Javascript异步编程 ​

callback => 事件监听 => 发布订阅 => promise => generator => async/await

回调函数 ​

ajax

事件监听 ​

click

发布订阅 ​

eventbus

promise ​

迭代器generator ​

// what is a generator
function *gen() {};
g = gen();
typeof g.next === "function" && typeof g.throw === "function"

async/await ​