05_Promise_all: <hr>
press F12

<script>
var p1 = new Promise(function (resolve, reject) {
    setTimeout(resolve, 500, 'P1-parameters1', 'P1-para2');
});

var p2 = new Promise(function (resolve, reject) {
    setTimeout(resolve, 100, 'P2-fastest');
});

var p3 = new Promise(function (resolve, reject) {
    setTimeout(resolve, 200, 'P3-para1');
});


// 只需要获取返回最快的，其他的丢弃。
Promise.race([p1, p2, p3]).then(function (results) {
    console.log(results); // 获得一个Array: ['P1', 'P2']
});
</script>