从 puppeteer .innertext js 获取数据时遇到问题

Question

我无法获取元素中列出的文本。我以为我做对了，但我不断出错。这是我试图获得的元素。任何帮助都会很棒。无法 link 该站点，因为您必须登录才能访问此页面。

<p><span class="query-player_current">1</span>
/
<span class="query-player_max">32</span></p>

（尝试获取“1”和“32”）^

这是我的代码。

const result = await page.evaluate (() => {
        let playerCount = document.querySelector('query-player_current').innerText;
        let playerCountMax = document.querySelector('query-player_max').innerText;
        return {
            playerCount,
            playerCountMax
        }
    })

这是我遇到的错误

Error: Evaluation failed: TypeError: Cannot read property 'innerText' of null
    at __puppeteer_evaluation_script__:2:73
    at ExecutionContext._evaluateInternal (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\ExecutionContext.js:122:13)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async ExecutionContext.evaluate (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\ExecutionContext.js:48:12)
    at async downloadLog (C:\Users\logan\Desktop\GamerBot\commands\test2.js:56:20)
    at async Object.module.exports.run (C:\Users\logan\Desktop\GamerBot\commands\test2.js:15:3)
  -- ASYNC --
    at ExecutionContext.<anonymous> (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\helper.js:111:15)
    at DOMWorld.evaluate (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\DOMWorld.js:112:20)
  -- ASYNC --
    at Frame.<anonymous> (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\helper.js:111:15)
    at Page.evaluate (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\Page.js:860:43)
    at Page.<anonymous> (C:\Users\logan\Desktop\GamerBot\node_modules\puppeteer\lib\helper.js:112:23)
    at downloadLog (C:\Users\logan\Desktop\GamerBot\commands\test2.js:56:31)
    at async Object.module.exports.run (C:\Users\logan\Desktop\GamerBot\commands\test2.js:15:3)```

Answer 1

您必须使用“.”作为前缀，如果您在查询中使用类名。尝试

 document.querySelector('.query-player_current')
 document.querySelector('.query-player_max')

Documentation

从 puppeteer .innertext js 获取数据时遇到问题

having trouble getting data from puppeteer .innertext js

javascript

puppeteer

innertext