> ## Documentation Index
> Fetch the complete documentation index at: https://help.decodo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# JavaScript 渲染

> Site Unblocker JavaScript 渲染

如果您打算抓取的页面需要执行 JavaScript 才能动态加载所有必要的数据，您可以启用 JavaScript 渲染，而无需使用无头浏览器。

#### 以 HTML 格式接收渲染的页面内容

<CodeGroup>
  ```shellscript cURL theme={null}
  curl -k -v -x unblock.decodo.com:60000 \
  -U "USERNAME:PASSWORD" "https://ip.decodo.com/" \
  -H "X-SU-Headless: html"
  ```

  ```python Python theme={null}
  import requests

  proxies = {
      'http': 'http://USERNAME:PASSWORD@unblock.decodo.com:60000',
      'https': 'http://USERNAME:PASSWORD@unblock.decodo.com:60000'
  }

  headers= {
     "X-SU-Headless": "html"
  }

  response = requests.request(
      'GET',
      'https://ip.decodo.com/',
      verify=False,
      proxies=proxies,
      headers=headers
  )

  print(response.text)
  ```

  ```javascript Node.js theme={null}
  import fetch from 'node-fetch';
  import createHttpsProxyAgent from 'https-proxy-agent'

  const username = 'YOUR_USERNAME';
  const password = 'YOUR_PASSWORD';

  const agent = createHttpsProxyAgent(
    `http://${username}:${password}@unblock.decodo.com:60000`
  );

  process.env['NODE_TLS_REJECT_UNAUTHORIZED'] = 0;

  const headers = {
   	'X-SU-Headless': 'html'
  }

  const response = await fetch('https://ip.decodo.com/', {
    method: 'get',
    headers: headers,
    agent: agent
  });

  console.log(await response.text());
  ```
</CodeGroup>

#### 以 PNG 格式接收渲染的页面内容

响应将包含可以保存为 PNG 格式的图像原始字节

<CodeGroup>
  ```shellscript cURL theme={null}
  curl -k -v -x unblock.decodo.com:60000 \
  -U "USERNAME:PASSWORD" "https://ip.decodo.com/" \
  -H "X-SU-Headless: png"
  ```

  ```python Python theme={null}
  import requests

  proxies = {
      'http': 'http://USERNAME:PASSWORD@unblock.decodo.com:60000',
      'https': 'http://USERNAME:PASSWORD@unblock.decodo.com:60000'
  }

  headers= {
     "X-SU-Headless": "png"
  }

  response = requests.request(
      'GET',
      'https://ip.decodo.com/',
      verify=False,
      proxies=proxies,
      headers=headers
  )

  print(response.text)
  ```

  ```javascript Node.js theme={null}
  import fetch from 'node-fetch';
  import createHttpsProxyAgent from 'https-proxy-agent'

  const username = 'YOUR_USERNAME';
  const password = 'YOUR_PASSWORD';

  const agent = createHttpsProxyAgent(
    `http://${username}:${password}@unblock.decodo.com:60000`
  );

  process.env['NODE_TLS_REJECT_UNAUTHORIZED'] = 0;

  const headers = {
   	'X-SU-Headless': 'png'
  }

  const response = await fetch('https://ip.decodo.com/', {
    method: 'get',
    headers: headers,
    agent: agent
  });

  console.log(await response.text());
  ```
</CodeGroup>

***

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