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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:Â Page Printing JavaScript objects Boolean Object Error Handling Validation and Animation
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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.Â
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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
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DATA TYPES AND VARIABLES 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.
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OPERATORS Operators 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.
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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
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FUNCTIONS AND EVENTS 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.
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COOKIES It 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.
09 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.
10 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.
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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.
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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.
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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.
VALIDATION AND ANIMATION
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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).Â
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