async处理catch错误问题

async () => {
const fetchData = () => {
return new Promise((resolve, reject) => {
setTimeout(() => {
resolve('fetch data')
}, 1000)
})
}

// 抽离成公共方法
const awaitWrap = (promise) => {
return promise
.then(data => [null, data])
.catch(err => [err, null])
}

const [err, data] = await awaitWrap(fetchData())
console.log('err', err)
console.log('data', data)
// err null
// data fetch data
}