fix(form): duplicate error displays on invalid form field value

Adds a variable formErrorsTracker that tracks which field identifiers have already pushed an error prompt in the formErrors variable which limits the number of error prompt for every field identifier into 1.

Author: BrianJavier99

src/definitions/behaviors/form.js

@@ -38,6 +38,7 @@
                 element     = this,
 
                 formErrors  = [],
+                formErrorsTracker = {},
                 keyHeldDown = false,
 
                 // set at run-time
@@ -948,7 +949,7 @@
                                     $prompt.css('display', 'none');
                                 }
                                 $prompt
-                                    .appendTo($fieldGroup)
+                                    .appendTo($fieldGroup.filter('.' + className.error))
                                 ;
                             }
                             $prompt
@@ -1285,6 +1286,7 @@
                         $module.removeClass(className.initial);
                         // reset errors
                         formErrors = [];
+                        formErrorsTracker = {};
                         if (module.determine.isValid()) {
                             module.debug('Form has no validation errors, submitting');
                             module.set.success();
@@ -1388,7 +1390,22 @@
                                     var invalidFields = module.validate.rule(field, rule, true) || [];
                                     if (invalidFields.length > 0) {
                                         module.debug('Field is invalid', identifier, rule.type);
-                                        fieldErrors.push(module.get.prompt(rule, field));
+                                        var fieldError = module.get.prompt(rule, field);
+                                        if (!settings.inline) {
+                                            if (
+                                                // Always allow the first error prompt for new field identifiers
+                                                (!(identifier in formErrorsTracker)
+                                                // Also allow multiple error prompts per field identifier but make sure each prompt is unique
+                                                || formErrorsTracker[identifier].indexOf(fieldError) === -1)
+                                                // Limit the number of unique error prompts for every field identifier if specified
+                                                && (!errorLimit || (formErrorsTracker[identifier] || []).length < errorLimit)
+                                            ) {
+                                                fieldErrors.push(fieldError);
+                                                (formErrorsTracker[identifier] = formErrorsTracker[identifier] || []).push(fieldError);
+                                            }
+                                        } else {
+                                            fieldErrors.push(fieldError);
+                                        }
                                         fieldValid = false;
                                         if (showErrors) {
                                             $(invalidFields).closest($group).addClass(className.error);
@@ -1403,7 +1420,7 @@
                                 settings.onValid.call($field);
                             }
                         } else {
-                            if (showErrors) {
+                            if (showErrors && fieldErrors.length > 0) {
                                 formErrors = formErrors.concat(fieldErrors);
                                 module.add.prompt(identifier, fieldErrors, true);
                                 settings.onInvalid.call($field, fieldErrors);