mapbox-gl

✨ Features

• Add mapboxgl.prewarm() and mapboxgl.clearPrewarmedResources() methods to allow developers to optimize load times for their maps (#9391)
• Add index-of and slice expressions to search arrays and strings for the first occurrence of a specified value and return a section of the original array or string (#9450) (h/t lbutler)
• Correctly set RTL text plugin status if the plugin URL could not be loaded. This allows developers to add retry logic on network errors when loading the plugin (#9489)

🍏 Gestures

This release significantly refactors and improves gesture handling on desktop and mobile. Three new touch gestures have been added: two-finger swipe to adjust pitch, two-finger double-tap to zoom out, and tap then drag to adjust zoom with one finger (#9365). In addition, this release brings the following changes and bug fixes:

• It's now possible to interact with multiple maps on the same page at the same time (#9365)
• Fix map jump when releasing one finger after pinch zoom (#9136)
• Stop mousedown and touchstart from interrupting easeTo animations when interaction handlers are disabled (#8725)
• Stop mouse wheel from interrupting animations when map.scrollZoom is disabled (#9230)
• A camera change can no longer be prevented by disabling the interaction handler within the camera change event. Selectively prevent camera changes by listening to the mousedown or touchstart map event and calling .preventDefault() (#9365)
• Undocumented properties on the camera change events fired by the doubleClickZoom handler have been removed (#9365)

🐞 Improvements and bug fixes

• Line labels now have improved collision detection, with greater precision in placement, reduced memory footprint, better placement under pitched camera orientations (#9219)
• Fix GlyphManager continually re-requesting missing glyph ranges (#8027, fixed by #9375) (h/t oterral)
• Avoid throwing errors when calling certain popup methods before the popup element is created (#9433)
• Fix a bug where fill-extrusion features with colinear points were not returned by map.queryRenderedFeatures(...) (#9454)
• Fix a bug where using feature state on a large input could cause a stack overflow error (#9463)
• Fix exception when using background-pattern with data driven expressions (#9518, fixed by #9520)
• Fix a bug where UI popups were potentially leaking event listeners (#9498) (h/t mbell697)
• Fix a bug where the within expression would return inconsistent values for points on tile boundaries (#9411, #9428)
• Fix a bug where the within expression would incorrectly evaluate geometries that cross the antimeridian (#9440)
• Fix possible undefined exception on paint variable of style layer (#9437) (h/t mannnick24)
• Upgrade minimist to ^1.2.5 to get fix for security issue CVE-2020-7598 upstream (, fixed by ) (h/t )