<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Promise API - resolve</title>
</head>
<body>
<script>
//
let p1 = Promise.resolve(521);
//如果传入的参数为 非Promise类型的对象, 则返回的结果为成功promise对象
//如果传入的参数为 Promise 对象, 则参数的结果决定了 resolve 的结果
let p2 = Promise.resolve(new Promise((resolve, reject) => {
// resolve('OK');
reject('Error');
}));
// console.log(p2);
p2.catch(reason => {
console.log(reason);
})
</script>
</body>
</html>
