=[xhr]

Hi

 

In the specification for XMLHttpRequest you posted a "warning" about using
async=false which indicates that it is the intention to eventually remove
this feature due to "detrimental effects to the user experience" when in a
document environment.

 

I understand that synchronous events retrieving data can, if not managed
properly in the code, cause delays to the flow of the parsing and display of
the document. This may, if the programming practices are poor, be
extrapolated to be "detrimental to the users experience", however there are
times when there is a need to have data retrieved and passed synchronously
when dealing with applications.

 

In business application development there will always be the situation of
the client needing to manipulate the display based on actions that retrieve
data or on previously retrieved data. In these cases it is necessary for the
data retrieval to be synchronous.

 

If the document/form has to be resubmitted in full each time a client-side
action is taken or the client needs to retrieve data to decide what action
to take, then the user experience is definitely affected detrimentally as
the entire document needs to be uploaded, downloaded, parsed and displayed
again. Further there is the unnecessary need to retain instances of
variables describing the client-side environment on the server-side.
Variables which are not necessary for processing and should be handled by
the client.

 

For this reason I wonder why it would be necessary to remove such a useful
tool.  

 

I don't claim to be the expert on programming or technical specification,
perhaps I've missed something in the specification and I am more than happy
to be shown better ways to manage the development of our business
applications.  It just seems to me that deciding the user's experience is
detrimentally affected by the possibility of some developers having poor
programming practices seems to be a fairly blinkered approach to the
development process of such fantastic tools as XMLHttpRequest .

 

I would welcome discussion or advice on this topic .

 

Thanks for your time in reading this

 

Paul Bellamy

(Director)

Pacific West Data Pty Ltd

Ph: +61-412-754-052

www.pacificwestdata.com <http://www.pacificwestdata.com/>