所以我尝试了puppeteer文档https：//pptr.dev/上的示例代码，但它行不通。我已经通过NPM安装了puppeteer 3.0.0。

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://example.com');
  await page.screenshot({path: 'example.png'});

  await browser.close();
})();

它会激发：UnhandledPromiseRejectionWarning：UnhandledPromiseRejection.这个错误可能是由于抛出一个没有catch块的异步函数内部，或者是由于拒绝了一个未用.catch（）处理的承诺。（拒绝ID：1）

所以我尝试了这段代码：

'use strict';

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  try {

    await page.goto('https://example.com');
    await page.screenshot({path: 'example.png'});

} catch (err) {
    console.error(err.message);
} finally {
    await browser.close();
  }

})();

编辑：完全错误

(node:12856) UnhandledPromiseRejectionWarning: Error: Failed to launch chrome!


TROUBLESHOOTING: https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md

    at onClose (C:\Users\tim\Desktop\te\node_modules\puppeteer\lib\Launcher.js:348:14)
    at ChildProcess.helper.addEventListener (C:\Users\tim\Desktop\te\node_modules\puppeteer\lib\Launcher.js:338:60)
    at ChildProcess.emit (events.js:194:15)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:248:12)
(node:12856) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:12856) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a
non-zero exit code.PS C:\Users\tim\Desktop\te>

但它仍然会触发相同的错误。我做错了什么？