What is the process for creating a module utilizing esbuild and the esbuild-css-modules-plugin to append css to body.shadowRoot?

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Here are the steps to create a module utilizing esbuild and the esbuild-css-modules-plugin to append css to body.shadowRoot:

1. Install the required modules:

   npm install esbuild esbuild-css-modules-plugin --save-dev
   

2. Create a JavaScript file where you will define your module logic:

   import esbuild from 'esbuild';
   import cssModulesPlugin from 'esbuild-css-modules-plugin';
   
   // Define your module code
   const appendCssToShadowRoot = async (css, options = {}) => {
    // Create a stylesheet and add the css rules as content
    const styleSheet = new CSSStyleSheet();
    await styleSheet.replace(css);
   
    // Get the body element and its shadow root
    const body = document.querySelector('body');
    const shadowRoot = body.shadowRoot || body.attachShadow({ mode: 'open' });
   
    // Append the stylesheet to the shadow root
    const styleElement = document.createElement('style');
    styleElement.id = options.id;
    styleElement.appendChild(styleSheet.cssRules[0].cssText);
    shadowRoot.appendChild(styleElement);
   }
   
   // Export your module function
   export default appendCssToShadowRoot;
   

3. Compile the module file using esbuild and the esbuild-css-modules-plugin:

   esbuild.build({
    entryPoints: ['path/to/your/module.js'],
    bundle: true,
    outfile: 'dist/module.js',
    plugins: [
      cssModulesPlugin({
        inject: false,
        generateScopedName: '[local]__[hash:base64:8]',
      }),
    ],
   });
   

4. Include the compiled module file in your HTML file:

   <script src="path/to/your/dist/module.js"></script>
   

5. You can now use the appendCssToShadowRoot function in your code and pass in the CSS as a string:

   import appendCssToShadowRoot from 'path/to/your/dist/module.js';
   
   appendCssToShadowRoot(`
    .my-class {
      font-size: 2rem;
    }
   `, { id: 'my-stylesheet' });
   

   This will append the CSS to the body's shadow root and give the style element an id of "my-stylesheet".