Hire the Best AJAX Developers

Clients rate our AJAX Developers
Rating is 4.7 out of 5.
4.7/5
Based on 4,264 client reviews
Randall B.

Oregon City, Oregon

$40/hr
4.6
365 jobs

Full stack developer w/ 12 years experience and focusing on WordPress development and giving clients what they want. Task oriented. Clear communicator. Loves the work, takes ownership of every project. I make myself readily available to my clients 5 days a week and sometimes 6. 'Randall is an honest and available developer. Most developers do not make themselves available to discuss requirements with the client and with the team but randall goes above and beyond the expectation' - Jonathon Bridges 'We really enjoyed working with Randall to complete a rush project. He was easy to work with, in communication regularly and helped us get the job done right.' - Kat Bundy -WordPress -PHP -JavaScript -jQuery -CSS3 -WooCommerce -SASS -mySQL Beyond just tweaking themes, I can offer a high level of WordPress customization, including but not limited to: custom plugins, custom widgets, custom post types and just about any kind of custom functionality you need. If I am one thing it's flexible, client have different methods and needs, no 2 clients are exactly alike. Listening to clients and giving them what they want is what I do. Sometimes a client need an advisor as well as developer, in those situations, I'm adept at providing these kinds a clients a road map to success. 'This was my first experience with Upwork. I couldn't have picked a better partner to help me with my task.' - Joe Cotellese "Randall is super easy to work with, he anticipates issues and is very timely in bringing them up. His skill and cooperation are excellent and he is very accessible. He gets the work done quickly, follows direction and does a great job! He can also think for himself and isn't shy about researching issues. I will happily continue to use Randall for my WordPress development. - Merry Gray "Randall is nothing short of amazing! He is the best developer I've ever worked with. He really came through for us." - Don Slepien

  • AJAX
  • Custom PHP
  • CSS 3
  • JavaScript
  • WordPress
  • jQuery
  • Adobe Photoshop
  • PHP
  • HTML5
  • Web Development
  • Twitter/X Bootstrap
  • WooCommerce
Gopal H.

Surat, India

$18/hr
4.9
55 jobs

๐Ÿš€ Top Rated Plus | 9+ Years Experience | 7700+ Hours | 100% Job Success Hi, I'm Gopal, a Senior Full-Stack Web Developer & AI Application Specialist with over 9 years of experience delivering secure, scalable, and high-performance applications. I specialize in end-to-end development, from clean and responsive user interfaces to powerful backend systems. I also built and productionised AI platforms similar to Lovable, ChatGPT, and Base44, including private deployments, API integrations, and automation workflows. Whether you need a SaaS platform, an AI chatbot, a business automation system, an eCommerce solution, or a Base44 app rebuilt outside the platform, I deliver solutions that are reliable, maintainable, and built to scale. ๐Ÿง  AI & Automation โœ… Lovable-style AI apps โœ… ChatGPT-like conversational systems โœ… Base44 app duplication & migration โœ… AI agents & workflow automation โœ… API-driven AI integrations ๐Ÿงฑ Backend & Frameworks โœ… Laravel / Filament โœ… CodeIgniter โœ… WordPress (Custom Themes & Plugins) โœ… CakePHP ๐ŸŽจ Frontend & Realtime โœ… ReactJS โœ… VueJS โœ… JavaScript (ES6+) โœ… jQuery / AJAX โœ… WebSockets ๐Ÿ—„๏ธ Databases & APIs โœ… REST API development & integration โœ… MySQL โœ… MongoDB ๐ŸŒ Web & Design โœ… HTML / HTML5 โœ… CSS / Bootstrap โœ… Social media integrations โœ… Photoshop I communicate clearly in spoken and written English and am known for being proactive, reliable, and deadline-driven. Client satisfaction comes from clean code, transparency, and consistent delivery.

  • MySQL
  • Laravel
  • CodeIgniter
  • CakePHP
  • React
  • jQuery
  • API Integration
  • Payment Gateway Integration
  • Vue.js
  • Angular
  • Ecommerce Website Development
  • React Native
  • REST API
  • ERP Software
  • Medical Billing
Rehan R.

