test/helpers/trusted-types-html-generator-plugin.js

"use strict";

const HTMLContentForIndex = `
<!DOCTYPE html>
<html>
  <head>
    <meta
      http-equiv="Content-Security-Policy"
      content="require-trusted-types-for 'script'; trusted-types webpack webpack#dev-overlay;"
    />
    <meta charset='UTF-8'>
    <title>webpack-dev-server</title>
  </head>
  <body>
    <h1>webpack-dev-server is running...</h1>
    <script type="text/javascript" charset="utf-8" src="/main.js"></script>
  </body>
</html>
`;

const HTMLContentForTest = `
<!DOCTYPE html>
<html>
  <head>
    <meta
      http-equiv="Content-Security-Policy"
      content="require-trusted-types-for 'script'; trusted-types webpack webpack#dev-overlay;"
    />
    <meta charset='UTF-8'>
    <title>test</title>
  </head>
  <body>
    <h1>Created via HTMLGeneratorPlugin</h1>
  </body>
</html>
`;

module.exports = class HTMLGeneratorPlugin {
  // eslint-disable-next-line class-methods-use-this
  apply(compiler) {
    const pluginName = "html-generator-plugin";

    compiler.hooks.thisCompilation.tap(pluginName, (compilation) => {
      if (compiler.webpack) {
        const { RawSource } = compiler.webpack.sources;

        compilation.hooks.processAssets.tap(
          {
            name: pluginName,
            stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONAL,
          },
          () => {
            const indexSource = new RawSource(HTMLContentForIndex);
            const testSource = new RawSource(HTMLContentForTest);

            compilation.emitAsset("index.html", indexSource);
            compilation.emitAsset("test.html", testSource);
          }
        );
      } else {
        compilation.hooks.additionalAssets.tap(pluginName, () => {
          compilation.emitAsset("index.html", {
            source() {
              return HTMLContentForIndex;
            },
            size() {
              return HTMLContentForIndex.length;
            },
          });
          compilation.emitAsset("test.html", {
            source() {
              return HTMLContentForTest;
            },
            size() {
              return HTMLContentForTest.length;
            },
          });
        });
      }
    });
  }
};