session 27: async, await, promise

Jeeppy · Apr 26, 2023 · 5078b82 · 5078b82
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diff --git a/session27/index.html b/session27/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <script src="script.js"></script>
+</body>
+</html>
diff --git a/session27/script.js b/session27/script.js
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+
+function chargerScript(script) {
+    return new Promise((resolve, reject) => {
+        let element = document.createElement('script');
+        element.src = script;
+        document.head.append(element);
+
+        element.onload = () => resolve('Fichier ' + script + ' a été chargé');
+
+        element.onerror = () => reject(new Error('Opération impossible pour le script ' + script));
+    });
+}
+
+async function resultat() {
+    try {
+        const scriptA = await chargerScript('test.js');
+        console.log(scriptA);
+        const scriptB = await chargerScript('autre.js');
+        console.log(scriptB);
+    }
+    catch(error) {
+        console.log(error);
+        document.head.lastChild.remove();
+    }
+}
+
+resultat();
+
+// async function direBonjour() {
+//     const promesse = new Promise((resolve, reject) => {
+//         setTimeout(() => resolve('Promesse tenu !'), 3000);
+//     });
+
+//     let resultat = await promesse;
+//     console.log(resultat);
+// }
+
+
+// direBonjour();
diff --git a/session27/test.js b/session27/test.js