Houston, Texas

$55/hr
5.0
35 jobs

I am a US-based Senior PHP & WordPress Developer with 14+ years of experience building, optimizing, and troubleshooting high-performance web applications, SaaS platforms, and e-commerce systems. Since 2011, Iโ€™ve helped startups, agencies, and established businesses launch, maintain, and scale their websitesโ€”with hundreds of successful projects completed across PHP, Laravel, CodeIgniter, WordPress, WooCommerce, and custom backend systems. I specialize in solving difficult technical problems and improving the stability and performance of existing platforms, including: โœ” Backend Development (PHP / Laravel / CodeIgniter / Drupal) ๐Ÿ”น API development & integrations ๐Ÿ”น Authentication, OTP, admin panels ๐Ÿ”น Cron jobs, queues, logic debugging ๐Ÿ”น Building secure, scalable backend systems ๐Ÿ”น Custom PHP development & legacy code modernization ๐Ÿ”น Payment gateway and third-party API work โœ” WordPress & WooCommerce Expertise ๐Ÿ”น Custom plugins & theme development ๐Ÿ”น WooCommerce customization & API integrations ๐Ÿ”น Database optimization, speed tuning, caching ๐Ÿ”น Troubleshooting complex site issues ๐Ÿ”น Migrations, fixes, redesigns, and enhancements โœ” Full-Stack Web Development ๐Ÿ”น PHP, JavaScript, jQuery, Ajax, JSON, JQuery, ReactJS, VueJS ๐Ÿ”น Bootstrap, Tailwind, HTML5/CSS ๐Ÿ”น SaaS development ๐Ÿ”น Dashboard and UI/UX improvements โœ” Server & Infrastructure Troubleshooting ๐Ÿ”น VPS / cPanel / Cloudflare / AWS Lightsail / Azure ๐Ÿ”น Fixing crashes, downtime, SSL, DNS, redirects ๐Ÿ”น Email deliverability, PHP mailer fixes, MySQL errors โœ” Database & Performance Optimization ๐Ÿ”น MySQL indexing, query optimization ๐Ÿ”น High-traffic site improvements ๐Ÿ”น Fixing slow sites, 500 errors, memory issues โœ” Payment Gateways Integration ๐Ÿ”น Stripe, PayPal, Braintree, Square, Authorize.net, Klarna โœ” Integrations, APIs & Data Feeds ๐Ÿ”น REST API development & third-party API integrations ๐Ÿ”น IDX / MLS real estate data feed integration & customization ๐Ÿ”น Twilio (SMS, Voice, OTP), Sinch ๐Ÿ”น Mailgun (Transactional Email) ๐Ÿ”น Webhooks, automation workflows, custom API endpoints โœ” DevOps & Version Control ๐Ÿ”น Git, GitHub, Bitbucket, GitLab, JIRA ๐Ÿ”น Docker for containerized development

  • AJAX
  • PHP
  • MySQL
  • JavaScript
  • jQuery
  • CodeIgniter
  • Stripe
  • RESTful API
  • API
  • React
  • Vue.js
  • HTML5
  • CSS
  • Bootstrap
  • Laravel
Sumit K.

