Function performEvaluation

src/tools/script.ts:137–173

(
  evaluatable: Evaluatable,
  fnString: string,
  args: Array<JSHandle<unknown>>,
  response: Response,
  options?: {filePath: string; context: Context},
)

});

const performEvaluation = async (
  evaluatable: Evaluatable,
  fnString: string,
  args: Array<JSHandle<unknown>>,
  response: Response,
  options?: {filePath: string; context: Context},
) => {
  const fn = await evaluatable.evaluateHandle(`(${fnString})`);
  try {
    const result = await evaluatable.evaluate(
      async (fn, ...args) => {
        // @ts-expect-error no types for function fn
        return JSON.stringify(await fn(...args));
      },
      fn,
      ...args,
    );
    if (options?.filePath) {
      const data = new TextEncoder().encode(result ?? 'undefined');
      const {filename} = await options.context.saveFile(
        data,
        options.filePath,
        '.json',
      );
      response.appendResponseLine(
        `Script ran on page. Output saved to ${filename}.`,
      );
    } else {
      response.appendResponseLine('Script ran on page and returned:');
      response.appendResponseLine('```json');
      response.appendResponseLine(`${result}`);
      response.appendResponseLine('```');
    }
  } finally {
    void fn.dispose();
  }
};

const getPageOrFrame = async (
  page: Page,