JavaScript rendering

By default, the crawler will not execute JavaScript. You can enable JavaScript rendering using the executeJavaScript method.

use Spatie\Crawler\Crawler;

Crawler::create('https://example.com')
    ->executeJavaScript()
    ->start();

When called without arguments, the crawler will use BrowsershotRenderer which requires spatie/browsershot to be installed. If Browsershot is not installed, an exception will be thrown.

##Configuring Browsershot

To customize Browsershot, pass a configured instance to BrowsershotRenderer:

use Spatie\Browsershot\Browsershot;
use Spatie\Crawler\Crawler;
use Spatie\Crawler\JavaScriptRenderers\BrowsershotRenderer;

$browsershot = (new Browsershot())
    ->noSandbox()
    ->waitUntilNetworkIdle();

Crawler::create('https://example.com')
    ->executeJavaScript(new BrowsershotRenderer($browsershot))
    ->start();

##Using Cloudflare Browser Rendering

The CloudflareRenderer uses a Cloudflare Browser Rendering endpoint to render JavaScript. It sends a POST request with the URL and expects a JSON response containing a content field with the rendered HTML.

use Spatie\Crawler\Crawler;
use Spatie\Crawler\JavaScriptRenderers\CloudflareRenderer;

Crawler::create('https://example.com')
    ->executeJavaScript(new CloudflareRenderer('https://your-worker.your-domain.workers.dev/render'))
    ->start();

You can also pass a custom Guzzle client to the renderer:

use GuzzleHttp\Client;
use Spatie\Crawler\JavaScriptRenderers\CloudflareRenderer;

$renderer = new CloudflareRenderer(
    'https://your-worker.your-domain.workers.dev/render',
    new Client(['timeout' => 30]),
);

##Custom renderers

You can create your own JavaScript renderer by implementing the JavaScriptRenderer interface:

use Spatie\Crawler\JavaScriptRenderers\JavaScriptRenderer;

class MyRenderer implements JavaScriptRenderer
{
    public function getRenderedHtml(string $url): string
    {
        // return the rendered HTML for the given URL
    }
}

Then pass it to the crawler:

use Spatie\Crawler\Crawler;

Crawler::create('https://example.com')
    ->executeJavaScript(new MyRenderer())
    ->start();

##Disabling JavaScript execution

If you've enabled JavaScript rendering but want to disable it later in a chain:

use Spatie\Crawler\Crawler;

$crawler = Crawler::create('https://example.com')
    ->executeJavaScript();

$crawler->doNotExecuteJavaScript();