Web Development Lesson 3 - Software Team

OUTLINES  What is Web Development ?  Front end development  Front end development technologies  Back end development  Back end development technologies  Who is a Web Developer ?  Types of Web Developer  How a website works ?  Difference Between Web Developer and Web Designer  Projects WHAT...

OUTLINES  What is Web Development ?  Front end development  Front end development technologies  Back end development  Back end development technologies  Who is a Web Developer ?  Types of Web Developer  How a website works ?  Difference Between Web Developer and Web Designer  Projects WHAT IS WEB DEVELOPMENT ?  Web Development usually refers to developing the website for the Internet (World Wide Web) or for an Intranet (Private network).  Also known as Web Programming.  It is the creation of Dynamic Web Applications.  Examples of Web Applications are Social networking sites like Facebook or E-commerce sites like Amazon, Flipkart, etc.  There are two broad division of Web Development –  Front-end Development (also called Client-side Development)  Back-end Development (also called Server-side Development). FRONT END DEVELOPMENT  Front end development refers to producing a web application so that a user can see and interact with them directly.  It is also known as Client side development.  It focuses on the visual elements of a website that a user will interact with.  A front end developer has one general responsibility: to ensure that website visitors can easily interact with the page. They do this through the combination of design, technology and programming to code a website's appearance, as well as taking care of debugging.  The common technologies we can use in front-end development are:  HTML  CSS  JAVASCRIPT FRONTEND DEVELOPMENT TECHNOLOGIES  HTML was first created by Tim Berners-Lee, starting in 1989. It stands for Hyper Text Markup Language.  Hypertext means that the document contains links that allow the reader to jump to other places in the document.  A Markup Language is a way that computers speak to each other to control how text is processed and presented.  It describes the structure of a web page and consists series of elements.  Its elements tells browser how to display the content.  It’s code is written in Notepad or any text editor but save it as.htm or.html extension. FRONTEND DEVELOPMENT TECHNOLOGIES (CONT..)  CSS was first proposed by Hakon Wium Lie on October 10, 1994 at CERN (European Organization for Nuclear Research).  Cascading Style Sheets (CSS) describes how HTML elements are to be displayed on screen.  CSS saves a lot of work. It can control the layout of multiple web pages all at once.  It is also responsible for responsive layouts of a website.  It is also written in any text editor but save as.css extension. FRONTEND DEVELOPMENT TECHNOLOGIES (CONT..)  Javascript was invented by Brendan Eich in 1995.  Javascript is the Programming Language for the Web.  Javascript can update and change both HTML and CSS.  Javascript is responsible for the Functioning of the website.  It is a scripting language that enables us to create dynamically updating content, control multimedia, animate images, and pretty much everything else.  It is also written in any text editor but add the.js extension. EXAMPLE OF A WEBSITE BACK END DEVELOPMENT  Backend development controls what goes on behind the scenes of the web applications.  It is also known as server side development.  Backend usually consists of three parts:  A server  An Application  A Database  Users can’t see how the backend works but this code is what communicates the database information to the browser.  Common Backend development technologies are:  SQL  PHP BACKEND DEVELOPMENT TECHNOLOGIES  SQL stands for Structured Query Language.  SQL let us access and manipulate databases.  SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for standardization (ISO) in 1987.  SQL is a database language, it is used for database creation, deletion, fetching rows, and modifying rows, etc.  It can retrieve data and executes queries against the database.  Every website is supported by a database at the backend. Each time a user submits information or searches something in the website, data gets stored and retrived from the database. SQL is the language for qurying and storing data in the database. BACKEND DEVELOPMENT TECHNOLOGIES (CONT..)  PHP is an acronym for “PHP: Hypertext Preprocessor”.  PHP is a widely-used, open source scripting language.  PHP scripts are executed on the server.  PHP is free to download and use.  PHP is a server side scripting language that is embedded in HTML.  It is used to manage dynamic content, databases, session tracking, even build entire e-commerce sites. WHO IS A WEB DEVELOPER ?  A web developer is a programmer who specializes in the development of World Wide Web applications using a client–server model.  The applications typically use HTML, CSS and JavaScript in the client, PHP, C#, Python, Node.js or Java in the server, and http for communications between client and server.  Web developers typically do the following:  Meet with clients or management to discuss the needs and design of a website.  Create and test applications for a website.  Write code for the website, using programming languages such as HTML, CSS, etc.  Work with other team members to determine what information the site will contain.  Work with graphics and other designers to determine the website's layout.  Integrate graphics, audio, and video into the website.  Monitor website traffic. TYPES OF WEB DEVELOPER  There are 3 kinds of Web Developers –  Front End Developer,  Back End Developer and,  Full Stack Developer.  Front-End Developer :-They are responsible for how a website looks. They create the site's layout and integrate graphics, applications (such as a retail checkout tool), and other content. They also write web design programs in a variety of computer languages, such as HTML or JavaScript.  Back-End Developer :- They are responsible for server-side web application logic and integration of the work front-end developers do.  Full-Stack Developer :- A full-stack web developer is a person who can develop both client and server software. They perform the task of both Front end and Back End Developer. HOW A WEBSITE WORKS ? When you type a web address into your browser :  The browser goes to the DNS server, and finds the real address of the server that the website lives on.  The browser sends an HTTP request message to the server, asking it to send a copy of the website to the client.  If the server approves the client's request, the server sends the client a "200 OK" message, which means "Of course you can look at that website! Here it is", and then starts sending the website's files to the browser as a series of small chunks called data packets.  The browser assembles the Data Packets into a complete web page and displays it to you. WEB DEVELOPER VS. WEB DESIGNER Web Developer Web Designer  Web Developers are more technical in nature.  Web Designers are very creative in nature.  Web development refers to building user-friendly  Web designers are the aesthetic element. websites based on client’s specifications.  They transform designs into fully functional websites.  Web development refers to the functionality of the website on how it works.  Languages used are HTML, PHP, JavaScript, CSS, Python, Ruby, jQuery etc.  They transform the ideas into visually appealing designs.  Web designs refers to how the websites looks and feels on the outside.  Web designing tools include Abobe Photoshop, Illustrater, DreamWeaver, Sketch etc. PROJECTS My First Project  PROJECTS (CONT...) Flipkart Clone Project  PROJECTS (CONT...) Responsive Blogging Website  PROJECTS (CONT...)