About the Ajax. The name AJAX is short for Asynchronous JavaScript and XML.
Tutorial Details:
It uses the JavaScript XMLHttpRequest function to create a tunnel from the client's browser to the server and transmit information back and forth without having to refresh the page. The data travels in XML format because it transmits complex data The name AJAX is short for Asynchronous JavaScript and XML. It uses the JavaScript XMLHttpRequest function to create a tunnel from the client's browser to the server and transmit information back and forth without having to refresh the page. The data travels in XML format because it transmits complex data types over clear text.AJAX uses XHTML for the data presentation of the view layer, DOM, short for Document Object Model, which dynamically manipulates the presentation, XML for data exchange, and XMLHttpRequest as the exchange engine that ties everything together.
Some classic examples of applications that would benefit from AJAX are searching for information and displaying it back in a table, related select dropdowns, or checking if a user exists before submitting an entire form.As we can see, AJAX offers many advantages over traditional HTML applications, but we shouldn't overestimate it. Because the data is JavaScript-driven, one of the main drawbacks is that search engines won't index any of the dynamically generated content. It's definitely not SEO-friendly.
The engine.js contains the whole AJAX object that we'll use as our tunnel and cfajax.cfm has some basic functions that your ColdFusion model will have to include to decode the AJAX packet. Other files, not so core anymore, are 'util.js.' which contains a series of DOM functions to facilitate HTML manipulation when the server response is received, 'rico.js,' used for a built-in accordion example, and 'settings.js,' which aren't really settings, only the location of your ColdFusion model and an error-handler function. The only reason why this file exists is to hide the location of your ColdFusion file should someone open and view the source of your HTML file, which in my opinion is counter-productive because you have to edit this file and add a location variable every time you want to use AJAX with different models. The security should be built into the ColdFusion file.Some people will claim that they can provide you with AJAX functionality without writing a single line of JavaScript; I disagree. Although you could use ColdFusion libraries to generate JavaScript, the results will be limited to the functionality provided. AJAX means asynchronous JavaScript and XML, not ColdFusion. So if you want to use AJAX effectively and provide solutions to new problems, you should learn JavaScript.
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