JavaScript is a scripting language that enables web creators to design interactive sites. JavaScript is an open language meaning it can be used by anyone without having to buy a license. One of the tasks that JavaScript is able to do is that it can interact with the HTML code of a website which allows website creators to put in dynamic content in their sites. All browsers today support JavaScript as it is a crucial part of our everyday browsing experience. We may not notice it but it’s on nearly every website; from e-commerce websites such as Amazon and e-bay to watching videos on YouTube. For example with JavaScript you can add animations to a website to attract customers and if the user clicked on the animation it could take them to a certain page on the website. In conclusion, JavaScript allows people to build highly responsive user interfaces, prevent frustrating page reloads and even fix issues for CSS. These types of languages, which can enable functionality to work, are client side scripting languages, which affect the data that the end user sees in a browser.
One of the advantages client side
servers is that it is executed on the user's computer and therefore responds immediately
to users actions, and executes actions quickly as well. It also allows
the developers to have more control over the creation of web pages, for example
the look and usability of the webpage. However not all browsers support the
scripts and those who do support, support it differently. Therefore the look of
the webpage may be different in every browser. One advantage of server side scripting is
that since it does not require plug ins, it reduces the load on the user’s
computer. However it requires the language to be installed on the
server.
For example on the Amazon website when the users hover over a button on the navigation bar, a drop down list appears. This is done by client side scripting. If this action was to be done by server side scripting then a lot of time would be needed because the data would be transferred from client to server and server to client continuously, which could be extremely time consuming and would require a lot of processing from the server; therefore it executes the action straight from the client’s computer and browser.
Server side scripting is a form of scripting
language which uses servers to execute actions; it waits for users’ action;
once the action has been performed the data travels to the servers’ database
and then waits for the servers’ response. Meanwhile the server searches through
the database; when the server has found what it’s looking for it will send the
information back to the client and the webpage can then be displayed on clients’
web browser.
Server side scripting is usually used in actions
that require security; such as online payments. Since server side is more
secure and payments require client’s data to be checked on the server therefore
server side scripting is used. Therefore making it more secure than client side scripting.
User Experince
Client side scripting can be embedded into HTML; and can work with CSS therefore it allows developers to create more graphical and interactive webpages. Client side scripting responses are a lot quicker than server side scripting responses.
Interactivity is very important on a website, for example if a user searches a page on Amazon it can take a really long time to find what they want. However with the buttons and drop down lists and drop down menus, they would find it a lot easier to search through and easier to refine what they are looking for.
Websites use web functionality such as pop-ups and drop down menus, Amazon is a good example as it has drop down menu and if the mouse is hovered over a link it becomes bold and orange telling the user they have performed an action.
Developers can create web pages with HTML; however without
any scripting the webpage will not be responsive to users’ actions. By adding
client side scripting the developers can create more interactive web pages; this
method enables the developers to create events by hiding or showing elements on
the page, moving elements, or changing colours and fonts. Showing and hiding
tables is the essence of how you create a drop down menu on a Web page.
Validation
Validation is used in client side as well as server side, however both
ways are different. Validation is needed in both scripting languages in order
to validate data which is entered into the specific fields within a webpage.
Validation means that data is applicable;
JavaScript can also be used to validate data before sending it off to the
server for example if an email is required, the website would validate if the
email is correct. It can do this by looking for the ‘@’ sign; as it would not
go through millions of email adds to see if the email address exists. This means that the request is
sent to the server to validate if it is an email address. This means that the
request is send backwards and forwards wasting time. Therefore if the
validation is done on client side using JavaScript, it saves from the request
sending forward and backwards.
Website-Wikipedia
Date-06/05/2014
Time- 4:30
http://en.wikipedia.org/wiki/JQuery
Website-programmerstackexchange
Date-06/05/2014
Time- 4:50
http://programmers.stackexchange.com/questions/46137/what-is-the-main-difference-between-scripting-languages-and-programming-language
Website-w3school
Date-04/06/2014
Time- 4:50
http://www.w3schools.com/js/js_form_validation.asp
Website-microscopy
Date-04/06/2014
Time- 10:00
http://www.microscopy-uk.org.uk/
