5. Async functions 5.1 Overview 5.1.1 Variants 5.1.2 Async functions always return Promises 5.1.3 Handling results and errors of asynchronous computations via await 5.2 Underst...

Review Review As JavaScript continues to mature and grow in its widespread adoption, asynchronous programming is more and more of a central concern. Callbacks are not fully suf...

并发 使用 Promises, 不要使用回调 回调不够简洁， 因为他们会产生过多的嵌套。 在 ES2015/ES6 中， Promises 已经是内置的全局类型了，使用它们吧！ 不好的： require ( 'request' ). get ( 'https://en.wikipedia.org/wiki/Robert_Cecil_Marti...

Promise Trust Calling Too Early Calling Too Late Promise Scheduling Quirks Never Calling the Callback Calling Too Few or Too Many Times Failing to Pass Along Any Parameters/En...

Promise.any() Promise.any() Promise.any() 方法接受一组 Promise 实例作为参数，包装成一个新的 Promise 实例。只要参数实例有一个变成fulfilled 状态，包装实例就会变成fulfilled 状态；如果所有参数实例都变成rejected 状态，包装实例就会变成rejected 状态。该方法目前...

Sequences, Abstraction Design Sequences, Abstraction Design Understanding asynquence begins with understanding a fundamental abstraction: any series of steps for a task, whethe...

Promise实战 具体实现的库 Polyfill 扩展类库 编写Promise代码 创建流程 创建Promise对象 Thenable Promise.reject Promise的同步or异步调用 Promise#catch Promise chain 多个Promise对象完成后统一处理 通过回调方式来进行多个异步调用 使用Pr...

Global Promise Rejection Handling Node.js Rejection Handling Browser Rejection Handling Global Promise Rejection Handling One of the most controversial aspects of promises is...

前言 写作初衷 开始阅读之前 格式约定 推荐浏览器 运行示例代码 本书源代码/License 意见和疑问 前言 写作初衷 本书的目的是以目前还在制定中的ECMAScript 6 Promises 规范为中心，着重向各位读者介绍JavaScript中对Promise相关技术的支持情况。 通过阅读本书，我们希望各位读者能在下面三个目标上有...

Queries Executing Queries are Not Promises References to other documents Streaming Versus Aggregation Next Up Queries Mongoose models provide several static helper functi...