# Getting Started
## Installation
```
npm install @accesslint/core
```
## Browser usage
Add the IIFE build to your page with a script tag:
```
```
If you’re using a bundler (Vite, webpack, etc.), you can import the ES module directly:
```
import { runAudit } from "@accesslint/core";
const result = runAudit(document);
```
## Headless browser (Playwright)
```
import { chromium } from "playwright";
const browser = await chromium.launch();
const page = await browser.newPage();
await page.goto("https://example.com");
// Inject the IIFE build
await page.addScriptTag({ path: "node_modules/@accesslint/core/dist/index.iife.js" });
const violations = await page.evaluate(() => {
return window.AccessLint.runAudit(document).violations.map((v) => ({
ruleId: v.ruleId,
message: v.message,
selector: v.selector,
impact: v.impact,
}));
});
console.log(violations);
await browser.close();
```
## Server-side DOM (happy-dom)
```
import { Window } from "happy-dom";
import { runAudit } from "@accesslint/core";
const window = new Window();
window.document.write(`
Test
`);
const result = runAudit(window.document);
// result.violations → [{ ruleId: "accesslint-011", message: "Images must have alternate text..." }]
```
## Configuration
Disable specific rules:
```
import { configureRules, runAudit } from "@accesslint/core";
configureRules({ disabled: ["accesslint-033"] }); // disable heading-order
const result = runAudit(document);
```
## What’s next
- [API Reference](/content/core/docs/api-reference/index.html) — full function and type documentation
- [Rules](/content/core/docs/rules/index.html) — all rules with WCAG mapping
- [Benchmarks](/content/core/benches/index.html) — performance and accuracy data