JavaScript debugging and testing
JavaScript debugging, Chrome DevTools, testing, and code quality
Learn JavaScript debugging, Chrome DevTools, breakpoints, console workflows, automated testing with Mocha, BDD, coding style, comments, polyfills, and transpilers.
Debugging, testing, and quality lessons
Developer console basics
Open browser developer tools, read JavaScript errors, inspect console output, and start diagnosing scripts.
Outcome: Use the browser console as the first debugging surface for JavaScript code.
- JavaScript DevTools
- browser console JavaScript
- JavaScript errors
Debugging in Chrome
Set breakpoints, step through code, inspect scopes, pause with debugger, and trace execution in Chrome DevTools.
Outcome: Debug JavaScript behavior without relying only on console logging.
- JavaScript debugging
- Chrome DevTools JavaScript
- JavaScript breakpoints
Coding style
Write readable JavaScript with consistent formatting, names, structure, and team-friendly conventions.
Outcome: Make JavaScript code easier to review, maintain, and debug.
- JavaScript coding style
- JavaScript best practices
- clean JavaScript
Comments and readable code
Use comments to explain intent, tradeoffs, and non-obvious decisions without restating simple code.
Outcome: Document JavaScript code where it helps future maintenance.
- JavaScript comments
- readable JavaScript
- code readability
Automated testing with Mocha
Learn BDD, specs, assertions, Mocha test flow, and automated checks for JavaScript functions.
Outcome: Write repeatable tests instead of manually rechecking every code path.
- JavaScript testing
- Mocha JavaScript
- BDD JavaScript
Polyfills and transpilers
Understand compatibility workflows with Babel-style transpilation and polyfills for modern JavaScript features.
Outcome: Ship modern JavaScript while supporting older browser environments.
- JavaScript polyfills
- JavaScript transpiler
- Babel JavaScript