order of events

Hi everyone, 

 

I'm trying to make the firing of a simple HTML success message reliable
cross browser/cross screen reader using toastr.js.

 

It's in the context of a really lumpy CRM product in which script
execution/network performance/event timings/redundant post requests are
influential on whether screen readers announce the insertion of a text node
within a <div> with aria-live='assertive' and role='alert'. 

 

Is there anything out there that specifies what order these 'event's fire in
or defines a contract between DOM + accessibility API + screen reader etc.?
Thus far, I have 3 different behaviours across 5 versions of a popular
screen reader  . 


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