Web browser support
New and existing Forgejo web UI features that affect usability of Forgejo should rely on browser features and APIs available in both:
- Latest version of Firefox ESR
- Previous major version of Chromium
For example, forgejo/forgejo#8859 couldn't rely on the new closedBy property of HTMLDialogElement because it was re-implementing an existing significant feature (modal dialogs) and closedBy was not yet supported by Firefox ESR. So not implementing a compatible JS function would break the ability of users to close the dialog by clicking outside of it on a supported browser, which would have been considered a newly introduced bug in Forgejo v13.0.0.
The latest Firefox ESR version can be calculated differently:
- If pull request is proposed to be backported to stable branch of Forgejo, the latest Firefox ESR as of present day should be considered
- If pull request targets the next major Forgejo release, the latest Firefox ESR as of the day of that Forgejo release should be considered. Refer to Forgejo release schedule and Firefox release calendar to find the matching ESR version
New features that do not affect usability can rely on browser features up to Baseline of last year is acceptable.
Feature oldness and non-standard features
It's up to the contributor to work on additional support beyond the minimally required platforms as long as such compatibility doesn't introduce:
- Significant increase in complexity
- Additional dependencies (e.g. compatibility libraries)
However we do not welcome additional code that only exists to maintain compatibility with browser engines that have been completely officially discontinued, such as:
- MSHTML (Microsoft Internet Explorer)
- EdgeHTML (Microsoft Edge)
- Presto (Opera)
- KHTML
Vendor prefixes should be used strictly when necessarily. When a property is supported without vendor prefixes on the minimally required platforms, vendor-prefixed properties should not be used.