The HyperText Transfer Protocol (HTTP)
410 Gone client error response code indicates that access to the target resource is no longer available at the origin server and that this condition is likely to be permanent.
If you don't know whether this condition is temporary or permanent, a
404 status code should be used instead.
Note: A 410 response is cacheable by default.
|RFC 7231, section 6.5.9: 410 Gone||Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content|
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The information shown below has been pulled from MDN's GitHub (https://github.com/mdn/browser-compat-data).