feat: add email validation and toggle 'is-invalid' class for inputs with 'email-input' class

EnvelopeGenerator.Web/wwwroot/js/event-binder.js

@@ -35,6 +35,15 @@ $('.btn_reject').click(_ =>
             Swal.showValidationMessage(`Request failed: ${res.message}`);
     }));
 
+document.querySelectorAll('.email-input').forEach(input => {
+    input.addEventListener('input', function() {
+        if (/^\S+@\S+\.\S+$/.test(this.value)) {
+            this.classList.remove('is-invalid');
+        } else {
+            this.classList.add('is-invalid');
+        }
+    });
+});
 
 class Comp {
     static ActPanel = class {