Table of Contents for
Speaking JavaScript

Version ebook / Retour

Cover image for bash Cookbook, 2nd Edition Speaking JavaScript by Axel Rauschmayer Published by O'Reilly Media, Inc., 2014
  1. Speaking JavaScript
  2. Cover
  3. Speaking JavaScript
  4. Praise for
  5. Preface
  6. I. JavaScript Quick Start
  7. 1. Basic JavaScript
  8. II. Background
  9. 2. Why JavaScript?
  10. 3. The Nature of JavaScript
  11. 4. How JavaScript Was Created
  12. 5. Standardization: ECMAScript
  13. 6. Historical JavaScript Milestones
  14. III. JavaScript in Depth
  15. 7. JavaScript’s Syntax
  16. 8. Values
  17. 9. Operators
  18. 10. Booleans
  19. 11. Numbers
  20. 12. Strings
  21. 13. Statements
  22. 14. Exception Handling
  23. 15. Functions
  24. 16. Variables: Scopes, Environments, and Closures
  25. 17. Objects and Inheritance
  26. 18. Arrays
  27. 19. Regular Expressions
  28. 20. Dates
  29. 21. Math
  30. 22. JSON
  31. 23. Standard Global Variables
  32. 24. Unicode and JavaScript
  33. 25. New in ECMAScript 5
  34. IV. Tips, Tools, and Libraries
  35. 26. A Meta Code Style Guide
  36. 27. Language Mechanisms for Debugging
  37. 28. Subclassing Built-ins
  38. 29. JSDoc: Generating API Documentation
  39. 30. Libraries
  40. 31. Module Systems and Package Managers
  41. 32. More Tools
  42. 33. What to Do Next
  43. Index
  44. About the Author
  45. Colophon
  46. Copyright

Chapter 27. Language Mechanisms for Debugging

The following three language constructs help with debugging. They should obviously be complemented by a proper debugger:

  • The debugger statement behaves like a breakpoint and launches the debugger.
  • console.log(x) logs the value x to the console of the JavaScript engine.
  • console.trace() prints a stack trace to the engine’s console.

The console API provides more debugging help and is documented in more detail in The Console API. Exception handling is explained in Chapter 14.