async和await是干什么的
时间: 2023-08-17 07:13:31 浏览: 43
async和await是用于处理异步操作的关键字。async用于声明一个函数是异步的,而await用于等待一个异步方法执行完成。async函数会返回一个Promise对象,可以通过await关键字来等待这个Promise对象的结果。在有嵌套请求的情况下,使用async/await可以更直观地处理异步操作,避免了回调地狱的问题。\[1\]\[2\]\[3\]
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