promise.all

function setTimeoutPro(name, time, flag = true) {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            console.log("name", name)
            flag ? resolve(name) : reject(name)
        }, time)
    })
}
Promise.all([
    setTimeoutPro("1", 1000),
    setTimeoutPro("2", 2000,false),
    setTimeoutPro("3", 3000),
    setTimeoutPro("4", 450, false)
])
    .then((value) => { console.log("then", value) })
    .catch((e) => { console.log("catch", e) })

返回结果

name 4

catch 4

name 1

name 2

name 3

 

由此可知，promise.all promise的reject不会导致其它promise执行中断，但是只会返回第一个reject