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Need to implement hot reloading support in Dash for R #125
Description
Dash for Python offers a lovely "hot-reloading" feature, as described in plotly/dash#66, plotly/dash#362, and plotly/dash-renderer#73. Supporting this as in the Python implementation would require
- creating a hash at app initialization, and regenerating it on file change
- adding a route to serve the hash
- front-end hot reloading
- back-end hot reloading (reload the app by restarting the
fierysession) - adding parameters for the dev tools UI:
dev_tools_hot_reload,dev_tools_hot_reload_interval,dev_tools_hot_reload_watch_interval,dev_tools_silence_routes_logging
On the Python side, we use the Flask debug reloader to reset the hash. fiery doesn't have native support for something like this feature, but it does allow "Custom Events" which can be manipulated to serve a similar purpose.
State-preserving hot reloading would be really nice to have, as noted in plotly/dash#460, but it has not been implemented in Dash for Python yet either.
Activity
rpkyle commentedon Sep 5, 2019
@Stalkcomrade
rpkyle commentedon Sep 13, 2019
Following discussions with @alexcjohnson, the PR to address this issue may be split into two parts:
Right now the following elements are working in some capacity:
_reload-hashchatter is omitted from logs and support fordev_tools_silence_routes_loggingis possiblefieryserver, for full reloading of the app (e.g. ifapp.Ris modified, or non-CSS files are added)rpkyle commentedon Nov 1, 2019
@StalkComrade This feature is ready for use and available in the
devbranch if you'd like to test it out before the next version of the package is released! 🙂firasm commentedon Dec 3, 2019
Thanks @rpkyle, just to confirm is it
to get the dev version right?
rpkyle commentedon Dec 5, 2019
Hi @firasm ! Apologies for not catching this question sooner, but yes, that's the right branch -- I'd suggest installing with the lines
The next release is imminent, and hopefully you'll be able to obtain the package from CRAN in the very near future. For now, ☝️ will do the trick 🙂
rpkyle commentedon Jan 7, 2020
🌶 reloading is now available in
master, closing issue.