Friday, 20 May 2016

P3 – Explain the fundamentals of a scripting language



Unit 20 – Client Side Customisation of Web Pages


P3 – Explain the fundamentals of a scripting language



Introduction



Within this written report I will be describing and discussing all the fundamentals of JavaScript and jQuery, I will explain in depth how each scripting language is used. I will also explain all the differences between each scripting language and how they are used for different purposes.
JavaScript


JavaScript is known as a scripting language, it contains many of the features of a programming language. There are a variety of different programming features within JavaScript such as Loops, If Statements, Functions and Procedures and you cannot really use JavaScript properly without being able to use functions and sub procedures. JavaScript is a client side scripting language; JavaScript is widely used on Web pages for different user experiences and interactivity on the website as well as for displaying messages, drop-down menus and other user interface elements. Many websites gather information from users in online forms, and JavaScript can help validate entries.


JavaScript simply works by making a request to the server and went on to Amazon and typed in the search bar Shoes or Books. JavaScript is not executed, data is simply sent to the server and the language on the server, PHP for example will interrogate the database and make the page up to send back to you.


The performance of JavaScript as a scripting language allows the tasks on the user computers to be performed, this makes the performance of the web much more immediate for the users as it does not have to perform validation tasks for each field for an example in a form, otherwise the server would have to check all the requests made by the users which can decrease the performance of the webserver. Another benefit of the JavaScript is that it allows the website to be more interactive and dynamic such as adding shopping baskets unlike other programming language that runs on the server.
When comparing JavaScript to Java has control structures compared to Java but it cannot complete powerful actions and Java code needs to be compiled while JavaScript code are all in text.


JQuery



JQuery is an open source JavaScript library, which means that it is a free collection of pre-coded routines and actions that JavaScript can use. JQuery is not a language, but instead is a well written JavaScript code; it is a type of framework which is built using JavaScript. JQuery is a type of coding which almost simplifies basic tasks that you would want to happen in a web browser. It is very useful simply because of simple functions and features such as making a pop-up box appear in a website when a button is pressed could be written in 2-3 lines of JQuery coding whilst in JavaScript it would take a whole page of coding for this function to be completed. This is because JQuery is its own library where it stores all the different type of information related to JQuery so that you do not need to define each and every single aspect.


JQuery helps to implement user interface related to functionality without having to write a lot of lines of coding, in other words it is very simple, easy and fast to complete functions and features using the JQuery coding. There are a variety of different features and functions that JQuery can complete such as being able to navigate HTML documents and also allows the user to be able to modify text, process form data, move elements on a page, and perform animations. JQuery is a type of code that is used by web developers to increase the interactivity of websites, handle events and to mainly increase the ease of use for both the user and the designer. It is also very useful for simplifying the client side scripting languages used in HTML.


 




 
Sources of References



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