cherry-pick caching fix #8389
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cherry-pick caching fix #8389
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Recent pricing changes introduced a `sku=` query parameter that changes with every map load. This defeats the browser's ability to cache these tiles. We're working around that by implementing our own caching with the new `Cache` api. - skips caching tiles that expire soon - only caches mapbox tiles (no 3rd party tiles, styles, etc because the browser should cache these fine) - does not work in IE, Safari Browser tests can be found in debug/cache_api.html mapboxgl.clearStorage added to provide a way to clear the cache.
This was throwing errors in browsers that don't support the cache api but wasn't previously noticed because it was not breaking anything.
mourner
approved these changes
Jun 24, 2019
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