1 / 12

Making AJAX Easy with jQuery

Join Chris Renner, Health Systems Analyst and Informatics Manager at VUMC, for a detailed presentation on AJAX and jQuery. This session covers what AJAX and jQuery are, showcases a hands-on demonstration and tutorial, and provides valuable resources for further learning. Discover how AJAX enhances user experience by allowing dynamic content updates without refreshing the page, while jQuery simplifies JavaScript coding. Perfect for web developers looking to deepen their understanding of these essential technologies.

anakin
Télécharger la présentation

Making AJAX Easy with jQuery

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Making AJAX Easy with jQuery Chris Renner Health Systems Analyst Programmer & Informatics Manager VUMC Office of Grants & Contracts Management October 18, 2010

  2. Agenda • What is AJAX? • What is jQuery? • Demonstration/Tutorial • Resources • Q&A

  3. What is AJAX? • Asynchronous JavaScript And XML • A bundle of technologies used together to enhance user experience by altering displayed information on a web page without a page refresh. • Employs HTML, CSS and JavaScript on client (browser) side, plus any one of a number of server-side technologies (e.g. PHP, ASP, etc).

  4. AJAX visual model

  5. What is jQuery? • A “JavaScript Library” that simplifies HTML and document traversing, event handling, animating, and AJAX interactions. • A short hand for writing JavaScript with fewer lines of code do to the same things. • “Write less, do more” • Most widely adopted (Google, Dell, BofA, Digg, WordPress, Drupal, others), in use by 1/3 of top 10,000 websites.

  6. jQuery Syntax Examples Get value by ID - JavaScript: varfoo = document.getElementById(‘bar’).value; - jQuery: varfoo = $(‘#bar’).val(); Daisy Chaining $(“#myDiv”).addClass(“myClass”).css(‘font-weight’, ‘bold’).fade(‘slow);

  7. XMLHTTP Request with JavaScript varreq; function loadXMLDoc(url) { req= false; // branch for native XMLHttpRequest object if(window.XMLHttpRequest && !(window.ActiveXObject)) { try { req= new XMLHttpRequest(); } catch(e) { req= false; } // branch for IE/Windows ActiveX version } else if(window.ActiveXObject) { try { req= new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) { try { req= new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) { req= false; } } } if(req) { req.onreadystatechange= processReqChange; req.open("GET", url, true); req.send(""); } }

  8. XMLHTTP Request with jQuery $.ajax({ type: "POST", url: "some.php", data: “city=Nashville", success: function(msg){ alert( "Data Saved: " + msg ); } });

  9. Tutorial/Demo • AJAX auto-complete

  10. Resources • Beginning Ajax with PHP, Lee Babin, Apress, Amazon id: 1590596676 • http://www.jQuery.com • W3chools AJAX tutorial: http://www.w3schools.com/Ajax/Default.Asp

  11. Demo Q&A • Any questions?

  12. Find Me Phone: 2-7404 Email: chris.renner@vanderbilt.edu Dept Website: http://www.mc.vanderbilt.edu/gcm Web Development Blog: http://www.chrisrenner.com

More Related