Regular expressions in JavaScript

Table of contents

1. Basics of regular expressions
   1. What are Regular expressions?
   2. JavaScript objects
   3. The basic comparison process
   4. Special characters and escaping
   5. Searching with flags
   6. Repetition
   7. Backtracking, greedy and lazy
   8. Character sets
   9. Alternation
   10. Grouping and capturing
   11. Catastrophic backtracking
   12. Preventing catastrophic backtracking
   13. Lookaround assertions
2. Unicode escape sequences
   1. The u flag and surrogate paired characters
   2. Unicode properties
   3. Combining diacritical marks
   4. Ligatures
   5. Words and word boundaries
   6. Emoji modifiers and Emoji sequences
   7. Internationalization
3. Methods in JavaScript
   1. Methods replace(), test() and search()
   2. Methods exec(), match() and matchAll()
4. Appendix A – Regex examples
5. Appendix B – Examples catastrophic backtracking