babel-plugin-filter-imports


This babel plugin is used to removed references to imports within a module. This can be useful for removing debugging statements when doing a production build of your code. It is often used in conjunction with other tools like Uglify that perform dead code elimination.

Installation

``sh
$ yarn add --dev babel-plugin-filter-imports
`

This plugin is for Babel 7. If you need to support:
- Babel 6 use the babel6 branch
- Babel 5 use the v0.2.x branch

Example

Given the .babelrc

`json
{
"plugins": [["filter-imports", {
"imports": {
"debugging-tools": [ "warn" ]
}
}]]
}
`

the module

`js
import { warn } from 'debugging-tools';

function join(args, sep) {
if (arguments.length > 2) {
warn("join expects at most 2 arguments");
}
return args.join(sep);
}
`

will be transformed to

`js
function join(args, sep) {
if (arguments.length > 2) {
}
return args.join(sep);
}
`

Configuration

- options[keepImports] [Boolean]: An flag that indicates imports removal from header.
- options[imports] [Object]: An object whose keys are names of modules.
- options[imports][moduleName] [String]: An array of names of imports from moduleName to be removed. You can include 'default' for default export and '*' for a namespace export.

Upgrade to 1.x/2.x

There were breaking changes in the plugin configuration, you must update it to work correctly.

##### Before 1.x

`json
{
"plugins": [["filter-imports", {
"debugging-tools": [ "warn" ]
}]]
}
`

##### After

`json
{
"plugins": [["filter-imports", {
"imports": {
"debugging-tools": [ "warn" ]
}
}]]
}
``