TypeScript (wasm)

@stix-rust/wasm — a portable WebAssembly build (wasm-bindgen) that runs in Node and the browser. The API is identical to @stix-rust/node; on the web target the module is initialized asynchronously first.

Install

npm install @stix-rust/wasm

From source instead: cd bindings/typescript-wasm && npm install && npm run build (Node target; npm run build:web produces the browser build.)

Worked example

import { Engine, ParseError, ValidationError } from "@stix-rust/wasm";

const engine = new Engine();

// 1. parse a pattern; the AST is a plain object
const pattern = engine.parsePattern("[ipv4-addr:value = '198.51.100.5']");
console.log(pattern.ast.expression);

// 2. import a bundle; iterate its objects
const bundle = engine.parseBundle(json);
console.log(bundle.objectCount(), [...bundle].map((o) => o.type));
bundle.object(99); // undefined when out of range

// 3. match — hit and miss
const result = engine.matchBundle(pattern, bundle);
console.log(result.matched, result.observations);
const miss = engine.parsePattern("[ipv4-addr:value = '203.0.113.9']");
console.assert(!engine.matchBundle(miss, bundle).matched);

// 4. custom type with a computed property
engine.registerType("x-acme-widget", (obj) => ({
  ...obj,
  risk_band: obj.risk_score > 80 ? "high" : "low",
}));
const banded = engine.parseBundle(widgetBundleJson);
const hit = engine.parsePattern("[x-acme-widget:risk_band = 'high']");
console.assert(engine.matchBundle(hit, banded).matched);

Errors

All extend StixError (which carries a .code). Hooks run at parseBundle time; throwing inside one rejects the object.

Notes

• Browser use: build with the web target and initialize the module before use (per wasm-pack’s --target web conventions); after init the API above is the same.
• Everything runs synchronously and single-threaded inside the wasm module — fine for the parse/import/match workload.