[OpenStreetMap] #5108: data layer easily overloads the browser after clicking a big feature

[OpenStreetMap]

#5108: data layer easily overloads the browser after clicking a big feature
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 Reporter:  aseerel4c26  |      Owner:  rails-dev@…
     Type:  defect       |     Status:  new
 Priority:  minor        |  Milestone:
Component:  website      |    Version:
 Keywords:  datalayer    |
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 After clicking a big feature (e.g. a landuse) the map automatically zooms
 out to fully show this feature. Well, okay, accepted. But the problem is
 that after this move the data layer updates and loads data again. If the
 current area is a densely mapped one, then the returned data quickly gets
 muuuuch leading to browser hangs.

 I would like to ''have an option to only fetch data ONCE!''  UI suggestion
 for the sidebar:

 *    [ ] Map Notes (<a href="$get that data" title="just fetch
 once">once</a>)
 *    [ ] Map Data (<a href="$get that data" title="just fetch
 once">once</a>)

 I simulated this by blocking /api/0.6/map?bbox= via AdBlock after the
 first load. That was really fine. Just like I would like to have it.

 That would also avoid the problem that if the left sidebar was not active
 already, then currently after clicking a feature in the data layer the
 left sidebar pops in, leading to a smaller map viewport, leading to
 another data query at /api/0.6/map?bbox= . Which causes render work again.

 That would also avoid the problem that currently the data layer state is
 remembered in the _osm_location cookie which, again, easily will hang your
 browser if you (even in another tab) go to a densely mapped area and zoom
 out while forgetting that data layer is still on (unexpectedly).
 [https://wiki.openstreetmap.org/w/index.php?title=User:Aseerel4c26/osm.org_UI_fixes_by_JS
 I have switched off] this cookie remembering "feature" for notes and data
 completely, as it was annoying to me.

 That would also need one click less - for turning the data layer off again
 if you want to continue to do something else.

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Ticket URL: <https://trac.openstreetmap.org/ticket/5108>
OpenStreetMap <http://www.openstreetmap.org/>
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