jsslint-wasm

A browser / Node.js WASM build of the JSS style checker — a linter for LaTeX / Sweave / R Markdown manuscripts (.tex/.ltx/.Rnw/.Rmd + .bib) submitted to the Journal of Statistical Software (JSS).

It runs entirely client-side: no network access is linked into this package at all (not even behind a flag), so manuscripts never leave the machine — by construction. This is the engine behind the in-browser checker and the project's VS Code extension.

Install

npm install jsslint-wasm

Usage

Three exports, all taking the same request object (camelCase keys) and throwing on a malformed request or unparseable input:

import { render, fix, analyze } from "jsslint-wasm";

// Lint and render a report string:
const report = render({
  files: [["paper.tex", texSource], ["refs.bib", bibSource]],
  output: "json",           // "terminal" | "json" | "sarif" | "html"
  mode: "reviewer",         // "author" | "reviewer"
  ignoreRules: "JSS-SRC-001,JSS-MARKUP-001",
  minConfidence: "medium",  // "low" | "medium" | "high"
  failOn: "error",          // "error" | "warning" | "info"
});

// Apply every safe auto-fix in memory; returns [path, fixedContents]
// pairs for the files that changed (`output` is ignored):
const changed = fix({ files: [["paper.tex", texSource]] });

// Structured violations, each with its fix payload when one exists
// ({start, end, replacement, description} character offsets) — what the
// VS Code extension's per-diagnostic quick fixes are built on:
const violations = analyze({ files: [["paper.tex", texSource]] });

files is an array of [path, contents] pairs; every field except files is optional. There is no .jss-lint.toml filesystem lookup on this target (no real filesystem in WASM) — pass any overrides explicitly. Note that render(output: "json") reports fix: null per violation by design (byte parity with the Python JSON contract) — use analyze() when you need the fix payloads.

The package is built with wasm-pack; the default export targets bundlers (webpack/vite/rollup) and needs no manual init step. See rust/README.md for the Node (--target nodejs) variant and build instructions, and the project README for the full rule catalogue.

License

MIT.