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babel-plugin-import

1.11.0 • Public • Published

babel-plugin-import

Modular import plugin for babel, compatible with antd, antd-mobile, lodash, material-ui, and so on.

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Why babel-plugin-import

Where to add babel-plugin-import

Example

{ "libraryName": "antd" }

import { Button } from 'antd';
ReactDOM.render(<Button>xxxx</Button>);
 
      ↓ ↓ ↓ ↓ ↓ ↓
      
var _button = require('antd/lib/button');
ReactDOM.render(<_button>xxxx</_button>);

{ "libraryName": "antd", style: "css" }

import { Button } from 'antd';
ReactDOM.render(<Button>xxxx</Button>);
 
      ↓ ↓ ↓ ↓ ↓ ↓
      
var _button = require('antd/lib/button');
require('antd/lib/button/style/css');
ReactDOM.render(<_button>xxxx</_button>);

{ "libraryName": "antd", style: true }

import { Button } from 'antd';
ReactDOM.render(<Button>xxxx</Button>);
 
      ↓ ↓ ↓ ↓ ↓ ↓
      
var _button = require('antd/lib/button');
require('antd/lib/button/style');
ReactDOM.render(<_button>xxxx</_button>);

Note : with style: true css source files are imported and optimizations can be done during compilation time. With style: "css", pre bundled css files are imported as they are.

style: true can reduce the bundle size significantly, depending on your usage of the library.

Usage

npm install babel-plugin-import --save-dev

Via .babelrc or babel-loader.

{
  "plugins": [["import", options]]
}

options

options can be object.

{
  "libraryName": "antd",
  "style": true,   // or 'css'
}
{
  "libraryName": "lodash",
  "libraryDirectory": "",
  "camel2DashComponentName": false,  // default: true
}
{
  "libraryName": "@material-ui/core",
  "libraryDirectory": "components",  // default: lib
  "camel2DashComponentName": false,  // default: true
}

~options can be an array.~ It's not available in babel@7+

For Example:

[
  {
    "libraryName": "antd",
    "libraryDirectory": "lib",   // default: lib
    "style": true
  },
  {
    "libraryName": "antd-mobile"
  },
]

Options can't be an array in babel@7+, but you can add plugins with name to support multiple dependencies.

For Example:

// .babelrc
"plugins": [
  ["import", { "libraryName": "antd", "libraryDirectory": "lib"}, "ant"],
  ["import", { "libraryName": "ant-mobile", "libraryDirectory": "lib"}, "ant-mobile"]
]

style

  • ["import", { "libraryName": "antd" }]: import js modularly
  • ["import", { "libraryName": "antd", "style": true }]: import js and css modularly (LESS/Sass source files)
  • ["import", { "libraryName": "antd", "style": "css" }]: import js and css modularly (css built files)

If option style is a Function, babel-plugin-import will auto import the file which filepath equal to the function return value. This is useful for the components library developers.

e.g.

  • ["import", { "libraryName": "antd", "style": (name) => `${name}/style/2x` }]: import js and css modularly & css file path is ComponentName/style/2x

If a component has no style, you can use the style function to return a false and the style will be ignored.

e.g.

[
  "import", 
    { 
      "libraryName": "antd", 
      "style": (name: string, file: Object) => {
        if(name === 'antd/lib/utils'){
          return false;
        }
        return `${name}/style/2x`;
      }
    }
]

customName

We can use customName to customize import file path.

For example, the default behavior:

import { TimePicker } from "antd"
↓ ↓ ↓ ↓ ↓ ↓
var _button = require('antd/lib/time-picker');

You can set camel2DashComponentName to false to disable transfer from camel to dash:

import { TimePicker } from "antd"
↓ ↓ ↓ ↓ ↓ ↓
var _button = require('antd/lib/TimePicker');

And finally, you can use customName to customize each name parsing:

[
  "import", 
    { 
      "libraryName": "antd", 
      "customName": (name: string) => {
        if (name === 'TimePicker'){
          return 'antd/lib/custom-time-picker';
        }
        return `antd/lib/${name}`;
      }
    }
]

So this result is:

import { TimePicker } from "antd"
↓ ↓ ↓ ↓ ↓ ↓
var _button = require('antd/lib/custom-time-picker');

transformToDefaultImport

Set this option to false if your module does not have a default export.

Note

babel-plugin-import will not work properly if you add the library to the webpack config vendor.

install

npm i babel-plugin-import

Downloadsweekly downloads

69,752

version

1.11.0

license

MIT

homepage

github.com

repository

Gitgithub

last publish

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