Kharar, India

$15/hr
4.7
322 jobs

๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐„๐ฑ๐ฉ๐ž๐ซ๐ญ | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐–๐ž๐› ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ž๐ซ | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐–๐ž๐› ๐ƒ๐ž๐ฌ๐ข๐ ๐ง | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐“๐ก๐ž๐ฆ๐ž ๐ƒ๐ž๐ฌ๐ข๐ ๐ง | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐๐ฅ๐ฎ๐ฌ ๐„๐ฑ๐ฉ๐ž๐ซ๐ญ | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐‹๐ข๐ช๐ฎ๐ข๐ ๐‚๐จ๐๐ข๐ง๐  | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐€๐ฉ๐ฉ๐ฌ | ๐…๐ฎ๐ฅ๐ฅ ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐’๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ | ๐๐ซ๐จ๐Ÿ๐ž๐ฌ๐ฌ๐ข๐จ๐ง๐š๐ฅ ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ž๐ซ | ๐’๐ก๐จ๐ฉ๐ข๐Ÿ๐ฒ ๐’๐ญ๐จ๐ซ๐ž ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ I help businesses build high-converting Shopify stores that are fast, modern, and optimized for sales. From custom Shopify design and theme development to store setup, product pages, and app integrations, I create scalable eCommerce solutions tailored to your brand and business goals. With expertise in both Shopify design and development, I provide complete end-to-end Shopify solutions tailored to your brand and business goals. I can build a new Shopify store from scratch or improve your existing store based on your requirements. ๐Ÿš€ What I can do for you: โญ Custom Shopify theme development (from scratch) โญ Figma to Shopify (pixel-perfect design) โญ Shopify store setup (products, collections, pages) โญ Speed optimization & performance improvement โญ Conversion-focused redesign (CRO) โญ App integration & advanced functionality โญ Bug fixing & ongoing support โญ Store migration (any to Shopify) ๐Ÿ’ก Why choose me: โญ Conversion-focused approach (not just design) โญ Clean, fast, and scalable code โญ Mobile-first and user-friendly UI/UX โญ Reliable communication & fast delivery ๐Œ๐ฒ ๐–๐จ๐ซ๐ค ๐ž๐ฑ๐ฉ๐ž๐ซ๐ข๐ž๐ง๐œ๐ž ๐ข๐ง๐œ๐ฅ๐ฎ๐๐ž๐ฌ: โžค Shopify | Shopify 2.0 | Shopify Plus | Shopify Partner | Shopify stores Design | Shopify Store Development | Shopify Apps | Liquid Coding | Shopify Templates โžค Shopify App development from Scratch using NodeJS, React, Laravel, Yii Framework โžค Setup Shopify Store with responsive designs and optimized websites for performance and user experience. โžค Implemented custom features and configured various Shopify Apps for enhanced functionality โžค Shopify Apps (Oberlo, Dsers, Dropified, Importify, Spocket, Eprolo, etc.) โžค Expertise with Shopify Page Builder Apps (Shogun, PageFly, GemPages, etc. ) โžค Shopify Store Design Using Figma, XD, Sketch and Photoshop. โžค Shopify Custom Theme Design and Development (Free/Paid) โžค Implemented custom features and functionality using Shopify's API and custom coding. โžค Shopify Store Setup and Shopify Store Design โžค Shopify Product template customization โžค Custom checkout integration in Shopify โžค Bold, and Recharge subscriptions. โžค Shopify Store Management โžค Shopify Store ongoing maintainance I will be happy to discuss the details of the work both in writing and in the meeting. Feel free to inbox me now for ๐‚๐จ๐ง๐ฌ๐ฎ๐ฅ๐ญ๐š๐ญ๐ข๐จ๐ง. ๐—ฅ๐—ฒ๐—น๐—ฎ๐˜๐—ฒ๐—ฑ ๐—ฆ๐—ฒ๐—ฎ๐—ฟ๐—ฐ๐—ต: Deeksha Shopify Developers | Deeksha Shopify Designer | Shopify Templates Specialists | E-commerce Consultants | Ecommerce Website Development | Ecommerce Management Services & Solutions Shopify expert on Shopify Developer Shopify Designer Shopify Store set up Shopify website development Shopify Theme customization A Shopify Developer who can build a custom Shopify theme A Shopify Expert who understands UX, CRO, Liquid & performance A Shopify Developer who can redesign your entire storefront A Shopify migration expert (WooCommerce โ†’ Shopify, Wix โ†’ Shopify, etc.) A Shopify Developer for Shopify Plus and complex functionality #Shopify#ShopifyStoreDesigner#ShopifyonlinestoreDesigner#ShopifyEcommerceDesigner#ShopifyDeveloper#ShopifyDesigner #Ecommerce #WebDesign #CSS #HTML #ShopifyPlus #SEO #Dropshipping #FrontEndDevelopment #ResponsiveDesign #WebDesign #UIUX #WebDev #Shopifyexpertupwork #ShopifyDesigner #Shopify #Topratedplusdeveloper # ShopifyE-commercePlatform #ShopifyOnlinestore #ShopifyWebsiteDesign #ShopifyExpert #ShopifySpecialist #ShopifyAppDeveloper #Ecommerce #Dropshipping #FrontEndDevelopment #LandingPage #Shopifyexpertupwork #ShopifyPlus #Ecommercedeveloper TECH STACK Shopify | Shopify Plus | Shopify Online Store 2.0 | Shopify Liquid | Shopify Theme Development | Shopify Theme Customization | Figma to Shopify | PSD to Shopify | Shopify Speed Optimization | Shopify CRO | Shopify SEO | Shopify Apps | Shopify App Development | Shopify Store Setup | Shopify Store Redesign | Shopify Store Migration | Shopify Templates | Shopify Custom Theme | Shopify 2.0 Templates | Shopify Metafields | Shopify Admin API | Storefront API | AJAX API | React | JS | jQuery | HTML5 | CSS3 | Tailwind | Bootstrap | JSON | GraphQL | Node.js | Klaviyo Shopify | Shopify UX | Shopify Frontend Developer | Shopify Backend Developer | Shopify Developer Shopify Developer Shopify Expert Shopify Plus Developer Shopify 2.0 Developer Shopify Theme Developer Shopify Theme Customization Expert Shopify Store Setup Expert Shopify Website Redesign Expert Shopify Migration Expert Figma to Shopify Developer Shopify Liquid Developer Shopify Speed Optimization Expert Shopify CRO Specialist Shopify SEO Specialist Shopify Apps

