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babel-plugin-transform-imports-2.0.0
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Transforms member style imports (import {x} from 'y') into default style imports (import x from 'y/lib/x')
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | babel-plugin-transform-imports-2.0.0 |
| نام | babel-plugin-transform-imports |
| نسخه کتابخانه | 2.0.0 |
| نگهدارنده | ['amctheatres'] |
| ایمیل نگهدارنده | ['websiteteam@amctheatres.com'] |
| نویسنده | AMC Theatres |
| ایمیل نویسنده | - |
| آدرس صفحه اصلی | git+https://bitbucket.org/amctheatres/babel-transform-imports.git |
| آدرس اینترنتی | https://bitbucket.org/amctheatres/babel-transform-imports |
| مجوز | ISC |
# babel-plugin-transform-imports
Transforms member style imports:
```javascript
import { Row, Grid as MyGrid } from 'react-bootstrap';
import { merge } from 'lodash';
```
...into default style imports:
```javascript
import Row from 'react-bootstrap/lib/Row';
import MyGrid from 'react-bootstrap/lib/Grid';
import merge from 'lodash/merge';
```
*Note: this plugin is not restricted to the react-bootstrap and lodash
libraries. You may use it with any library.*
## Why?
When Babel encounters a member style import such as:
```javascript
import { Grid, Row, Col } from 'react-bootstrap';
```
it will generate something similarish to:
```javascript
var reactBootstrap = require('react-bootstrap');
var Grid = reactBootstrap.Grid;
var Row = reactBootstrap.Row;
var Col = reactBootstrap.Col;
```
Which causes the entire library to be loaded, even though only some components
are needed. Some libraries are rather large and pulling in the entire module
would cause unnecessary bloat to your client optimized (webpack etc.) bundle.
The only way around this is to use default style imports:
```javascript
import Grid from 'react-bootstrap/lib/Grid';
import Row from 'react-bootstrap/lib/Row';
import Col from 'react-bootstrap/lib/Col';
```
But, the more pieces we need, the more this sucks. This plugin will allow you
to pull in just the pieces you need, without a separate import for each item.
Additionally, it can be configured to throw when somebody accidentally writes
an import which would cause the entire module to resolve, such as:
```javascript
import Bootstrap, { Grid } from 'react-bootstrap';
// -- or --
import * as Bootstrap from 'react-bootstrap';
```
## Installation
```
npm install --save-dev babel-plugin-transform-imports
```
## Usage
`.babelrc`:
```json
{
"plugins": [
["transform-imports", {
"react-bootstrap": {
"transform": "react-bootstrap/lib/${member}",
"preventFullImport": true
},
"lodash": {
"transform": "lodash/${member}",
"preventFullImport": true
}
}]
]
}
```
## Advanced Transformations
### Using regular expressions
Sometimes, you may wish to use regular expressions in your transformation (for
example, to enforce the same convention in all folder levels on the structure
of your library).
`.babelrc`:
```json
{
"plugins": [
["transform-imports", {
"my-library\/?(((\\w*)?\/?)*)": {
"transform": "my-library/${1}/${member}",
"preventFullImport": true
}
}]
]
}
```
Causes this code:
```javascript
import { MyModule } from 'my-library';
import { App } from 'my-library/components';
import { Header, Footer } from 'my-library/components/App';
```
to become:
```javascript
import MyModule from 'my-library/MyModule';
import App from 'my-library/components/App';
import Header from 'my-library/components/App/Header';
import Footer from 'my-library/components/App/Footer';
```
### Using a function as the transformer
If you need more advanced or more specific transformation logic, and are using
Babel 7+ with a `babel.config.js` file, you may provide a function instead of a
string for the `transform` option:
`babel.config.js`:
```javascript
module.exports = {
presets: ['@babel/env'],
plugins: [
['transform-imports', {
'my-library': {
transform: (importName, matches) => `my-library/etc/${importName.toUpperCase()}`,
preventFullImport: true,
},
'date-fns': {
transform: importName => `date-fns/${camelCase(importName)}`,
preventFullImport: true,
},
}]
]
};
```
You may combine a regular expression in the library name with a function
transform, and any captures of the regex will be passed as a second argument.
## Webpack
This can be used as a plugin with babel-loader.
webpack.config.js:
```javascript
module: {
rules: [{
test: /\.js$/,
exclude: /(node_modules|bower_components)/,
use: {
loader: 'babel-loader',
query: {
plugins: [
[require('babel-plugin-transform-imports'), {
'my-library': {
transform: function(importName, matches) {
return 'my-library/etc/' + importName.toUpperCase();
},
preventFullImport: true
}
}]
]
}
}
}]
}
```
## Version 2.0 Breaking Changes
Version 2.0 of this plugin targets Babel 7. Since Babel 7 allows for JS inside
the config via `.babelrc.js` or `babel.config.js`, the specialized transforms
`camelCase`, `kebabCase`, and `snakeCase` have been dropped. If you still need
this functionality, you can import `lodash` directly in your config file and
use those functions as part of a return value passed to the `transform` function
(see *Using a function as the transformer* above).
If you are on Babel 6, this plugin should still work, but if you need the prior
specialized functionality, please use the ^1.0.0 version of this library and
see the documentation located [here](https://bitbucket.org/amctheatres/babel-transform-imports/src/babel6/README.md).
## Options
| Name | Type | Required | Default | Description |
| --- | --- | --- | --- | --- |
| `transform` | `string or function` | yes | `undefined` | The library name to use instead of the one specified in the import statement. ${member} will be replaced with the import name, aka Grid/Row/Col/etc., and ${1-n} will be replaced by any matched regular expression groups. If using a JS Babel config file, a function may be passed directly. (see Advanced Transformations) |
| `preventFullImport` | `boolean` | no | `false` | Whether or not to throw when an import is encountered which would cause the entire module to be imported. |
| `skipDefaultConversion` | `boolean` | no | `false` | When set to true, will preserve `import { X }` syntax instead of converting to `import X`. |
نیازمندی
| مقدار | نام |
|---|---|
| ^7.4 | @babel/types |
| ^0.1.1 | is-valid-path |
زبان مورد نیاز
| مقدار | نام |
|---|---|
| 8.11.1 | Npm |
نحوه نصب
نصب پکیج tgz babel-plugin-transform-imports-2.0.0:
npm install babel-plugin-transform-imports-2.0.0.tgz