Function getWorkerType

packages/vite/src/node/plugins/workerImportMetaUrl.ts:135–182

(
  raw: string,
  clean: string,
  i: number,
)

}

async function getWorkerType(
  raw: string,
  clean: string,
  i: number,
): Promise<WorkerType> {
  const commaIndex = clean.indexOf(',', i)
  if (commaIndex === -1) {
    return 'classic'
  }
  const endIndex = findClosingParen(clean, i)

  // case: ') ... ,' mean no worker options params
  if (commaIndex > endIndex) {
    return 'classic'
  }

  // need to find in comment code
  let workerOptString = raw.substring(commaIndex + 1, endIndex)
  const hasViteIgnore = hasViteIgnoreRE.test(workerOptString)
  if (hasViteIgnore) {
    return 'ignore'
  }

  // need to find in no comment code
  const cleanWorkerOptString = clean.substring(commaIndex + 1, endIndex)
  const trimmedCleanWorkerOptString = cleanWorkerOptString.trim()
  if (!trimmedCleanWorkerOptString.length) {
    return 'classic'
  }

  // strip trailing comma for evalValue
  if (trimmedCleanWorkerOptString.endsWith(',')) {
    workerOptString = workerOptString.slice(
      0,
      cleanWorkerOptString.lastIndexOf(','),
    )
  }

  const workerOpts = await parseWorkerOptions(workerOptString, commaIndex + 1)
  if (
    workerOpts.type &&
    (workerOpts.type === 'module' || workerOpts.type === 'classic')
  ) {
    return workerOpts.type
  }

  return 'classic'
}

export const workerImportMetaUrlRE: RegExp =
  /\bnew\s+(?:Worker|SharedWorker)\s*\(\s*(new\s+URL\s*\(\s*('[^']+'|"[^"]+"|`[^`]+`)\s*,\s*import\.meta\.url\s*(?:,\s*)?\))/dg