instance.get("token", { withCredentials: true}) .then(function(response) { console.log(response) }) .catch(function(error){ }); document.getElementById("signin").addEventListener("submit", function(evt){ evt.preventDefault(); var pseudo = document.getElementById("floatingPseudo"); var password = document.getElementById("floatingPassword"); if((password.value.length > 0) || (pseudo.value.length > 0)){ console.log(pseudo.value); instance.get("token", { auth : {username: pseudo.value, password: password.value}, withCredentials: true}) .then(function(response) { console.log(response) }) .catch(function(error){ if(error.response.status == 404){ document.getElementById("alertPassword").classList.remove("hidden"); } }); } }); document.getElementById("closeAlertPassword").addEventListener("click", function(){ document.getElementById("alertPassword").classList.add("hidden"); });