frontend user input handling

web/src/lib/helpers.js

@@ -0,0 +1,5 @@
+export const isEmailValid = email => {
+  let validEmailRegex = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+
+  return validEmailRegex.test (email);
+};