What is jQuery's ajax default timeout value? [duplicate]

Question

Does anyone know what the default jQuery ajax timeout value is?

Behest

It seems it is undefined and left for the specific implementation in the browser: #2507855 #3395260 – Delinquent

Answer 1

The default is 0 (technically it's undefined, but behaves as 0). This means no timeout in jQuery itself...if the browser has some timeout it's entirely possible you'll hit that.

Only when a timeout option is specified does jQuery even call setTimeout().

Sinistrality

my tests suggest erkmene, above, is actually right - the browser sets the timeout... – Paraselene

@Paraselene - the line number in the source has changed in recent versions, but the answer above is still correct, note the timeout > 0 check in jQuery itself: github.com/jquery/jquery/blob/master/src/ajax.js#L700 This isn't a question about raw setTimeout(myFunc,0);, it's about jQuery's .ajax() implementation when one's not specified. The default is still undefined, but behaves like 0 in checks as you can see here. The default for jQuery (what the question was asking) is still effectively 0. – Sinistrality

Sure - I just think most people care more about what the effective timeout is.... So the best answer would say "by default the timeout is set by the browser" - followed by a technical explanation of whys + hows... – Paraselene

Another thing to note is that jQuery AJAX timeout only works if the "async" setting is set to true, which is by default. – Exult