相当于是一个语法糖
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>catch方法</title>
</head>
<body>
<script>
const p = new Promise((resolve, reject)=>{
setTimeout(()=>{
//设置 p 对象的状态为失败, 并设置失败的值
reject("出错啦!");
}, 1000)
});
// p.then(function(value){}, function(reason){
// console.error(reason);
// });
p.catch(function(reason){
console.warn(reason);
});
</script>
</body>
</html>
