node.js - 无头木偶的Node.js问题：True：“评估失败：TypeError：无法读取属性'querySelectorAll' of null”

Question

我的代码与 headless false 完美配合，但是当我将其更改为 true 时，我收到此错误：

(node:92024) UnhandledPromiseRejectionWarning: Error: Evaluation failed: TypeError: Cannot read property 'querySelectorAll' of null
    at __puppeteer_evaluation_script__:7:17
    at ExecutionContext._evaluateInternal (C:\wamp64\www\scrappingWithNodejs\testDiscordBot\node_modules\puppeteer\lib\cjs\puppeteer\common\ExecutionContext.js:221:19)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async ExecutionContext.evaluate (C:\wamp64\www\scrappingWithNodejs\testDiscordBot\node_modules\puppeteer\lib\cjs\puppeteer\common\ExecutionContext.js:110:16)   
    at async getAllInfos (C:\wamp64\www\scrappingWithNodejs\testDiscordBot\index.js:28:12)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:92024) 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(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:92024) [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.

我的代码：

async function getAllInfos() {
  const browser = await puppeteer.launch({ headless: true }); 
  const page = await browser.newPage();
  page.setDefaultNavigationTimeout(0);
  await page.goto(`https://www.japanread.cc/`, {
    waitUntil: ["load", "domcontentloaded", "networkidle0", "networkidle2"],
  }); //se rendre sur une page
    let trs = [];

    trs = tbody.querySelectorAll("tr");//the error is here

我试图把showMo，把几个东西放在“waitUntil”，但我什么也没得到，我真的不明白。你知道问题是什么吗？

标签： node.jspuppeteerheadless-browser