What HTTP status codes count as success in jQuery.

问题:

The documentation doesn't seem to specify exactly what is meant by 'success' in jQuery.ajax. Is it any 2xx code? Only 200?

回答1:

From the source code:

if ( status >= 200 && status < 300 || status === 304 ) {

So any 2xx and under special circumstances 304 as well. 304 has some extra handling though, check the source for more info.

回答2:

You'll find this in the done callback. A success is any status greater than or equal to 200 and less than 300. A notmodified (304) is also viewed as a success.