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World desk5 min

How to Find Accessibility Issues While You Code

A practical workflow for finding accessibility issues as you build: lint source, inspect rendered pages, integrate checks into review, and manually test real interactions.
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Find accessibility issues early by combining source-level linting, checks of rendered pages, automated checks in your normal build and review process, and manual testing of real interactions. No single scan proves a site is accessible: use each finding to inspect, fix, and retest the experience it affects.

Build accessibility checks into the coding loop

Accessibility defects are easier to address when you look for them as you implement a feature, rather than treating testing as a final launch gate. A practical loop has four layers: inspect source patterns, evaluate the rendered interface, run checks through the project’s usual build or review workflow, and manually try the experience.

  1. While editing: use a linter where your framework and language support it to catch some source-level patterns.
  2. After rendering: evaluate the page or component in a browser, where you can inspect what the browser actually presents.
  3. During build and review: make automated checks part of the development workflow so findings surface before release.
  4. For behavior and meaning: manually review the interface, including relevant keyboard and assistive-technology use.
  5. After a fix: inspect the changed experience again and rerun the checks that apply.

This sequence is a practical synthesis, not a guarantee that any particular tool or order will catch every defect. W3C/WAI describes evaluation tools as varying in scope and method, while Digital.gov cautions that automated checks cannot guarantee accessibility.

Catch source-level issues before the page is rendered

For React and JSX

eslint-plugin-jsx-a11y statically evaluates JSX and can flag some source patterns during development. It is useful as an early warning layer: it can point to code worth reviewing before you open the page.

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Static checks do not evaluate the final rendered HTML. The project maintainers describe the plugin as one step in a larger testing process and recommend testing with assistive technology. Treat lint output as a prompt to investigate, not a pass/fail verdict on the finished interface.

For IDE and CI workflows

W3C/WAI lists axe DevTools Linter for supported files in IDE and CI/CD workflows. Its directory entry lists file types including React JavaScript, JSX and TSX, Vue, Angular component HTML, HTML, and Markdown. Support can change, so check the current W3C/WAI evaluation tools directory for the file types and terms that apply to your project.

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Check the rendered page, not just the source

Source and rendered-page checks examine different representations of your work. A browser evaluation can inspect the interface after the application has rendered, which matters when content or controls are generated or changed at runtime.

W3C/WAI lists the axe DevTools Extension as an in-browser accessibility evaluation tool. A browser scan can help identify candidates for repair, but automated findings cover only what the tool can evaluate. A clean scan does not establish that a page is accessible or that its interactions make sense to users.

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Put checks where your team already builds and reviews

Automated checks are more useful when they run as part of normal development rather than as a one-time audit. Digital.gov recommends integrating automated checks into development and names axe-core, jsx-a11y, Lighthouse Audits, and AccessLint as examples. Select checks that fit your stack and review process; the named examples are not interchangeable and do not replace manual evaluation.

Choose a tool by asking four questions:

  • Where does it run? In source editing or an IDE, in a browser, or in CI.
  • What does it inspect? Static code, a rendered page or component, or a broader site.
  • How does it evaluate? Automatically, with human prompts or simulation, or through manual testing.
  • Does it support your project? Confirm current language, framework, file-type, and workflow support in the tool’s documentation.

W3C/WAI notes that evaluation tools vary in whether they cover one page or a whole site and whether they support automated, manual, or simulated evaluation. W3C’s ACT overview also recognizes automated, semi-automated, and manual testing. Match the tool’s scope to the question you need answered: a component check cannot stand in for a site-wide review.

Manually test the experience behind the finding

Some accessibility questions require judgment about context, behavior, and whether information is understandable. Use an automated finding to locate something to inspect, then try the relevant task yourself. Check the interaction in context and, where relevant to your product, test with assistive technology. W3C/WAI identifies manual evaluation as part of the available methods, and the JSX linter maintainers explicitly recommend assistive-technology testing.

For a control or flow you changed, review the actual rendered experience, not only whether a rule-based scan reports an issue. Decide whether the information and interaction work for the task, make a focused change, and check again.

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Or skip the browser setup

If you need a clean screenshot of a page while checking a rendered state, ScreenshotNeo is a website screenshot API and MCP server. It can capture a URL as PNG, JPEG, WebP, or PDF; it is a capture tool, not an accessibility evaluator, so it does not replace linting, accessibility scans, or manual testing. Its one-call API can return a page capture:

curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webp

See the ScreenshotNeo API documentation for request options. ScreenshotNeo removes cookie and consent banners, newsletter popups, and chat widgets before capture; each step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and responses indicate the page verdict and billing status. Its MCP server offers screenshot and PDF tools for AI agents. The free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000 screenshots. Sign up free for 1,000 screenshots a month with no card.

Troubleshoot misleading or incomplete results

  • A linter reports no issues, but the page still seems wrong: source linting covers some JSX patterns, not the final rendered output. Inspect the page in a browser and manually test the relevant behavior.
  • A browser scan finds nothing: automated checks cannot guarantee accessibility. Review the task and context manually, and use assistive technology where relevant.
  • A tool does not support your file or framework: check its current support list and choose another evaluation method for that layer; do not assume support from a similar language or framework.
  • A component looks fine in isolation but fails in the full flow: match evaluation scope to the issue. A component check and a page or site evaluation answer different questions.
  • A reported issue seems uncertain: treat the result as a candidate, inspect the rendered experience, and decide whether it affects the user task before changing code.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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