forkphorus

forkphorus.github.io

A JavaScript/TypeScript compiler for Scratch 2 and Scratch 3 projects. forkphorus is a fork of phosphorus.

Performance

Projects should, in general, run faster in forkphorus than in Scratch 3 and much faster than Scratch 2. Here's an unscientific benchmark of running quicksort on 200000 random items:

Environment	Min	Avg	Max
Forkphorus (sb3 compiler)	0.19	0.198	0.221
Scratch 3	11.043	11.2131	11.599
Scratch 2		17.55

(September 2019, Chrome 76)

Build Steps

Forkphorus is written in mostly TypeScript, which must be compiled to JavaScript to run in a browser.

• Install node.js and npm (npm is usually included with node)
• Automated way:
  • Run npm run watch in your terminal when in the repository.
  • Open any of the links output in the console.
  • VS Code Users: You can do this using Tasks: Command Pallet (Ctrl+Shift+P) -> "Run Build Task" -> "npm: watch" -> "TypeScript problems (Watch mode)". Other editors may have something similar.
• Manual way: (only if the first method didn't work)
  • Install dependencies by running npm install in the repository.
  • Run tsc -w to start the TypeScript compiler in watch mode.
  • Open index.html in your browser with a local HTTP server or a file:// URL.
• Edit TypeScript files in the src folder, and the compiler will automatically rebuild the output.
• Refresh to observe changes.

If for some reason you don't want to or can't do that, then you could edit phosphorus.dist.js directly instead.

License

Unless stated otherwise, files in this repository are MIT Licensed.