Modules
Intermediate⏱ 8 min read

Web Application Testing

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Web application testing validates functionality, performance, security, and compatibility of browser-based applications. It is one of the most complex domains due to the diversity of browsers, devices, network conditions, and user interactions.

◈Key Points

  • Cross-browser testing: test on Chrome, Firefox, Safari, and Edge at minimum — behaviour diverges.
  • Responsive design testing: test on mobile viewports, not just desktop — use BrowserStack or real devices.
  • Performance: Core Web Vitals (LCP, INP, CLS) are measurable and directly impact user experience and SEO.
  • Security: OWASP Top 10 for web — SQL injection, XSS, CSRF, broken authentication are the critical checks.
  • Accessibility: WCAG 2.1 AA compliance is the legal baseline in most jurisdictions.
⚡ Expert Pro Tip

Always test with network throttling (3G simulation). A feature that works perfectly on a fast corporate network may be unusable for a user on a mobile connection.