document.addEventListener("DOMContentLoaded", function(){ function formulaire_ingredient_update(event) { event.preventDefault(); console.log(event); let form = document.getElementById("recette-form-ingr-add"); let cible = document.getElementById("recette-form-ingr"); let ingr = form.elements["ingr-nom"]; let new_elem = document.createElement("option"); new_elem.setAttribute("value",ingr.value); new_elem.innerText = ingr.value; cible.appendChild(new_elem); } let ingr_btn = document.getElementById("recette-form-ingr-add"); console.log(ingr_btn) ingr_btn.addEventListener('submit', formulaire_ingredient_update); })