add event submit

web/js/login.js

@@ -1,5 +1,14 @@
 instance.get("token", { withCredentials: true})
     .then(function(response) { console.log(response) })
     .catch(function(error){
-        
-    });
+
+    });
+
+document.getElementById("signin").addEventListener("submit", function(evt){
+    evt.preventDefault();
+    var email = document.getElementById("floatingEmail");
+    var password = document.getElementById("floatingPassword");
+    if((password.value.length > 0) || (email.value.length > 0)){
+        console.log("request");
+    }
+})