The Vector Tile extension for GeoServer is a popular way to generate tiles for use in MapBox.GL or OpenLayers.

The MBStyle extension is a great addition to this workflow, enabling the same styling for both client side and server side.

See also:

• https://github.com/geoserver/geoserver/wiki/GSIP-184
• https://osgeo-org.atlassian.net/browse/GEOS-9523

Checklist

For all pull requests:

• Confirm you have read the contribution guidelines
• You have sent a Contribution Licence Agreement (CLA) as necessary (not required for small changes, e.g., fixing typos in documentation)
• Make sure the first PR targets the master branch, eventual backports will be managed later. This can be ignored if the PR is fixing an issue that only happens in a specific branch, but not in newer ones.

The following are required only for core and extension modules (they are welcomed, but not required, for community modules):

• There is a ticket in Jira describing the issue/improvement/feature (a notable exemptions is, changes not visible to end users)
• Commit message must be in the form "[GEOS-XYZW] Title of the Jira ticket" (using GSIP here)
• The pull request contains changes related to a single objective. If multiple focuses cannot be avoided, each one is in its own commit and has a separate ticket describing it.
• This PR passes all existing unit tests (test results will be reported by travis-ci after opening this PR)
• This PR passes the QA checks (QA checks results will be reported by travis-ci after opening this PR)
• Commits changing the UI, existing user workflows, or adding new functionality, need to include documentation updates (screenshots, text)

Submitting the PR does not require you to check all items, but by the time it gets merged, they should be either satisfied or inapplicable.