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When zooming or panning, if we have tiles at alternate resolutions, those tiles are inserted in the DOM before the tiles at the target resolution. This means you should see blurry tiles instead of whitespace when panning (assuming you've already zoomed in a bit).
OpenLayers 3
Build it
Run make:
$ make
Run the examples
Run make (as above), then explore the demos/ directory with your web browser.
Run the examples in debug mode
Run the Plovr web server with:
$ make serve
Then, start a simple webserver, for example:
$ python -mSimpleHTTPServer
Explore the demos/ directory through this server, for example http://localhost:8000/demos/side-by-side/debug.html. You can turn off compilation by appending ?mode=RAW to the URL, for example http://localhost:8000/demos/side-by-side/debug.html?mode=RAW.
Note that appending ?mode=RAW doesn't work with file:// URLs, which is why you need to access the demos/ directory though a web server.
Run tests
Run the plovr web server (see above), and either open the test/ol.html file
in the browser (e.g. http://localhost:8000/test/ol.html), or run make test
on the console (headless testing with PhantomJS).
See also the test-specific readme.
Run the linter
First, install the Closure Linter. Then:
$ make lint