Promise:使用JavaScript编写异步代码的能力
原文英文,约1000词,阅读约需4分钟。发表于: 。Introduction By nature, Javascript is a synchronous, single-threaded programming language. This means that operations are run one at a time, in the order they were called. Web applications need...
JavaScript是一种单线程的同步语言,异步操作可在后台运行。回调函数处理异步操作,但过多嵌套会导致“回调地狱”。Promise对象提供了更清晰的异步代码结构和错误处理。使用Fetch API可以发起请求并处理响应,Promise的.then()和.catch()方法简化了异步编程。