Question

我正在尝试使用puppeteer构建一个网络抓取工具，该工具抓取我的venmo页面以查找付款。当我尝试运行脚本时，出现错误消息“ page.goto不是函数”

老实说，我不太确定从哪里开始

const puppeteer = require('puppeteer');

const url = 'generic.com';

(async () =>  {

//running in headless to observe what happens for now 
const browser = await puppeteer.launch({headless: false});
const page = browser.newPage();
await page.goto(url);

let data = await page.evaluate(() => {

    let amount = document.querySelector('span.bold.medium.green').innerText;
    let timePayed = document.querySelector('a.grey_link').innerText;

    return { 
         amount,
         timePayed
    }
});

console.log(data);

debugger;

await browser.close();

})();

这是我的错误消息

UnhandledPromiseRejectionWarning: TypeError: page.goto is not a function
at D:\venmoScraper\scraper.js:12:12
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:13212) 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:13212) [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.

Answer 1

行

const page = browser.newPage();

应写为

const page = await browser.newPage();

browser.newPage()返回为Promise。

Answer 2

除了上述有用的答案外，初学者可能还需要仔细检查 page.goto 上方的行是否具有正确的语法，即page = await browser.newPage();而不是{{1 }}（不要忘记将其放在括号中）。

（我知道所问的问题有所不同，但认为这可能很有用，因为这是我遇到的' page.goto不是函数'错误）

如何修复Web刮板中的'page.goto不是函数'错误

2 个答案: