Syntax highlighting and editing support for FSON live in the ffs-lang-tools monorepo. It also covers FFS-MD, the in-house Markdown dialect used in FFS component content and blog posts.
| Sub-project | Produces | For | Page |
|---|---|---|---|
vscode-fson | TextMate grammar + language config + a canonical formatter | VS Code | VS Code — FSON |
vscode-ffsmd | injection grammar + conservative formatter | VS Code | VS Code — FFS-MD |
highlightjs-fson | highlight.js language definition | the web (<pre>, code blocks) | highlight.js grammar |
highlightjs-ffsmd | highlight.js language definition | the web | highlight.js grammar |
Where to get them
- Visual Studio Marketplace — publisher Fedem. Search FSON or FFS-MD in the Extensions view, or
code --install-extension Fedem.vscode-fson. - Packaged files — the
.vsixfiles and the npm tarballs are on the Downloads page. Installing a downloaded.vsixis covered on Installing a .vsix. - npm — the highlight.js grammars publish as npm packages; see the highlight.js grammar page.
Single source of truth
Every grammar is derived from spec/ — the normative railroad grammar for FSON, the renderer header for FFS-MD — not from memory, and each is validated against a corpus of real files. When the FSON notation changes, the spec is re-copied and the grammars revised; the version only ever moves forward.
