refactored dependant field check

validation.js

@@ -98,16 +98,21 @@ class ValidationField {
 
             // dependant fields
             if (this.dependant) {
-                const parent = this.validationInstance.form.querySelector(`[name=${this.dependant}]`)
+                const parents = this.validationInstance.form.querySelectorAll(`[name="${this.dependant}"]`)
 
                 const depCheck = () => {
-                    parent.value
+                    if (((parents[0].type === 'checkbox' || parents[0].type === 'radio') && this.validationInstance.form.querySelectorAll(`[name="${this.dependant}"]:checked`).length > 0) ||
-                        ? this.el.removeAttribute('disabled')
+                        (((parents[0].type !== 'checkbox' && parents[0].type !== 'radio') && parents[0].value))) {
-                        : this.el.setAttribute('disabled', 'disabled')
+                            this.el.removeAttribute('disabled')
+                        } else {
+                            this.el.setAttribute('disabled', 'disabled')
+                        }
                 }
                 depCheck()
 
-                parent.addEventListener('input', depCheck)
+                for (const parent of parents) {
+                    parent.addEventListener('input', depCheck)
+                }
             }
 
             // add required indicator