小编Dea*_*hen的帖子

为什么下面的代码无法捕获错误？“捕获”不起作用，错误抛出并退出。我在 nodeJs 8.9 上运行代码

new Promise(function(resolve,reject){
    console.log('construct a promise...')
    setTimeout(() => {
        throw new Error('async operation failure!')
    },1000)
})
.then(() => {
    //never happen
    console.log('happen?wrong!!!')
})
.catch(e => {
    console.warn('execute promise failure! catch it')
})

如果删除 setTimeout，则“捕获”有效

new Promise(function(resolve,reject){
    console.log('construct a promise...')
    throw new Error('async operation failure!')
})
.then(() => {
    //never happen
    console.log('happen?wrong!!!')
})
.catch(e => {
    console.warn('execute promise failure! catch it')
})

为什么会这样？请帮忙，谢谢！