promise then failure catch
2018-09-02 本文已影响6人
peerben
(new Promise(function(resolve, reject) {
resolve('aa');
})).then(val => { console.log(val); throw new Error('aaa');}).catch((err)=> console.log('err' + err));
aa
errError: aaa
(new Promise(function(resolve, reject) {
resolve('aa');
})).then(val => {
console.log(val);
throw new Error('aaa');
}).then((a)=>a, (val) => { console.log('reject'); }).catch((err)=> console.log('err' + err));
aa
reject
(new Promise(function(resolve, reject) {
resolve('aa');
})).then(val => {
console.log(val);
throw new Error('aaa');
}).then((a)=>a).catch((err)=> console.log('err' + err));
aa
errError: aaa
