[TYPO3-dev] JSON objects in view helper data attributes

[Benjamin Beck]

Hi,

i often do it like this:


<script>
// this works with the parser
var link = {f:uri.action(action: 'theAction')}
var variable = {variable}
</script>

<script>
<![CDATA[
var jsObj = {
	"Module:method": {
              "url": link
		“callback": {
                      “Some/Module:callbackMethod": {
                              “someValue": variable
                      }
              }
      }
}
$(function(){
	$('#test').data('click',jsObj);
});
]]>
<script>

<a id="test">test</a>



OR



<a id="test" href="javascript:void(0);" data-click='{
      "Module:method": {
              "url": link,
              “callback": {
                      “Some/Module:callbackMethod": {
                              “someValue": variable
                      }
              }
      },
      "Module:method": {"test": "value"}
}'>test</a>



Greetings
Benjamin

On 14.07.2014, at 10:44, Klaas Johan Kooistra <k.j.kooistra at youwe.nl> wrote:

> Hello,
> 
> I’m currently working on a way to trigger RequireJS module methods from in data attributes. For example:
> 
> <a id="test" href="javascript:void(0);" data-click='{
> 	"Module:method": {
> 		"url": “{f:uri.action(action: \'theAction\')}",
> 		“callback": {
> 			“Some/Module:callbackMethod": {
> 				“someValue": {variable}
> 			}
> 		}
> 	},
> 	"Module:method": {"test": "value"}
> }'>test</a>
> 
> The advantage of this format is that the data attribute value is automatically loaded as a JavaScript object. However, I can’t get this to work with view helpers. First of all it requires too much nesting, because the data attribute itself has to be defined within addiitonalAttributes. I tried using CDATA and escaping the quotes in any combination, but either the variables/view helpers inside the object don’t get parsed or it throws me an error (additionalAttributes should be an array but is a string because the parsing breaks on the curly braces).
> 
> The only way I managed to get it to work so far is by creating a custom view helper to assign the data to a variable using the templateVariableContainer and urlencoding it to prevent issues with non-escaped quotes. Unfortunately that also means I have to urldecode the data attribute value in the JavaScript and parse the JSON.
> 
> <n:assign variable="test" urlencode="1" value='<![CDATA[{
> 	"Module:method": {
> 		"url": "]]>{f:uri.action(action: \'theAction\')}<![CDATA[",
> 		...
> 	}
> }]]>' />
> <f:link.action additionalAttributes=“{data-click: ‘{test}'}” ...
> 
> I also looked into a way to set set array data (including the keys) from the template and json encoding it. I found an example of a view helper setting an array value using a property path. This may work for a few settings, but with too many options it will clutter the template and make the configuration hard to read.
> 
> 
> Does anyone have an idea how to make this work? Thanks in advance for any thoughts on this.
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