  • Full-Stack Development
  • Custom Web Design
  • Custom Ecommerce Store
  • WordPress e-Commerce
  • Theme Customization
  • Shopify Development
  • Shopify Website Design
  • AI Development
  • AI Model Development
  • Web Development
  • React
  • Next.js
  • PHP
  • Laravel
Rinki P.

Delhi, India

$25/hr
5.0
89 jobs

๐—ช๐—ผ๐—ฟ๐—ฑ๐—ฃ๐—ฟ๐—ฒ๐˜€๐˜€ & ๐—ช๐—ผ๐—ผ๐—–๐—ผ๐—บ๐—บ๐—ฒ๐—ฟ๐—ฐ๐—ฒ ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐˜ | ๐—”๐—œ-๐—ฃ๐—ผ๐˜„๐—ฒ๐—ฟ๐—ฒ๐—ฑ ๐—ฃ๐—น๐˜‚๐—ด๐—ถ๐—ป๐˜€ | 12+ ๐—ฌ๐—ฒ๐—ฎ๐—ฟ๐˜€ ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ I help businesses fix broken WordPress websites, optimize slow performance, develop and customize plugins, work with page builders like Divi, Elementor, WPBakery, and Gutenberg, and build WooCommerce stores that actually convert. If your site is facing issues like JavaScript errors, slow mobile load times, checkout problems, or plugin conflicts I can quickly identify the root cause and fix it without breaking your live site. ๐—ช๐—ต๐—ฎ๐˜ ๐—œ ๐˜€๐—ฝ๐—ฒ๐—ฐ๐—ถ๐—ฎ๐—น๐—ถ๐˜‡๐—ฒ ๐—ถ๐—ป: โœ“ WordPress Bug Fixing (JS errors, critical issues, broken layouts) โœ“ WooCommerce Fixes (cart, checkout, payment gateway issues) โœ“ Website Speed Optimization (Core Web Vitals, mobile performance) โœ“ Plugin & Theme Conflict Resolution โœ“ Custom WordPress Development (Elementor, Bricks, custom code) โœ“ API Integrations (Stripe, PayPal, third-party tools) โœ“ Website Debugging & Performance Tuning ๐—ช๐—ต๐—ฎ๐˜ ๐—œ ๐—ฐ๐—ฎ๐—ป ๐—ฑ๐—ผ ๐—ณ๐—ผ๐—ฟ ๐˜†๐—ผ๐˜‚: โœ“ Fix critical errors affecting your website functionality โœ“ Improve slow-loading pages (especially mobile & ad traffic) โœ“ Optimize checkout flow and conversion issues โœ“ Clean and optimize messy or conflicting code โœ“ Ensure your website runs smoothly without downtime ๐—ช๐—ต๐˜† ๐—ฐ๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ ๐˜„๐—ผ๐—ฟ๐—ธ ๐˜„๐—ถ๐˜๐—ต ๐—บ๐—ฒ: โœ“ I fix the root cause, not just temporary patches โœ“ Clean, scalable solutions (no shortcuts that break later) โœ“ Strong debugging skills (PHP, JS, WordPress core) โœ“ Fast communication and quick turnaround โœ“ Focus on stability for live websites ๐—ช๐—ต๐—ผ ๐—ต๐—ถ๐—ฟ๐—ฒ๐˜€ ๐—บ๐—ฒ: โœ“ Business owners facing WordPress issues and need quick, reliable fixes โœ“ eCommerce brands looking to improve WooCommerce performance and conversions โœ“ Agencies needing a dependable WordPress developer for ongoing support โœ“ Clients dealing with slow websites, JavaScript errors, or plugin conflicts โœ“ Businesses that tried quick/cheap solutions and now need a proper long-term fix ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ ๐—›๐—ถ๐—ด๐—ต๐—น๐—ถ๐—ด๐—ต๐˜๐˜€: โœ“ Resolved complex WordPress issues affecting live eCommerce stores โœ“ Fixed JavaScript errors impacting functionality and tracking โœ“ Improved website performance and reduced load times significantly โœ“ Worked on WooCommerce checkout, payment, and cart issues โœ“ Delivered reliable solutions for ongoing maintenance and fixes ๐—ง๐—ฒ๐—ฐ๐—ต ๐—œ ๐˜‚๐˜€๐—ฒ ๐—ฑ๐—ฎ๐—ถ๐—น๐˜†: WordPress, WooCommerce, PHP, JavaScript, React, Next.js, Node.js, API Integration, REST API, WPGraphQL, ACF Pro, Elementor Pro, Bricks Builder, Figma to WordPress, Cloudflare, WP Rocket, Rank Math SEO, Stripe, PayPal, OpenAI API, ChatGPT Integration, AI Integration ๐—ง๐—ต๐—ฒ ๐˜€๐—ต๐—ผ๐—ฟ๐˜ ๐˜ƒ๐—ฒ๐—ฟ๐˜€๐—ถ๐—ผ๐—ป: $200K+ earned | Top Rated | Fast communicator | Reliable delivery

