The playground is a place where users can explore GopherJS without needing to install anything, or to share code with others. Our motivation should be that a potential user could easily be turned of by a bad experience here.

A secondary motivation is making the playground usable for other projects, such as in the GopherJS book, a GopherJS codewalk, or custom interactive environments using other packages.

To update the entire playground environment, run the update.sh script. It will pull the latest gopherjs compiler, rebuild and copy the standard library into the pkg directory, and build the playground.

Working on the application itself is made easier by using the SRVi utility to rebuild and serve the playground every time you refresh the browser.

go get -u github.com/ajhager/srvi
srvi -index index.html -endpoint playground.js playground.go