How does regex work in JavaScript?

Related questions

1. What is regular expression JavaScript?
2. What is ?: In regex?
3. What does * mean in regular expression?
4. What does \b mean in regex?
5. Why is regex important?
6. What is S in regex?
7. What does \d mean in regex?
8. How do you escape in regex?
9. What is regex pattern?
10. Why regex is used?

Tags

1. #match
2. #string
3. #position
4. #pattern
5. #search
6. #regular
7. #methods
8. #method
9. #returns
10. #replaced
11. #javascript
12. #often
13. #expressions
14. #expression
15. #replace
16. #where
17. #modified