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Support policy
The CMS Design System team only provides support for the current version and the immediately preceding major version (for example, if version 18 is the latest, we support versions 18 and 17). The current major version receives minor updates, including non-breaking changes and bug fixes. The previous major version receives only critical and urgent bug fixes. We recommend that all teams upgrade to the current major version to get the best experience with the Design System. For versions older than the previous major version, we offer migration assistance, but no further updates will be released for these versions. We strongly recommend upgrading to the latest version as soon as possible after a new major release.
Browser support policy
The CMS Design System follows the 2% rule: we officially support any browser above 2% usage and the last 2 browsers versions for each browser as observed by analytics.usa.gov. Currently, the latest 2 versions of Chrome, Firefox, Safari, and Edge are supported.
The CMSDS is designed to be compatible with different operating systems and browser versions in order to provide a broad range of support. Progressive enhancement and graceful degredation methodologies are used to accomplish this.