手写简易promise.all

promise.all = function(promiseArr) {
    let len = promiseArr.length;
    let data= [];
    let count= 0; // 存储成功数量
    return new Promise((resovle,reject) => {
        promiseArr.forEach(async (v,index) => {
            promise.resovle(v).then(res => {
                data[index] = res;
                count++;
                if(len === count){
                    resovle(data)
                }
            }).catch(err => {
                reject(err);  
            })
        })
    })
}