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Asynchronous data fetch from server is mainly reliable in my project which currently uses a "localhost" server. At times though the XMLHttpRequest onreadystate event does not fire and I am suspecting this is due to javascript code still executing when the fetched data becomes available.
Summary of process:
user click onclick code starts XMLHttpRequest object initialised for asynchronous fetch. onclick clean-up code continues onclick code ends

I am suspecting that when the amount of "onclick clean-up code" is larger (eg a report being output), then the XMLHttpRequest onreadystate event is somehow inhibited.

Thank you for any comments.

I am vaguely aware that "yield" has become part of later javascript specifications. Would this help.

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Last Post by ShawnCplus
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Might want to actually show your code, explaining it helps but seeing your code is much more helpful. And the yield operator is used for generator-iterators not AJAX.

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