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test.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>
</body>
<script>
var p1 = new Promise((resolve, reject) => {
resolve('p1');
});
var p2 = new Promise((resolve, reject) => {
resolve('p2');
});
var p3 = new Promise((resolve, reject) => {
// reject('p3');
// throw new Error('报错了');
resolve('p3');
});
Promise.all([p2, p3, p1].map(p => p.catch(e => '出错后返回的值')))
.then(values => {
console.log(values,'1');
}).catch(err => {
console.log(err,'00');
})
console.log([p2, p3, p1],'-1232');
console.log([p2, p3, p1].map(p => p.catch(e => '出错后返回的值')));
</script>
</html>