diff --git a/ProjetProgWeb/api.php b/ProjetProgWeb/api.php
index f7e3885..8bfb4ab 100644
--- a/ProjetProgWeb/api.php
+++ b/ProjetProgWeb/api.php
@@ -3,18 +3,24 @@
 require_once("class/dump.php");
 
 if (!isset($_GET['q']) || !isset($_GET['author'])) {
-    print_r(json_encode(array("status" => 400, "message" => "Missing query type or attributs.")));
+    print_r(json_encode(array("status" => 400, "message" => "Missing query type or attributes.")));
     exit();
 }
 
-$author_name = $_GET['author'];
+$author_name = filter_var($_GET['author'], FILTER_SANITIZE_ADD_SLASHES);
 $q = $_GET['q'];
 
+if (strlen($author_name) < 3) {
+    print_r(json_encode(array("status" => 400, "message" => "Le nom de l'auteur doit comporter un minimum de 3 caractères.")));
+    exit();
+}
+
 $json_object = match ($q) {
     "theses" => dump::getTheseByAuthor($author_name),
     "authors" => dump::getAuthorsByAuthors($author_name),
     default => NULL,
 };
 
+// TODO : Rajouter la structure status message data
 $json = json_encode($json_object);
 print_r($json);
diff --git a/ProjetProgWeb/app.js b/ProjetProgWeb/app.js
index 9a9a5d1..3e6484e 100644
--- a/ProjetProgWeb/app.js
+++ b/ProjetProgWeb/app.js
@@ -3,15 +3,24 @@ let searchBar = document.querySelector('#searchbar')
 let searchBarButton = document.querySelector('#search-button')
 let suggestions = document.querySelector('#suggestions')
 let loader = document.querySelector('.loader')
+let error = document.querySelector("#error")
+let errorMessage = document.querySelector("#error-message")
+let errorButton = document.querySelector("#error-button")
 
 let authorName = "";
+let lastRequest = null
 
 function requestToApi(author) {
-    loader.style.display = "block"
-    authorName = author
-    fetch(`api.php?q=theses&author=${author}`)
-        .then(response => response.json())
-        .then(data => displayResults(data))
+    if (lastRequest === null || (new Date().getTime() - lastRequest) > 1000) {
+        lastRequest = new Date().getTime()
+        loader.style.display = "block"
+        authorName = author
+        fetch(`api.php?q=theses&author=${author}`)
+            .then(response => response.json())
+            .then(data => displayResults(data))
+    } else {
+        alert('Veuillez attendre une seconde entre chaque recherche.')
+    }
 }
 
 let elementsToFade = null
@@ -26,6 +35,17 @@ function fadeIn() {
 
 // TODO : Faire un système de page plutôt que de charger 10000 résultats en une fois s'il y en a 10000..
 function displayResults(results) {
+
+    if (results.status === 400) {
+        loader.style.display = "none"
+        error.classList.add("fade-in");
+        errorMessage.innerHTML = results.message
+        return;
+    }
+
+    document.querySelector('#results-count').innerHTML = ""
+    document.querySelector('#results').innerHTML = ""
+
     let count = 0
 
     results.forEach(elem => {
@@ -54,15 +74,15 @@ function displayResults(results) {
 }
 
 let lastSearch = ""
-let last = new Date().getTime()
+let lastSuggestion = new Date().getTime()
 let suggestionsDisplayed = false
 
 function realTimeDisplay() {
     let search = document.getElementsByName("author")[0].value
-    if (search.length > 3 && (search !== lastSearch || (new Date().getTime() - last) > 500)) {
+    if (search.length > 3 && (search !== lastSearch || (new Date().getTime() - lastSuggestion) > 500)) {
         showSuggestions()
         lastSearch = search
-        last = new Date().getTime()
+        lastSuggestion = new Date().getTime()
         fetch(`api.php?q=authors&author=${search}`)
             .then(response => response.json())
             .then(function(data) {
@@ -71,8 +91,6 @@ function realTimeDisplay() {
                     let name = document.createElement('p')
                     name.innerHTML = elem
                     name.addEventListener('click', () => {
-                        document.querySelector('#results-count').innerHTML = ""
-                        document.querySelector('#results').innerHTML = ""
                         searchBar.value = elem
                         requestToApi(elem)
                     })
@@ -87,20 +105,18 @@ function showSuggestions() {
         navbarForm.style.borderRadius = '15px 15px 0 0'
         suggestions.style.display = 'block'
         searchBarButton.style.boxShadow = 'none'
-        searchBarButton.classList.remove('animation-in')
-        searchBarButton.classList.add('animation-out')
+        searchBarButton.classList.replace('animation-in', 'animation-out')
         suggestionsDisplayed = true
     }
 }
 
-document.addEventListener('click', function (e){
+document.addEventListener('click', e => {
     if (e.target.id !== 'suggestions' && e.target !== searchBar && e.target !== searchBarButton) {
         if (suggestionsDisplayed) {
             navbarForm.style.borderRadius = '15px'
             suggestions.style.display = 'none'
             searchBarButton.style.boxShadow = 'rgba(0, 0, 0, 0.15) 4px 2px 5px'
-            searchBarButton.classList.remove('animation-out')
-            searchBarButton.classList.add('animation-in')
+            searchBarButton.classList.replace('animation-out', 'animation-in')
             suggestionsDisplayed = false
         }
 
