JavaScript is a versatile, high-level programming language commonly used for web development. It enables dynamic interactions on websites, making them interactive and responsive.
React is a JavaScript library specifically designed for building user interfaces. It is particularly well-suited for developing single-page applications where you need a seamless and efficient user experience. Here are some key features of React:
Component-Based Architecture: React allows developers to build encapsulated components that manage their own state and compose them to create complex UIs. This modularity improves code reuse and maintainability [4].
JSX Syntax: React uses JSX, a syntax extension that combines JavaScript with HTML-like code, making it easier to write and understand the structure of UI components [6].
Virtual DOM: React maintains a virtual representation of the UI in memory, which it syncs with the real DOM using efficient algorithms. This results in faster updates and rendering, improving application performance [3].
Declarative UI: React allows developers to design simple views for each state in their application, and it will handle the rendering and updates efficiently. This approach makes it easier to predict and debug the UI behavior [2].
To get started with React, you can follow tutorials and documentation available on various platforms such as W3Schools and the official React website [1] [5].
🌐 Sources
- w3schools.com - React Tutorial
- legacy.reactjs.org - React – A JavaScript library for building user interfaces
- react.dev - React
- w3schools.com - What is React
- legacy.reactjs.org - Getting Started
- developer.mozilla.org - Getting started with React - Learn web development | MDN
Web Development Classes, Certificates And Bootcamps In NYC
Maintaining a solid online presence is vital for institutions, businesses and individuals in almost every professional context. This means that having access to someone who knows the ins and outs of web development is key, since programming and running web pages that work is an essential aspect of almost every public-facing business or project. Learning how to develop and maintain web pages will teach you a collection of professional skills that are only becoming more and more important as time goes on. If you are looking to learn how to code and run websites, you should consider looking into one of the many excellent training centers and educational resources available in NYC.
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What is web development?Web development is a large tent that encompasses all of the processes of building and maintaining the technical side of websites. This includes writing the code that the web browsers use to display the website, building and interlinking the databases that store important information pertaining to the pages and ensuring that the pages and databases are secure. Broadly speaking, since web development covers so many different topics, it is generally broken up into three smaller subsets focusing on what aspects of the development process are handled.
Front end web developmentFront end web development refers to the aspects of web development pertaining to aspects of the page that are visible to the user and that they interact with while utilizing the page. For example, the visual representation of this text and the links directing readers to other pages, internal and external, are front end development issues. Front end web development tends to utilize HTML & CSS and JavaScript (as well as its assorted libraries) to add functionality and interactive elements to a web page, which are vital for providing end users with an experience that is conducive to your end goals (whether this is providing easier access to information, streamlining a virtual storefront or giving users access to contact information that they can use elsewhere).
Back end web developmentBack end web development covers the other half of the web development equation, handling the aspects of the web page that are not visible to the end user. This includes everything from password databases to automated forms and invoices being created after an item is purchased from a web store. Back end web development is less concerned with the look and feel of the page as they are with its internal functionality, so they will spend more time working with complex databases and languages like Python and SQL. Back end development also concerns itself with ensuring that the website continues to remain functional as changes are made to the front and that the website and its databases are protected from hostile threats.
Full stack web developmentUnsurprisingly, full stack web development is the process of building both the front end and back end for a website and ensuring that the two systems work well with one another. Full Stack Developers will either learn how to use several different programming languages to build end-user content and databases or they will specialize in a specific, versatile programming language (like JavaScript) that lets them handle all of the major aspects of web development using a single syntax. Full Stack Web Developers are often employed by companies to handle all aspects of the development and upkeep processes when they are launching or significantly modifying one of their websites.
Why learn web development?Learning web development is appealing because nothing in the present suggests that businesses and institutions are going to move away from focusing on their web presence. While hard figures are very difficult to come by, it is estimated that about 175 websites are launched every minute and there are over 4 billion active pages (with upwards of 50 billion on the high end of total pages). Web development isn’t going out of style anytime soon and learning how to develop websites is practical even if you aren’t planning to build a career out of it. Everyone from small business owners to artists can benefit from learning how to develop websites (though the emergence of platforms like WordPress make it easier than ever to utilize templates and creation wizards to make your own website).
