Dynamic importing of json file is not refreshing

Question

Running

Dynamic[Refresh[Import["foo.json"], UpdateInterval->1]]

or

json := Import["foo.json"]

then

Dynamic[Refresh[json, UpdateInterval -> 1]]

do not update as expected!

I can evaluate json manually and get the current json in the file, but if I change the contents of the file, the output of Dynamic remains static.

Is there a way to achieve this sort of thing?

Try Dynamic[Refresh[json, TrackedSymbols :> {}, UpdateInterval -> 1]] — Mike Honeychurch, Mar 16, 2015 at 21:51

m_goldberg · Accepted Answer · 2015-03-16 17:47:18Z

2

This can be done with Clock. The following will import foo.json every 5 seconds.

With[{update = 5},
  Dynamic[{foo = Import["~/Desktop/foo.json"], 
           Clock[{1, update, update}, update]}]]

answered Mar 16, 2015 at 17:41

m_goldberg

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$\begingroup$ This worked. Thanks! $\endgroup$
– epylar
Mar 16, 2015 at 19:56
$\begingroup$ But why is UpdateInterval not working? $\endgroup$
– VividD
Sep 14, 2015 at 16:01
$\begingroup$ The update interval of 5 sec. works as expected in the code I posted in this answer, so I don't understand what you asking? $\endgroup$
– m_goldberg
Sep 14, 2015 at 20:20

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