@@ -116,5 +132,16 @@ document.addEventListener('click', function (e){
                 cross.classList.remove('spin-fade')
             }
         }
+
+        if (e.target === errorButton) {
+            error.classList.replace('fade-in', 'fade-out')
+        }
     }
 })
+
+navbarForm.addEventListener('submit', e => {
+    e.preventDefault()
+    let data = new FormData(navbarForm)
+    searchBar.blur()
+    requestToApi(data.get('author'))
+})
diff --git a/ProjetProgWeb/index.php b/ProjetProgWeb/index.php
index ee46469..3827ab2 100644
--- a/ProjetProgWeb/index.php
+++ b/ProjetProgWeb/index.php
@@ -6,7 +6,7 @@
               content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
         <meta http-equiv="X-UA-Compatible" content="ie=edge">
         <link rel="stylesheet" href="stylesheet.css">
-        <title>Document</title>
+        <title>Theses FR</title>
     </head>
     <body>
         <?php
@@ -32,19 +32,14 @@
         <div id="results-count"></div>
         <div id="results"></div>
 
-        <script src="app.js"></script>
+        <div id="error">
+            <div id="error-message"></div>
+            <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" id="error-button">
+                <path d="M23.954 21.03l-9.184-9.095 9.092-9.174-2.832-2.807-9.09 9.179-9.176-9.088-2.81 2.81 9.186 9.105-9.095 9.184 2.81 2.81 9.112-9.192 9.18 9.1z"/>
+            </svg>
+        </div>
 
-        <?php
-        if (isset($_GET['author'])) {
-            if (strlen($_GET['author']) < 3) {
-                echo "<p class='error'>Veuillez entrer 3 caractères minimum.</p>";
-            } else {
-                echo "<script>requestToApi('" . filter_var($_GET['author'], FILTER_SANITIZE_ADD_SLASHES) . "')</script>";
-            }
-        } else {
-            echo "<script>document.getElementsByClassName('loader')[0].style.display = \"none\"</script>";
-        }
-        ?>
+        <script src="app.js"></script>
 
     </body>
 </html>
diff --git a/ProjetProgWeb/navbar.php b/ProjetProgWeb/navbar.php
index fa07a2f..b3d6de7 100644
--- a/ProjetProgWeb/navbar.php
+++ b/ProjetProgWeb/navbar.php
@@ -9,10 +9,10 @@
         </svg>
 
         <div class="research-section">
-            <form action="index.php" method="GET" class="navbar-form">
+            <form class="navbar-form">
                 <input type="text" name="author" placeholder="nom auteur" onkeyup="realTimeDisplay()" id="searchbar">
-                <button>
-                    <img src="assets/search.svg" alt="search" id="search-button">
+                <button id="form-button">
+                    <img src="assets/search.svg" alt="search" id="search-button" class="animation-in">
                 </button>
             </form>
             <div id="suggestions"></div>
diff --git a/ProjetProgWeb/stylesheet.css b/ProjetProgWeb/stylesheet.css
index a3619ce..55c7be2 100644
--- a/ProjetProgWeb/stylesheet.css
+++ b/ProjetProgWeb/stylesheet.css
@@ -2,6 +2,7 @@
 
 * {
     box-sizing: border-box;
+    font-family: sans-serif;
 }
 
 body {
@@ -23,7 +24,6 @@ body {
     height: 75px;
     padding: 10px;
     width: 100%;
-    font-family: sans-serif;
 }
 
 .research-section {
@@ -139,7 +139,6 @@ body {
 }
 
 #results {
-    font-family: sans-serif;
     margin: 10px;
     display: flex;
     flex-direction: column;
@@ -147,7 +146,6 @@ body {
 }
 
 #results-count {
-    font-family: sans-serif;
     opacity: 50%;
     margin: 0 15px 0 15px;
 }
@@ -168,14 +166,49 @@ body {
     transform: translateX(0px);
     animation-fill-mode: forwards;
 }
+.fade-out {
+    animation: fade-out 250ms linear;
+    transition: 250ms;
+    transform: translateX(0px);
+    animation-fill-mode: forwards;
+}
 @keyframes fade-in {
     from { opacity: 0 }
     to { opacity: 100% }
 }
+@keyframes fade-out {
+    from { opacity: 100% }
+    to { opacity: 0 }
+}
 
-/*TODO : Faire une belle erreur*/
-.error {
-    color: red;
+#error {
+    opacity: 0;
+    display: flex;
+    align-items: center;
+    background-color: #FF6F6F;
+    border: solid 3px #DE6161;
+    border-radius: 5px;
+    color: #302B2B;
+    width: 90%;
+    padding: 10px;
+    position: fixed;
+    bottom: 10px;
+    align-self: center;
+}
+
+#error-button {
+    fill: #302B2B;
+    width: 20px;
+    height: 20px;
+    background: #DE6161;
+    border-radius: 1px;
+    padding: 2px;
+    margin-left: auto;
+    border: 1px solid #824D4D;
+}
+
+#error-button:hover {
+    background: #CA5D5D;
 }
 
 .loader {