AJAX (Asynchronous JavaScript And XML)
What is AJAX (Asynchronous JavaScript and XML)?AJAX (Asynchronous JavaScript and XML) is a technique aimed at creating better and faster interactive web apps by combining several programming tools, including JavaScript, dynamic HTML (DHTML) and Extensible Markup Language (XML).
Based on open standards, AJAX uses a browser built-in XMLHttpRequest object, JavaScript and HTML Document Object Model (DOM) to exchange data between a web browser and web server, and to display this data.
AJAX supports data exchange with a web server behind the scenes and allows webpages to update asynchronously. This makes it possible to update parts of a particular webpage and display the results to a user quickly, without having to wait to reload the entire page.
Understanding Asynchronous JavaScript and XMLAJAX is not a proprietary technology, programming language or a packaged product. Rather, it is a web browser technology and open standard that's independent of web server software. It can send and receive information from web servers in various formats, including the following:
The AJAX method uses a combination of technologies that allow the content on webpages to update immediately based on a user's action, which may be a click on a page or even a simple mouse movement. Just one or a few parts of the page may be refreshed, instead of reloading or refreshing the entire page. This differentiates AJAX from an HTTP request, during which users must wait for a whole new page to load. AJAX can also access data from external sources even after a webpage has loaded completely.
AJAX uses JavaScript for dynamic content display, XHTML for content and XML to receive server data. In addition, it combines many other programming tools, such as the following:
XMLHttpRequest is an API that can be used by JavaScript and other web browser scripting languages to move and manipulate web browser data to and from a web server using HTTP. Since AJAX relies on XMLHttpRequest, early applications worked only with Microsoft's Internet Explorer browser. Today, almost all browsers support AJAX.
The 'Asynchronous' in AJAXAJAX executes within the JavaScript framework. Here's how the various AJAX processes work asynchronously:
All these asynchronous steps help create responsive HTML web content, as well as faster performance. As they achieve these goals, they help maintain a natural user interaction with webpages. Further, since AJAX is not dependent on web servers, it creates a data-driven environment rather than a page-driven environment. That's why it can execute tasks asynchronously and at any time.
How Asynchronous JavaScript and XML worksTo understand the workings of AJAX, it's important to remember that it has two key components: the web browser and the web server.
Also, conventional web applications transmit information to and from the web server using synchronous requests, which directs the user to a new page with new information from the server. But with AJAX, once a user hits the submit button (or performs some other action), JavaScript makes a request to the server, interprets the results and asynchronously updates the browser's screen.
Here's how the process works:
AJAX applications don't require the installation of a plugin but work directly with a web browser. These applications usually use XML to transport data. However, they may also transport data as plaintext or JSON text (see the Understanding AJAX section).
AJAX applications use an engine that acts as an intermediary between a user's browser and the server from which it is requesting information. Thus, instead of loading a traditional webpage, the browser loads the engine, which then displays the page to the user. The engine continues to run in the background, using JavaScript to communicate with the browser.
Any input from the user, such as clicking anywhere on the page, sends a JavaScript call to the engine, which responds instantly in most cases. If the engine requires additional data, it requests it from the server, usually using XML, while simultaneously updating the page.
Benefits of Asynchronous JavaScript and XMLSome key advantages of AJAX are as follows:
One drawback of AJAX-based applications is that they require increased communication between web browsers and web servers. This may result in application degradation due to the following:
In addition, some browsers may not be compatible with AJAX -- although this is rare. Finally, AJAX requires JavaScript, which can be difficult to debug and maintain.
Applications of AJAXGoogle Maps is one well-known application of AJAX. The interface allows users to change views and manipulate the map in Real Time.
AJAX can also be used to create the following:
See why collaboration is key to a secure web application architecture and how to apply web application reconnaissance fundamentals to improve offensive and defensive hacking skills.
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