<template>
    <div>
        <h1>page1</h1>
        <p>{{ msg }}</p>
        <el-button type="primary" plain @click="downloadList()">主要按钮</el-button>
    </div>
</template>
<script>
export default {
    data() {
        return {
            msg: "我是page1组件",
            pagnation:{
                total:1000,
            }
        }
    },
    methods: {
        downloadList(num) {
            let array = []
            // 计算可以循环多少次
            let n = 1
            if (this.pagnation.total < 100) {
                n = 1
            } else {
                n = Math.ceil(this.pagnation.total / 100)
            }
            for (let i = 0; i < n; i++) {
                array = array.concat(this.ForPromise(i))
            }
            Promise.all(array).then((res) => {
                console.log(res) // [ 0, 1, 2 ]
            })
        },
        ForPromise(num) {
            return new Promise((resolve, reject) => {
                resolve('成功了'+num);
                //请求操作
                // this.axios.get('http://test.fastadmin.cn/index.php/api/index/test',{}).then(res => {}).catch(err => {});
            })
        },
        sleep(ms) { //sleep延迟方法2
            var unixtime_ms = new Date().getTime();
            while (new Date().getTime() < unixtime_ms + ms) { }
        },

    }
}
</script>

var p1 = new Promise(function(resolve, reject) {
  setTimeout(resolve, 500, "one");
});
var p2 = new Promise(function(resolve, reject) {
    setTimeout(resolve, 100, "two");
});

Promise.race([p1, p2]).then(function(value) {
    console.log(value); // "two"
    // 两个都完成，但 p2 更快
});