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HsinTzu Chen5,833 Points
Does send(null) had impact on asynchronous behavior?
I think the synchronous and asynchronous behaviors in first and second example is made by third argument in open method (true: asynchronous or false: synchronous).
However, there is also difference in send method first example (synchronous )-->
xhr.send(null) and second example (synchronous )-->
I am wondering if null argument has impact on asynchronous behavior? If not, does anyone knows why null argument is used? Many Thanks!