What are the specific circumstances in which the onerror and ontimeout properties are utilized? (regarding

When utilizing the XMLHttpRequest class to send payload data from a web client to a web server, I encounter some common errors that need to be handled...

  • REQUEST TIMEOUT (CONNECTION TIMEOUT)
  • 500, INTERNAL SERVER ERROR
  • 502, BAD GATEWAY
  • 503, SERVICE UNAVAILABLE

I am unsure about how to properly utilize the onstatechange, onerror, and ontimeout properties. Can onreadystatechange alone catch these errors?

If I need to use onerror or ontimeout, I would like to understand the distinctions between these handlers and onreadystatechange.

Answer №1

  • When the state of the xmlhttprequest object changes, the function onreadystatechange is activated, just like how onclick works.

  • The readystate is responsible for capturing the different states of the xmlhttprequest object, with five values representing the server response state.

  • Upon receiving a successful response from the server, the status code is returned, indicating issues such as 500 - INTERNAL SERVER ERROR.

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