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Render JavaScript before the page comes back

JavaScript rendering loads the page in a real browser, so content that scripts add after the first HTML is part of the result. In a Standard request you set render_js=true, and ScrapeDrive picks the browser engine.

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An incomplete webpage becoming fully rendered after running in a browser.
curl "https://sync.scrapedrive.com/api/v1/scrape" \
  -H "Content-Type: application/json" \
  -d '{
    "api_key": "YOUR_KEY",
    "url": "https://example.com/app",
    "render_js": true
  }'

What this request asks for

render_js=true
Starts the request in a browser instead of a fast HTTP client.
X-Sdrive-Credits
Reports the settled charge. 10 credits for a datacenter browser request.

What it does for a request

Starts in a browser
With render_js=true the request starts in a real browser. The default, false, starts with a fast HTTP client.
Makes browser settings available
Browser waits need it in Standard mode. A screenshot switches a browser on by itself. See browser waits.
Blocks heavy resources by default
In a browser run, images, CSS, fonts, ads and tracker scripts are blocked by default so the page loads faster. Set block_resources or block_ads to false to load them.
Adds 5 credits
A datacenter browser request costs 10 credits. A residential browser request costs 15.

When to use it

Use it when

  • The first HTML has an empty container and the records arrive after scripts run.
  • You need to wait for an element that scripts add.
  • You need the mobile layout a browser renders. Add device_type=mobile.

Leave it out when

  • The data is already in the HTML a plain request returns. That request costs 5 credits.
  • You use Auto mode. Leave render_js out, because Auto decides between HTTP and browser itself.

How to set it

  • render_js

    true or false

    Standard mode only. The default is false.

  • block_resources

    true or false

    Browser runs only. The default is true. A screenshot turns it off.

  • block_ads

    true or false

    Browser runs only. The default is true. Independent of block_resources.

  • device_type

    desktop or mobile

    The emulated viewport and user agent. The default is desktop.

Limits to plan for

  • A browser job on a hard site can take longer than the 120 second sync limit and fail. Send those jobs as async requests.
  • Rendering does not sign in to a site, and the API has no parameters to click, scroll or type.
  • A page the site delivered is charged even when it is an error page or not the content you expected.

Other features

Start with a plain request. Add browser, routing or waiting settings only when the page needs them.

Try JavaScript rendering on your page

Paste a page URL into the Playground and see exactly what ScrapeDrive returns.

Start for freeOpen the Playground

500 credits after you confirm your email. No card.