axe-core Accessibility Testing Engine for Automated Web UI Auditing

axe-core is the industry-standard accessibility testing engine by Deque Systems that automatically detects WCAG 2.0, 2.1, and 2.2 violations in web interfaces. It integrates into any existing test framework — Playwright, Cypress, Selenium, Jest — to catch accessibility issues during development rather than after deployment.

Installation

Use the upstream install or setup path that matches your environment:

• npm install axe-core --save-dev
• npm run build -- --lang=nl

Requirements and caveats from upstream:

• Automated accessibility testing is a huge timesaver, it doesn't require special expertise, and it allows teams to focus expert resources on the accessibility issues that really need them. Unfortunately, most accessibi...
• Axe can be built using your local language. To do so, a localization file must be added to the ./locales directory. This file must be named in the following manner: <langcode>.json. To build axe using this locale, ins...
• Additionally, locale can be applied at runtime by passing a locale object to axe.configure(). The locale object must be of the same shape as existing locales in the ./locales directory. For example:

Basic usage or getting-started notes:

• First download the package:

• console

• Now include the javascript file in each of your iframes in your fixtures or test systems:

• Source: https://github.com/dequelabs/axe-core

• Extracted from upstream docs: https://raw.githubusercontent.com/dequelabs/axe-core/HEAD/README.md

Source

• Agent Skill Exchange