools. If you bootstrap your project using @wpw/cli, then it will be created automatically.