JavaScript expands website functionality, enabling website owners to implement various interactive elements and create rich user interfaces. That’s why it is so popular and used on 97,6% of all websites on the web. Given the widespread use of the code, any modern on-page audit tool should be able to execute JavaScript and analyze JS content.
The tools powered by DataForSEO On-Page API v3 can do it.
Answering the question from the title — yes, our bot can crawl JavaScript websites. We integrated the Chromium project library, which makes our crawler a close imitation of Google. We regularly update the Chrome Version used for rendering to the latest available.
To crawl JavaScript, add the enable_javascript field to the On-Page API Task POST body and set it to true. That will instruct our crawler to execute JavaScript when it’s spotted on the crawled pages.
Example:
[
{
"target": "dataforseo.com",
"max_crawl_pages": 10,
"enable_javascript": true
}
]
Note: when enable_javascript is set to true, additional charges apply.
Learn more about the cost of tasks with this parameter in this help article.