ajax({
 url: "/list",
 type: "GET",
 success: function(data) {
 appendToDOM(data);
 ajax({
 url: "/update",
 type: "POST",
 success: function(data) {
 util.toast("Success!");
 })
 });
 }
});

new Promise(resolve => {
 ajax({
 url: "/list",
 type: "GET",
 success: data => resolve(data);
 })
}).then(data => {
 appendToDOM(data);
 ajax({
 url: "/update",
 type: "POST",
 success: function(data) {
 util.toast("Successfully!");
 }) 
 }); 
});

let orderPromise = new Promise(resolve => {
 ajax("/order", "GET", data => resolve(data));
});
let userPromise = new Promise(resolve => {
 ajax("/user", "GET", data => resolve(data));
});

Promise.all([orderPromise, userPromise]).then(values => {
 let order = values[0],
 user = values[1];
});

// 使用await获取异步数据
let leadList = await new Promise(resolve => {
 ajax({
 url: "/list",
 type: "GET",
 success: data => resolve(data);
 });
});

// await让代码很自然地像瀑布流一样写下来 
appendToDom(leadList);
ajax({
 url: "/update",
 type: "POST",
 success: () => util.toast("Successfully");
});

let order = await new Promise(
 resolve => ajax("/order", data => resovle(data))),

 user = await new Promise(
 resolve => ajax("/user", data => resolve(data)));

// do sth. with order/user

let quoteHandler = require("./quote");
// 弹出框询问用户并得到用户的选择
let createType = await quoteHandler.confirmCreate();

let quoteHandler = {
 confirmCreate: function(){
 dialog.showDialog({
 contentTpl: tpl,
 className: "confirm-create-quote"
 });
 let $quoteDialog = $(".confirm-create-quote form")[0];
 return new Promise(resolve => {
 $(form.submit).on("click", function(event){
 resolve(form.createType.value);
 });
 });
 }

}

npm install --save-dev babel-plugin-transform-async-to-generator

{
 "plugins": ["transform-async-to-generator"]
}

require("babel-polyfill");

async showOrderDialog() {
 // 获取创建类型
 let createType = await quoteHandler.confirmCreate();

 // 获取老订单数据 
 let orderInfo = await orderHandler.getOrderData();
}

function sleep (time) {
 return new Promise(resolve => 
 setTimeout(() => resolve(), time));
}

async function start () {
 await sleep(1000);
}

start();

while (1) {
 switch (_context.prev = _context.next) {
 case 0:
 _context.next = 2;
 // sleep返回一个Promise对象
 return sleep(1000);

 case 2:
 case "end": 
 return _context.stop();
 }
}

let quoteHandler = {
 confirmCreate: function(){
 $(form.submit).on("click", function(event){
 // 这里会抛undefined异常：访问了undefined的value属性
 callback(form.notFoundInput.value);
 });
 }
}

try {
 // 这里无法捕获到异常
 quoteHandler.confirmCreate();
} catch (e) {

}

let quoteHandler = {
 confirmCreate: function(){
 return new Promise(resolve => {
 $(form.submit).on("click", function(event){
 // 这里会抛undefined异常：访问了undefined的value属性
 resolve(form.notFoundInput.value);
 });
 });
 }
}

quoteHandler.confirmCreate().then(createType => {

}).catch(e => {
 // 这里能捕获异常
});

try {
 createType = await quoteHandler.confirmCreate("order");
}catch(e){
 console.log(e);
 return;
}