Detect Search Crawlers via JavaScript

Question

I am wondering how would I go abouts in detecting search crawlers? The reason I ask is because I want to suppress certain JavaScript calls if the user agent is a bot.

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Answer 1

isTrusted property could help you.

The isTrusted read-only property of the Event interface is a Boolean that is true when the event was generated by a user action, and false when the event was created or modified by a script or dispatched via EventTarget.dispatchEvent().

eg:

isCrawler() {
  return event.isTrusted;
}

⚠ Note that IE isn't compatible.

Read more from doc: https://developer.mozilla.org/en-US/docs/Web/API/Event/isTrusted