# Javascript Rendering

If you want to scrape a page that loads its data after Javascript execution then our API can fetch those pages by using headless browsers. To use this feature and render Javascript, simply pass **`dynamic=true`**, and our API will fetch that page by using headless Chrome browsers. The cost of using this feature is **5** credits and **25** credits if used with premium proxies.

{% hint style="info" %}
By default, this parameter is always set as **true** in our API. So, if you want to avoid using this feature and reduce your cost from 5 credits per request to 1 credit per request then simply pass **`dynamic=false`**.
{% endhint %}

### Usage

{% tabs %}
{% tab title="cURL" %}

```
curl "https://api.scrapingdog.com/scrape?api_key=5e5a97e5b1ca5b194f42da86&url=http://httpbin.org/ip"
```

{% endtab %}

{% tab title="Python" %}

```python
import requests

url = "https://api.scrapingdog.com/scrape"

params = {
    "api_key": "5e5a97e5b1ca5b194f42da86",
    "url": "http://httpbin.org/ip"
}

response = requests.get(url, params=params)

print(response.text)
```

{% endtab %}

{% tab title="Nodejs" %}

```javascript
const axios = require('axios');

const apiUrl = 'https://api.scrapingdog.com/scrape';
const apiKey = '5e5a97e5b1ca5b194f42da86';
const targetUrl = 'http://httpbin.org/ip';

const params = {
  api_key: apiKey,
  url: targetUrl
};

axios
  .get(apiUrl, { params })
  .then((response) => {
    if (response.status === 200) {
      console.log(response.data);
    } else {
      console.error(`Failed to retrieve data. Status code: ${response.status}`);
    }
  })
  .catch((error) => {
    console.error('An error occurred:', error.message);
  });



```

{% endtab %}

{% tab title="PHP" %}

```php
<?php
$apiUrl = 'https://api.scrapingdog.com/scrape';
$apiKey = '5e5a97e5b1ca5b194f42da86';
$targetUrl = 'http://httpbin.org/ip';

$queryParams = [
    'api_key' => $apiKey,
    'url' => $targetUrl
];

$queryString = http_build_query($queryParams);

$fullUrl = $apiUrl . '?' . $queryString;

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $fullUrl);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($curl);

if ($response === false) {
    echo 'cURL error: ' . curl_error($curl);
} else {
    $httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    if ($httpCode === 200) {
        echo $response;
    } else {
        echo 'Failed to retrieve data. Status code: ' . $httpCode;
    }
}

curl_close($curl);
?>

```

{% endtab %}

{% tab title="Ruby" %}

```ruby
require 'net/http'
require 'uri'

api_url = 'https://api.scrapingdog.com/scrape'
api_key = '5e5a97e5b1ca5b194f42da86'
target_url = 'http://httpbin.org/ip'


uri = URI.parse(api_url)
params = {
  'api_key' => api_key,
  'url' => target_url
}

uri.query = URI.encode_www_form(params)

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Get.new(uri.request_uri)

response = http.request(request)

if response.code == '200'
  puts response.body
else
  puts "Failed to retrieve data. Status code: #{response.code}"
end

```

{% endtab %}

{% tab title="Java" %}

```java
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class ScrapingDogAPITest {
    public static void main(String[] args) {
        try {
            String apiUrl = "https://api.scrapingdog.com/scrape";
            String apiKey = "5e5a97e5b1ca5b194f42da86";
            String targetUrl = "http://httpbin.org/ip";


            // Construct the query parameters
            Map<String, String> params = new HashMap<>();
            params.put("api_key", apiKey);
            params.put("url", targetUrl);
            params.put("dynamic", String.valueOf(dynamic));

            // Build the query URL
            StringBuilder query = new StringBuilder(apiUrl);
            query.append("?");
            for (Map.Entry<String, String> entry : params.entrySet()) {
                query.append(entry.getKey()).append("=").append(entry.getValue()).append("&");
            }
            String queryUrl = query.toString().substring(0, query.length() - 1);

            // Create an HTTP connection and set up the request
            URL url = new URL(queryUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");

            // Get the response code
            int responseCode = connection.getResponseCode();

            if (responseCode == HttpURLConnection.HTTP_OK) {
                // Read and print the response
                BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String inputLine;
                StringBuilder response = new StringBuilder();

                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }

                in.close();
                System.out.println(response.toString());
            } else {
                System.out.println("Failed to retrieve data. Status code: " + responseCode);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.scrapingdog.com/web-scraping-api/request-customization/javascript-rendering.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.