JavaScript presentation for 24/i about Objects and Functions

2. JAVASCRIPT
OBJECTS & FUNCTIONS
Victor Perez

3. / INTRODUCTION

4. OBJECTS ⁄
INTRODUCING
● string, number, boolean, null and undefined
● Wrapper objects: String, Number and Boolean
● Object, Function, Boolean, Error, EvalError, RangeError, ReferenceError, SyntaxError,
TypeError, URIError, Number, Math, Date, String, RegExp, Array and JSON
● Host objects
● no class inheritance
● prototype inheritance

5. FUNCTIONS ⁄
INTRODUCING
● Objects
● Function scope
● this and arguments
● constructor
● prototype
● return ( default: undefined )

6. / OBJECTS

7. CREATE ⁄
OBJECTS
● literal
● constructor
● Object.create

8. CONSTRUCTOR ⁄
OBJECTS
● Object.constructor

9. / PROTOTYPE

10. INTRODUCTION ⁄
PROTOTYPE
● Inheritance
● Any object
● Prototype chain
● Read inheritance
● Write own property

11. ⁄ EXAMPLE PROTOTYPE

12. ⁄ EXAMPLE PROTOTYPE

13. PROTOTYPE ⁄
OBJECTS
● Object.create

14. PROTOTYPE ⁄
OBJECTS
● Object constructor

15. / FUNCTIONS

16. STATEMENT ⁄
FUNCTIONS
● function statement

17. EXPRESSION ⁄
FUNCTIONS
● function expression
● The name is only available inside the
function

18. CONSTRUCTOR ⁄
FUNCTIONS
● Function constructor
○ eval
○ global scope

19. / THIS

20. THIS
⁄ GLOBAL CONTEXT
● Global object
● window in the browser

21. THIS
⁄ FUNCTION CONTEXT
● non strict
○ Global object
● strict mode
○ undefined

22. ⁄ OBJECT METHOD THIS
● Object of the method

23. ⁄ CONSTRUCTOR THIS
● Object of the new created object

24. ⁄ CALL & APPLY THIS
● First parameter will be bound to this
● call
● apply
● convert it to an object

25. ⁄ BIND THIS
● returns the same function where this is the same as the first parameter
● this can’t be changed

26. / JAVASCRIPT

27. / QUESTIONS?

28. THANKS