Add functionality to cancel data loading #47
Merged
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This PR addresses "Map Data checkbox: perhaps use toggle slider instead" issue mentioned in the openstreetmap/openstreetmap-website#4931 and openstreetmap/openstreetmap-website#5009 (comment). It is continuation of #38.
Currently
asynchronously loading datahas no functionality to be canceled. Therefore, if user starts loading big amount of data and in the middle of the process decides to cancel it (even ifremoving each layerwas called), it will load all elements asynchronously (and only after that will begin to remove all the elements).This PR adds functionality to cancel asynchronous loading/removing in the middle of the process.
Was manually tested in the openstreetmap/openstreetmap-website#5009
Connected to the PR openstreetmap/openstreetmap-website#5009