JavaScript Debugging Tips and Tricks @CSharpcorner Delhi Chapter - 5th Sep 2015. We discussed the common pitfalls every JavaScript Developer get into and how to debug those mis-takes!

1. C# Corner - Delhi Chapter 5th Sep 2015

2. < About me />
Sunny Sharma
• Trainer / Author / Speaker
• corp.sunnykumar@gmail.com
• Twitter: @sunny_delhi

5. Undefined Variable(s)

6. Misspelling

7. Case Sensitivity Issues

8. Missing / Mixed Quotes

9. Incorrect Number of Closing Braces

10. Incorrect Number of Closing Parenthesis

11. Using Method as a Property

12. Missing “+” during concatenation

13. NaN

14. Using Equals (=) Rather than Equality (==)

15. Debugging

16. alert();

17. console.log(“Hey!”);

18. try / catch / finally

19. Sequential Uncommenting
Steps:
• Comment all your code
• Uncomment first block of code (function)
• Test if works fine
• Uncomment next block of code
• Test if still works fine
• Carry on till you reach the end OR find the buggy line of code!
• Boring, right?

20. Developer Tools

21. Developer Tools - Common Terms
o Console
o Breakpoint
o Step In
o Step Over
o Step out
o Call Stack
o Watch

22. Play / Pause
script execution
Step Over Step Out
Step In Disable
Breakpoints
Pause on
Exceptions
Developer Tools - Common Terms

23. Thank You!
