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reading-notes

HTML

Tables

tag purpose
<table> used to create a table.
<tr> indicate the start of each row stands for table row.
<td> cell of a table stands for table data.
<th> epresent the heading for either a column or a row stands for table heading
<thead> The headings of the table should sit inside the this element
<tbody> The body should sit inside the this element.
<tfoot> The footer belongs inside the this element.

JavaScript

CREATING OBJECTS USING LITERAL NOTATION


var hotel = {} 
hotel .name= 'Quay'; 
hotel .rooms = 40;
hotel.booked = 25;
hotel.checkAvailabil ity =function() {
  return this.rooms - this.booked; 
};



var hotel = { 
    name: 'Quay' , 
    rooms: 40, 
    booked: 25, 
    checkAvailability: function() { 
        return this.rooms - this.booked; 
    } 
};

CREATING OBJECTS USING CONSTRUCTOR SYNTAX


var hotel = new Object(); 
hotel.name= 'Park'; 
hotel.rooms = 120; 
hotel .booked = 77; 
hotel .checkAvailability = function() {
return this.rooms - this.booked;
};



function Hotel(name, rooms, booked) { 
    this.name = name; 
    this.rooms = rooms; 
    this.booked = booked; 
    this.checkAvailability = function() 
    return this.rooms - this.booked; 
    } ; 
var quayHotel =new Hotel('Quay', 40, 25); 
var parkHotel =new Hotel('Park', 120, 77);

Note : this keyword is used instead of the object name to indicate that the property or method belongs to the object that this function creates

ARRAYS IN AN OBJECT

the property of any object can hold an array

OBJECT IN AN ARRAY

the value of any element in an array can be an object

WHAT ARE BUILT-IN OBJECTS

Browsers come with a set of built-in objects that represent things like the browser window and the current web page shown in that window. These built-in objects act like a toolkit for creating interactive web pages. As soon as a web page has loaded into the browser, these objects are available to use in your scripts. You access their properties or methods using dot notation, just like you would access the properties or methods of an object you had written yourself