Writes an error to the log and throws an exception if expectedFunction fails the Prototype isFunction method. Returns String containing the error message written to the log.
Parameter | Type | Description |
---|---|---|
expectedFunction | Object | Object to be checked to be a function. |
message | String | Custom message to use if the assertion fails. Message will be run through template evaluation against messageProperties so you can include details of the assertion failure in the message. |
messageProperties | Object | Object containing values to use with template evaluation. |
Example usage:
Mojo.Event.listen=function listen(target,type,handlerFunction,useCapture){ Mojo.requireDefined(target,"Mojo.Event.listen: 'target' parameter must be defined."); Mojo.requireString(type,"Mojo.Event.listen: 'type' parameter must be a string."); Mojo.requireFunction(handlerFunction, "Mojo.Event.listen: 'handlerFunction' parameter must be a function."); target.addEventListener(type,handlerFunction,!!useCapture); };
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