Question

我目前正在使用Puppeteer，每当我调用此函数时，＆＃34;选择器＆＃34;未定义。

＆＃13;

async function verifyTextPresent(page, selector){
  let myButton = await page.evaluate(() => document.querySelector(selector).innerText);
  console.log(myButton);
}

＆＃13;

ERROR：

(node:6996) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Evaluation failed: ReferenceError: selector is not defined
    at <anonymous>:1:20
(node:6996) [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

您需要将选择器传递给评估，如下所示：

async function verifyTextPresent(page, selector){
    let myButton = await page.evaluate((selector) => {
        document.querySelector(selector).innerText);
    }
    console.log(myButton);
}

我也更喜欢使用$ eval的快捷方式：

let myButton = await page.$eval(selector, e => e.innerText);

Answer 2

我最终得到了这个改变锯子的解决方案，它得到了文字：

async function verifyTextPresent(page, selector){
  let myButton= await page.$(selector);
  let selectorText = await (await elementForText.getProperty('innerText')).jsonValue();
      console.log(selectorText);
    }

从jQuery提取参数到JavaScript函数

2 个答案: