Accessibility - LangChain in Production

Learn how to make LangChain applications accessible to all users, including those with disabilities

♿ Accessibility Overview

Accessibility ensures everyone can use LangChain systems. This guide covers standards, design patterns, and testing for accessible applications.

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🏛️ Accessibility Standards

• Follow WCAG (Web Content Accessibility Guidelines)
• Use semantic HTML and ARIA attributes
• Ensure keyboard and screen reader support

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🧑‍💻 Accessible Design Patterns

• High-contrast themes and scalable fonts
• Clear navigation and focus indicators
• Alt text for images and icons

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🧪 Accessibility Testing

• Test with screen readers (NVDA, VoiceOver)
• Use automated tools (axe, Lighthouse)
• Conduct user testing with diverse groups

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🧩 Example: Accessible FastAPI Endpoint

from fastapi import FastAPI

app = FastAPI()

@app.get("/accessible")
def accessible():
    return {"message": "This endpoint is accessible."}

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🔗 Next Steps

• Internationalization
• Testing Patterns
• Error Handling

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Key Accessibility Takeaways:

• Follow accessibility standards and guidelines
• Design for diverse user needs
• Test with real users and tools
• Continuously improve accessibility
• Make inclusion a core principle