This is a so called trivial script according to the free software restrictions introduced in the LibreJS article and also passes with flying green colors through the even stricter browser extension. The hack is that I implement a non-optimized Brainfuck interpreter within its confines via elaborate golfing!

As that is a minimized Turing-complete language, it means that you can actually use it as a runtime to work around these restrictions. Stay tuned for further demonstrations. See the generated program output below.