➔ GopherJS v1.21.0 - Go 1.21.13 Support
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GopherJS v1.21.0 was published on June 26, 2026, and moves the project to Go 1.21.13 support. The most important change is the compiler and runtime update for Go 1.21, with matching work across builtins, reflect, slices, maps, unsafe handling, testing, and native overrides. This is a stable release, not a prerelease.