swc-plugin-transform-imports

Another wasm plugin for swc, inspired from babel-plugin-transform-imports.

Installation

1npm install --save-dev swc-plugin-transform-imports
2# or
3yarn add -D swc-plugin-transform-imports

Usage

It follows resolving rule of node.js, can be use in .swcrc，webpack.config.js or next.config.js and so on. For Example:

1{
2  "jsc": {
3    "experimental": {
4      "plugins": [
5        [
6          "swc-plugin-transform-imports",
7          {
8            "antd": {
9              "transform": "antd/es/${member}",
10              "skipDefaultConversion": false,
11              "preventFullImport": true,
12              "style": "antd/es/${member}/style",
13              "memberTransformers": ["dashed_case"]
14            },
15            "lodash": {
16              "transform": "lodash/${member}",
17              "preventFullImport": true
18            }
19          }
20        ]
21      ]
22    }
23  }
24}

Can convert the following lines:

1import { Button as MyButton, BackTop } from "antd";
2import { merge } from "lodash";

To:

1import MyButton from "antd/es/button";
2import BackTop from "antd/es/back-top";
3import "antd/es/back-top/style";
4import "antd/es/button/style";
5import merge from "lodash/merge";

For next.js users

Ensure you read next.js compiler docs first!!!!

Since the semantic version association of @swc/core (npm) and swc_core (rust) for next.js is still experimental. next.js has a lot of breaking change in the swc native plugin mechanism between major and even minor versions.

It is possible that as next.js and swc are updated, the current plugin will fail in the new version. Hopefully the new plugin api for swc will be stable soon. Here is the current version correspondence.

next.js versions	This package version
12.3.x	0.1.5
13.0.x	0.2.1

Options

Name	Type	Required	Default	Description
transform	string	yes	undefined	The library name to use instead of the one specified in the import statement. ${member} will be replaced with the member, aka Grid/Row/Col/etc.
preventFullImport	boolean	no	true	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.
style	string	no	false	The style path of the member, ${member} will be replaced with the member, aka Grid/Row/Col/etc.
memberTransformers	Array<MemberTransformer>	no	[]	Member transformers

1. type MemberTransformer

1type MemberTransformer =
2  | "camel_case"
3  | "kebab_case"
4  | "pascal_case"
5  | "snake_case"
6  | "upper_case"
7  | "upper_first"
8  | "lower_case"
9  | "lower_first"
10  | "dashed_case";

Common Issues

Usually upgrading to the latest version of @swc/core and other swc tools will solve the problem, see the following issue for typical solution:

1. plugin-styled-components crashes with 'Error while importing "env"."__get_transform_plugin_config": unknown import.'