Custom Validator 5.4

[George Christman]

Hello, I'm trying to build a custom validator but noticed some changes
regarding the js in 5.4. Does anybody know of a simple approach to handling
the js piece of the code?

            javaScriptSupport.require("t5/core/validation");
            writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true,
                    "data-validate-maxscale", constraintValue.toString(),
                    "data-maxscale-message", buildMessage(formatter, field,
constraintValue));

I'm not sure if I should be using coffee or what I'm suppose to be doing.

Thanks.