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ajaxxmlhttprequest

AJAX (XmlHttpRequest) timeout length by browser

I've been scouring the web trying to find a straight answer to this. Does anyone know the default timeout lengths for ajax request by browser? Also by version if it's changed?

Solution

  • I don't think browsers have a timeout for AJAX, there is only synchronous or asynchronous requests; synchronous - first freezes the JavaScript execution until the request returns, asynchronous - does not freeze JavaScript execution, it simply takes the request out of the execution flow, and if you have a callback function it will execute the the function in parallel with the running scripts (similar to a thread)

    **sync flow:**

running JS script
     |
    ajax
(wait for response)
     |
execute callback 
     |
running JS script




 **async flow:**

 running JS script
     |
    ajax  --------------------
     |                       |
 running JS script       execute callback