Imagine I launched Google Chrome and its corresponding extension. The extension relies on the XmlHttpRequest object for functionality. However, upon starting the browser, I realized there is no internet connection available. In this scenario, what will the XHR return when there is no connection?
When using XHR, the onreadystatechange function may unexpectedly return a status of "0" instead of the expected values like "200" or "404". To handle this, you should verify the "readyState" property (which should be equal to 4) and the "status" property (which will be "0" if there is no internet connection).
Additionally, you can utilize the navigator.onLine property to determine the availability of an internet connection.
When the send() function is called, an error with code 101 (NETWORK_ERR) known as XMLHttpRequestException is thrown.
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