typed-css-modules

This is a fork of https://github.com/Quramy/typed-css-modules.git

Creates TypeScript definition files from CSS Modules .css files.

If you have the following css,

/* styles.css */
.myClass {
  color: primary;
}

typed-css-modules creates the following .d.ts files from the above css:

/* styles.css.d.ts */
declare const styles: {
  readonly myClass: string;
};
export = styles;

So, you can import CSS modules' class or variable into your TypeScript sources:

/* app.ts */
import styles = require('./styles.css');
console.log(`<div class="${styles.myClass}"></div>`);
console.log(`<div style="color: ${styles.primary}"></div>`);

CLI

npm install -g @skbkontur/typed-css-modules

And exec tcm <input directory> command. For example, if you have .css files under src directory, exec the following:

tcm src

Then, this creates *.css.d.ts files under the directory which has original .css file.

(your project root)
- src/
    | myStyle.css
    | myStyle.css.d.ts [created]

output directory

Use -o or --outDir option.

For example:

tcm -o dist src

(your project root)
- src/
    | myStyle.css
- dist/
    | myStyle.css.d.ts [created]

file name pattern

By the default, this tool searches **/*.css files under <input directory>. If you can customize glob pattern, you can use --pattern or -p option.

tcm -p src/**/*.icss

watch

With -w or --watch, this CLI watches files in the input directory.

camelize CSS token

With -c or --camelCase, kebab-cased CSS classes(such as .my-class {...}) are exported as camelized TypeScript varibale name(export const myClass: string).

You can pass --camelCase dashes to only camelize dashes in the class name. Since version 0.27.1 in the webpack css-loader. This will keep upperCase class names intact, e.g.:

.SomeComponent {
  height: 10px;
}

becomes

export const SomeComponent: string;

See also webpack css-loader's camelCase option.

API

npm install typed-css-modules

import DtsCreator from 'typed-css-modules';
let creator = new DtsCreator();
creator.create('src/style.css').then(content => {
  console.log(content.tokens); // ['myClass']

  console.log(content.formatted);
  /*
  declare const styles: {
    readonly myClass: string;
  };
  export = styles;
  */

  content.writeFile(); // writes this content to "src/style.css.d.ts"
});

class DtsCreator

DtsCreator instance processes the input CSS and create TypeScript definition contents.

new DtsCreator(option)

You can set the following options:

• option.rootDir: Project root directory(default: process.cwd()).
• option.searchDir: Directory which includes target *.css files(default: './').
• option.outDir: Output directory(default: option.searchDir).
• option.camelCase: Camelize CSS class tokens.

create(filepath, contents) => Promise(dtsContent)

Returns DtsContent instance.

• filepath: path of target .css file.
• contents(optional): the CSS content of the filepath. If set, DtsCreator uses the contents instead of the original contents of the filepath.

class DtsContent

DtsContent instance has *.d.ts content, final output path, and function to write file.

writeFile() => Promise(dtsContent)

Writes the DtsContent instance's content to a file.

• dtsContent: the DtsContent instance itself.

tokens

An array of tokens retrieved from input CSS file. e.g. ['myClass']

contents

An array of TypeScript definition expressions. e.g. ['readonly "myClass": string;'].

formatted

A string of TypeScript definition expression.

e.g.

declare const styles: {
  readonly myClass: string;
};
export = styles;

outputFilePath

Final output file path.

Example

There is a minimum example in this repository example folder. Clone this repository and run cd example; npm i; npm start.

Or please see https://github.com/Quramy/typescript-css-modules-demo. It's a working demonstration of CSS Modules with React and TypeScript.

License

This software is released under the MIT License, see LICENSE.txt.