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PRESENTATION OVERVIEW

JavaScript

Advantages of JavaScript

Data types and variables

Operators

If-else statement and while loop

Functions and events

Cookies

Page Redirection

Dialog Box: Page Printing

JavaScript objects

Boolean Object

Error Handling

Validation and Animation

JAVASCRIPT

JavaScript is dynamic computer programming

language most commonly used as the part of web

pages and allows the client side script to interact

with the user. The ECMA-262 is the specification

defined as the standard version of the core

JavaScript language, and it is mainly designed for

creating the network-centric applications, then has

the open and cross platform. 

01

ADVANTAGES OF JAVASCRIPT

Less server interaction 

you can validate the user input before

sending the page off to the server

Increased interactivity

It act as a  interfaces 

02

DATA TYPES ANDVARIABLES

Allow to work with the three primitive data type such as

 1)Numbers

 2)Strings and 

 3)Boolean

The variables have the two scopes such as

 1)Global variable and

 2)Local variable

Variable has the names and the reserved keywords like

abstract, keyword, enum, etc. 

03

OPERATORS04Operators are the one used to calculate the expressions,

and then it supports the following types such as 

Arithmetic Operators Comparison Operators Logical Operators Assignment Operators and Conditional Operators.

STATEMENT AND LOOPS

Statements javascript such as

1) if

2) if else and

3) nested if else 

Loop Control in javascript such as

1) For loop

2) while loop

3) do-while loop

06

FUNCTIONS AND EVENTS07

Functions are the group of reusable code which can be

called anywhere in the program and it eliminates the

process of writing the code again and again. In JavaScript,

function keyword is followed by the unique function name

and a list of parameters. Events are the part of the

document object model and some examples of events like

pressing any key, closing a window, resizing a window, etc.

Then it has the types of click event type, onsubmit event

type, onmouseover, and onmouseout.

COOKIESIt is a most efficient method of remembering and tracking,

commissions and other information required for better

experience. It is the plain text data record with the five variable

lengths such as expires, domain, path, secure and name=value.  

   

08

PAGE REDIRECTION

It is the situation of redirecting to the another page

of Y by clicking the page of X, there are various

reason to redirect the user they have many built-in

pages based on the browsers, or the search engine

may have already indexed your page.

09

DIALOG BOX JavaScript supports the three dialog box they

are an alert dialog box which is mostly used to

give a warning message to the user, then

confirmation dialog box used mainly to take the

user’s consent on any option. A prompt dialog

box is used when you want to pop-up a text box

to get user input.

10

JAVASCRIPT OBJECTS

It is a programming language which can be called

object-oriented if it provides the capabilities of

1) Encapsulation

2) Aggregation 

3) Inheritance and

4) Polymorphism

It has the number properties like

1)MAX_VALUE

2)MIN_VALUE

2)NaN, etc.

11

BOOLEAN OBJECT

It represents the two values as true or false and has the

properties of constructor and prototype along with the

Boolean methods of tosource (), tostring () and valueof ().

In a similar way, the properties and methods are available in

the strings, arrays, date, math and RegExp.

12

ERROR HANDLING There are three types of the programming such

as syntax error which is also called parsing

error, that occurs at the compile time, then

runtime error called exceptions occurs during

execution. The logical error is the most difficult

type to track the error; they occur when there is

a mistake in the logic that drives your script.

13

VALIDATION AND ANIMATION

It usually performs the two functions such as

Basic validation and

data format validation.

JavaScript has the individual elements to create they are fireworks,

fade effect, roll-in or roll-out, page-in or page-out and object

elements.

Then it provides the two most important functions used in animation

programs they are setTimeout (function, duration), setInterval

(function, duration) and clearTimeout (setTimeout_variable). 

14

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