How to close the crawler from a RequestHandler?

The community members are discussing how to stop a scraper/crawler when certain conditions are met. The original poster wants to know if there is a way to stop the scraper from inside the RequestHandler, as the crawler.teardown() function cannot be executed from within the handler.

The comments suggest that instead of using await crawler.run(), the community member should use crawler.run() and then call teardown() when the condition or event is handled in their own code outside of the crawler. However, the issue is that the conditions are triggered in specific routes of a site, and the community members would like to have this functionality within the request handlers.

The community members also discuss how to stop the request handler flow if a certain condition is satisfied, such as if an element is not present. They wonder if a simple return; would suffice, as they don't return anything and just enqueue links.

The community members are looking for a way to avoid duplicate or redundant scrapes, and they wonder if there is a way to empty out the request queue, as this might stop the crawler when there is nothing left to scrape.

There is a reference to a previous discussion on Discord, but no explicitly