Example :
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>JavaScript</title>
</head>
<body>
<script>
//promise example
let promiseToCleanTheRoom = new Promise(function (resolve,reject){
//clean the room code here
let clean = false;
if(clean){
resolve('Clean');
}else{
reject('Not Clean');
}
});
promiseToCleanTheRoom.then(function(fromResolve){
console.log('The room is : '+fromResolve);
}).catch(function(fromReject){
console.log('The room is '+fromReject);
});
</script>
</body>
</html>
