function fetch() {
    return new Promise((resolve, reject) => {
        setTimeout(() => { reject('err') }, 1000)
    })
}

function load(onError) {
    const p = fetch();
    return p.catch(err => {
        return new Promise((resolve, reject) => {
            const retry = () => resolve(load(onError))
            const fail = () => reject(err)
            onError(retry, fail)
        })
    })
}
load((retry, fail) => {
    console.log('重试')
    retry();
}).then(res => {
    console.log(res)
})