[GitHub] wicket issue #258: Wicket 6498 deferred javascript made simple

[svenmeier]

Github user svenmeier commented on the issue:

    https://github.com/apache/wicket/pull/258
  
    Ah, that one is easy: Your header item is defining a function "wbAction". 
With deferred items this function is now defined inside the 'DOMContentLoaded' 
callback only.
    
    This is one of the corner cases that can be solved in client only:
    
    ```
        private static StringBuilder getNamedFunctionStr(String name, 
AbstractDefaultAjaxBehavior b, CallbackParameter... extraParameters) {
                StringBuilder sb = new StringBuilder();
                sb.append("window.").append(name).append(" = function(");
                boolean first = true;
                for (CallbackParameter curExtraParameter : extraParameters) {
                        if (curExtraParameter.getFunctionParameterName() != 
null) {
                                if (first) {
                                        first = false;
                                } else {
                                        sb.append(',');
                                }
                                
sb.append(curExtraParameter.getFunctionParameterName());
                        }
                }
                sb.append(") {\n");
                sb.append(b.getCallbackFunctionBody(extraParameters));
                sb.append("}\n;");
                return sb;
        }
    ```


---