  • Wordpress Thrive Themes
  • Divi
  • AI Development
  • Generative AI
  • Chatbot Integration
  • WordPress Development
  • WooCommerce
  • Landing Page Design
  • Plugin Development
  • Elementor
  • API Integration
  • Figma
  • React
  • Webflow
  • Wix
  • Node.js
  • Claude
  • ChatGPT API
  • HIPAA
  • Performance Optimization
Ajay K.

Unnao, India

$20/hr
5.0
13 jobs

๐ŸŒŸ Transform Your Vision into Reality with a Trusted Tech Partner! ๐ŸŒŸ Hi there! Iโ€™m Ajay Kumar, a seasoned tech leader with 10+ years of expertise in Microsoft, Python, and Cloud technologies, leading a high-performing team that builds secure, scalable, and future-ready software solutions. Whether youโ€™re building from scratch, modernizing legacy systems, or scaling cloud infrastructure โ€” we make complexity feel simple. ๐Ÿš€ What We Deliver ๐Ÿ”ง Full-Stack Development Expertise Backend Powerhouse: โœ… Microsoft Stack: ASP.NET MVC, .NET Core, REST APIs, JWT, Entity Framework, Microservices โœ… Python Stack: Django, FastAPI, Flask, Tornado, Bottle, Pyramid, Falcon, Eve โ€” everything you need in Python development โœ… PHP Stack: Laravel, Core PHP, CodeIgniter โœ… AI/LLM Integration: Implement and fine-tune Large Language Models (LLMs) using OpenAI, HuggingFace, LangChain, RAG โ€” for smart apps like: AI chatbots Document summarization Semantic search Recommendation systems Frontend Brilliance: โœ… Angular โœ… React.js โœ… Razor Pages โœ… HTML5/CSS3 โœ… JavaScript โ€” responsive and modern UI/UX โ˜๏ธ Cloud & DevOps Mastery โœ… Azure: App Services, Functions, Blob Storage, Azure SQL, Azure AD, Azure DevOps โœ… AWS: Lambda, EC2, S3, RDS, API Gateway โœ… DevOps: CI/CD Pipelines, Docker, Kubernetes, Terraform, GitHub Actions, GitLab CI โœ… Cloud-Native Deployments: Secure and cost-efficient infrastructure ๐Ÿ” Secure, Scalable Data & Auth Systems โœ… Databases: SQL Server, PostgreSQL, MySQL โ€” optimized for performance & scalability โœ… Authentication: JWT, OAuth2, Azure AD, Identity Server โœ… Version Control: Git, GitHub, GitLab, GitExtensions ๐Ÿญ Industries We Empower We serve FinTech, Healthcare, eCommerce, Logistics, EdTech, Real Estate, and 15+ other industries โ€” delivering domain-aligned tech solutions with precision. ๐Ÿ’ก Why Partner With Us? โœ… End-to-End Product Ownership โ€” from UI to DevOps โœ… Microservices-Driven Architecture โ€” effortless scalability โœ… Security-First Mindset โ€” best practices & compliance (GDPR, HIPAA, etc.) โœ… Transparent Agile Development โ€” sprint planning, daily standups, and demos โœ… Fast LLM Integration โ€” build AI-powered features in days โœ… Full Python Stack coverage โ€” Django, FastAPI, Flask, Tornado, Bottle, Falcon, Eve & more ๐Ÿ•’ Availability & Reliability โœ… 24/7 Support & Monitoring โœ… Flexible Engagement Models (Dedicated, Hourly, Fixed) โœ… Rapid Onboarding & Transparent Communication ๐Ÿ”– #TechPartner #AzureDeveloper #AngularDeveloper #FullStackDevelopment #CloudSolutions #DevOps #PythonDevelopment #MicrosoftTechnologies #FastAPI #Django #Flask #LLMIntegration #Microservices #ASPNetCore #ReactJS #DatabaseManagement #CyberSecurity #AgileDevelopment #DigitalTransformation #eCommerce #Healthcare #FinTech #Logistics #PythonFullStack

