Function getEmitExtension

src/index.ts:881–901

* Get the extension for a transpiled file. * [MUST_UPDATE_FOR_NEW_FILE_EXTENSIONS]

(path: string)

   * [MUST_UPDATE_FOR_NEW_FILE_EXTENSIONS]
   */
  function getEmitExtension(path: string) {
    const lastDotIndex = path.lastIndexOf('.');
    if (lastDotIndex >= 0) {
      const ext = path.slice(lastDotIndex);
      switch (ext) {
        case '.js':
        case '.ts':
          return '.js';
        case '.jsx':
        case '.tsx':
          return jsxEmitPreserve ? '.jsx' : '.js';
        case '.mjs':
        case '.mts':
          return '.mjs';
        case '.cjs':
        case '.cts':
          return '.cjs';
      }
    }
    return '.js';
  }

  type GetOutputFunction = (code: string, fileName: string) => SourceOutput;
  /**