CFCLIENT: Doc examples don't work; Can't get anything to work?

Then I realize that the new mobile features CF11 was received with some very mixed reviews, but I wanted to try to see if I could use for some really simple device detection, but I can't get anything to actually work.

For example, I'm looking at the doc for cfclientsettings, specifically in the first example on the page under the heading "Detection devices. Here is the code for reference (I formatted it a bit to make sure it's easy to read here):

<cfClientSettings detectDevice=true />

<cfclient>

<cffunction access="public" name="showCanvasSupport" returntype="void">

<cfsetevalStr = "document.getElementById('canvas').innerHTML='" & cfclient.canvas & "'">

</cffunction>

</cfclient>

Canvas support -<b id="canvas"></b><br>

<button onclick="invokeCFClientFunction('showCanvasSupport',null)">Show canvas support< / button >

Create a new .cfm page and adding this code produce the text and a button on the page, but clicking on the button launches a JS error in Chrome: "Eception the signature of the function is invokeCFClientFunction (nomfonction [, arg1, arg2, arg3,...], successCallback, failureCallback).» The functionName, the successCallback and the failureCallback are mandatory. If you don't have a successCallback or failureCallback, null can be passed as value. »

OK, not very well.  So I checked a few docs more and decided to add another argument null to invokeCFClientFunction() call to correct the lack of recall.  This fixes at least the JS error, but now nothing happens when you click the button.

So after a few more bother, I arrived at the following code, which does not always work, but that seems closer:

<cfClientSettings detectDevice=true />

<cfclient>

<cffunction access="public" name="showCanvasSupport" returntype="void">

< cfscript >

document.getElementById('canvas').innerHTML=cfclient.canvas;

< / cfscript >

</cffunction>

</cfclient>

Canvas support -<b id="canvas"></b><br>

<button onclick="invokeCFClientFunction('showCanvasSupport',null,null)">Show canvas support< / button >

So, copy the following code, when you click the button, sets the innerHTML of the element canvas to "undefined". Awesome.

Honestly, I've tried all the examples that I can find to use cfclient and NONE of them work. Is there some secret I'm missing? I have a sneaking suspicion that if I don't creates a 'Mobile project' in the CFBuilder which does not have anything like that? If yes it is stupid and that they state that in the docs really.

What I'm trying to do, in the end, is just to use cfclient for a simple detection of devices and to enter the width of the browser/device to do some basic detection style query media love in "Using media queries" section of the cfclientsettings doc.  I want to just retrieve the width and then define a variable session based on it.

I use a developer version fully patched for CF11 on my machine Win7 with IIS configuration. Any help is welcome.

Post edited by: Andrew Regis Fixed some spelling/grammar mistakes!

After hitting my head on my keyboard for a while more, I got the job of scope cfclient.

I finally found this page in the docs: detect devices

At first glance, this page seems almost identical to the page of doc cfclientsettings , even having the same code examples.

However, where the cfclientsettings doc uses the scope as this:

cfclient.canvas

Detect devices doc page, he writes like this:

cfclient.properties.canvas

Boom. Of course, that's all it took. What a waste of time. All the cfclient scope variables of work very well if you add '.properties' in there.

I still don't know if the doc cfclientsettings is simply false, or if it is referencing in a different context. I'll definitely add a comment to him on this point.

(In addition, the JavaScript code still does not for this example on both versions of the doc, so there is that.)

Hope this helps someone who wants to make simple customer ColdFusion detection devices.

Tags: ColdFusion

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