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JavaScript objects and functions
This document introduces JavaScript objects and functions. It discusses the different types of objects in JavaScript like primitive values, wrapper objects, built-in objects, and host objects. It also covers function scope, the this keyword, constructors, prototypes, and inheritance. Functions are introduced as statements, expressions, and constructors. The this keyword is explained in the context of global, function, object methods, constructors, call, apply, and bind.
JavaScript objects and functions
- 2. JAVASCRIPT OBJECTS &FUNCTIONS Victor Perez
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- 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 )
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- 7. CREATE ⁄ OBJECTS ● literal ● constructor ● Object.create
- 8. CONSTRUCTOR ⁄ OBJECTS ● Object.constructor
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- 10. INTRODUCTION ⁄ PROTOTYPE ● Inheritance ● Any object ● Prototype chain ● Read inheritance ● Write own property
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- 13. PROTOTYPE ⁄ OBJECTS ● Object.create
- 14. PROTOTYPE ⁄ OBJECTS ● Object constructor
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- 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
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- 20. THIS ⁄ GLOBALCONTEXT ● Global object ● window in the browser
- 21. THIS ⁄ FUNCTIONCONTEXT ● non strict ○ Global object ● strict mode ○ undefined
- 22. ⁄ OBJECT METHODTHIS ● 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
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