Improvements and features

• 64-bit integer arithmetic and math/big ~10x performance improvement by @nevkontakte in #1082
• Support environments without process.argv by @tsavola in #1068
• Source maps: preserve position information for top-level variable declarations. by @nevkontakte in #1070
• Improve temporary file management in gopherjs test. by @nevkontakte in #1081

Bug fixes

• Fix two classes of "unreachable code" warnings in Firefox. by @nevkontakte in #1071
• sync/atomic: remove an unused type of code. by @nevkontakte in #1075
• Prevent event loop starvation by always scheduled goroutines. by @nevkontakte in #1079
• Fix two cases of incorrect stack unwinding after panic recovery. by @nevkontakte in #1084

New Contributors

• @tsavola made their first contribution in #1068
• @danielgtaylor made their first contribution in #1077

Full Changelog: 1.17.0+go1.17.1...1.17.1+go1.17.3

Go 1.17 is now supported by GopherJS!! See the upstream Go 1.17 release notes for details. Noteable exceptions/differences with GopherJS:

• The GopherJS toolchain has not been updated to support lazy module loading or version suffixes for gopherjs run
• Slice to array conversion is not supported for subslices of non-linear types (https://github.com/gopherjs/gopherjs/blob/daae65060a401d321b01fef0ae7fb535230f239c/compiler/prelude/prelude.go#L178-L183)
• Outstanding compiler bugs found during the 1.17 release cycle:
  • #1063
  • #1060

This release is tested against the Go 1.17.1 standard library, although all versions of Go 1.17.x are expected to work.

• Go Modules are fully supported by GopherJS! build, test and serve and other subcommands now work outside of GOPATH! 🎉
• Release tested against Go 1.16.7 and Node 12.
• It is now easier to install NodeJS dependencies for GopherJS. Simply run npm install in the root of the GopherJS working copy and all dependencies will be installed under node_modules.
• Several minor fixes in the GopherJS runtime, compiler and syscall/js. Thanks to @benma for fixing an issue when using GopherJS within a Chrome extension!

• Tested with Go 1.16.5
• Fully up to date support for the 'syscall/js' including IsNull, IsUndefined, IsNaN, Delete and Equal methods and correct panic types.
• Further fixes to the syscall package under MacOS/M1 (GOOS=darwin GOARCH=arm64).
• Fixed incorrect deferral handling triggered by JS exceptions.

• Tested with the latest go 1.16.4.
• Fixed build errors in the syscall package under GOOS=darwin.
• Fixed a panic in golang.org/x/crypto/chacha20poly1305 (although see a caveat).

• syscall/js: Added support for CopyBytesToGo() and CopyBytesToJS (thanks @paralin and @findleyr).
• Compiler: Fixed panics caused by untyped nils.
• Compiler: Print additional debugging information if a panic happens during compilation.
• Development: GOPHERJS_SKIP_VERSION_CHECK allows to use GopherJS with any Go version (no guarantees it'll work well! 😉)

GopherJS lives again! Now with Go 1.16 support!

This tags GopherJS 1.12-3 with the new tagging scheme.

This tag exists only to document the state of the Go 1.13 WIP branch, which was never released. Ultimately, we jumped to 1.16 for the next release.