<!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>async&await</title> </head> <body> <script> function getTime() { return new Promise((resolve, reject) => { setTimeout(function () { resolve(3); }, 1000); }); } async function sum() { let time = await getTime().catch(err => console.log(err)); console.log(time); } sum(); </script> </body> </html>