The JavaScript engine that powers Safari.

You can install JavaScriptCore with wapm:

wapm install -g jsc

You can run the jsc shell:

$ jsc
>>> function multiply(a, b) { return a * b; }
undefined
>>> multiply(10, 20)
200
>>> 0.1 + 0.2
0.30000000000000004
>>> Date();
Mon Apr 15 2019 19:05:43 GMT-c100 (UTC)
>>>

You will need Emscripten SDK (emsdk), Python, Ruby, and Ninja to build the php.wasm file.

Steps:

1. Setup emsdk (>= 1.38.11), see Installation Instructions
2. Run bash build.sh

Manual step-by-step instructions:

• install emscripten
• install python, ruby, ninja, etc.
• run ./build/gn/UpdateGN.sh to download latest gn.
• run ./Source/JavaScriptCore/DerivedSources/gen.sh to generate derived sources.

• install emscripten
• install python, ruby, ninja, etc.
• run build/gn/download.bat to download latest gn.exe.
• run Source/JavaScriptCore/DerivedSources/gen.bat to generate derived sources.

> ./build/gn/mac/gn gen out --args="target_os=\"wasm\""
> ninja -C out

> gn gen out --args="target_os=\"win\""
> ninja -C out