  • HTML5
  • Bootstrap
  • H2 Database Engine
  • AWS Lambda
  • Jenkins
  • Kubernetes
  • ASP.NET
  • ASP.NET MVC
  • ASP.NET Core
  • ASP.NET Ajax
  • ASP.NET Web API
  • Entity Framework
  • LINQ
  • Microsoft SQL Server

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Don't just take our word for it

What is AJAX (Asynchronous JavaScript + XML)?

AJAX (Asynchronous JavaScript + XML) is a group of interrelated client- and server-side development technologies that allows parts of a webpage to be updated without having to reload the entire pageโ€”think of sites like YouTube, Google Maps, Gmail, and tabs within Facebook. It changed usability and the speed of web applications with its innovative concept: asynchronously exchanging small amounts of data with the server behind the scenes, without affecting the rest of the page.

AJAX makes features like drop-down menus, predictive text, auto-filled text, and more possible, all without clicking Refresh. What it means for servers is less stress on the network and faster operations. Thatโ€™s the core benefit of AJAX-enabled sites: overall, theyโ€™re more responsive and very efficient on both sides.

How does AJAX work?

AJAX calls are asynchronous, meaning theyโ€™re made behind the scenes, independently from each other and the site as a whole. When a browser makes an AJAX call to the server, it isnโ€™t stuck waiting for a response, halting all of the siteโ€™s functionality. Instead, the web service on the server will send the data back to the browser once the task is completed, where client-side scripts will process the response and deliver it to the user.

AJAX breakdown

AJAX uses the following technologies:

  • XML or JSON: the text-only format used to transfer data from server to browser script. Developers are increasingly using JSON over XML because of its native JavaScript compatibility.
  • CSS: the language used to style how the data will look onscreen
  • JavaScript: displays the data in the browser and processes user requests/interactions like clicks
  • XMLHttpRequest objects: the keystone of AJAX, they actually retrieve the data with the server behind the scenes. All modern browsers support XMLHttpRequests.

Callbacks vs. Postbacks.

Pre-AJAX, the rules for client calls to the serverโ€”basically, anything the browser requests from a database to make a site responsiveโ€”were โ€œpostbacks,โ€ plus server-side processing. Post-AJAX, the browser can โ€œcallback,โ€ requesting small amounts of data directly from the serverโ€”all without needing to wait for a postback.

Benefits of AJAX

  • Better speed and performance
  • More responsive, user-friendly websites and applications
  • Ease of development, thanks to JSON, jQuery, and compilers that help to streamline complex JavaScript code
  • Browser- and platform-independent. Also, Microsoft offers the AJAX Control Toolkit integrated into Visual Studio on the ASP.NET platform.
  • Ideally implemented for updating small bits of information within a web application
  • Allows text box autocomplete and predictive text
  • Wonโ€™t slow down with limited bandwidth. With AJAX callbacks, the server wonโ€™t get overloaded by requests, which would otherwise cause the app to slow down.

AJAX is just one advancements in the front-end development landscapeโ€”learn more about front-end web development and how AJAX fits into the client-side technology landscape as a whole.