async/await是什么
时间: 2023-08-27 13:14:15 浏览: 106
async/await是用于处理异步操作的一种语法糖。async用于申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函数返回一个Promise对象,可以使用then()方法进行链式调用,而await关键字则可以暂停async函数的执行,等待Promise对象的结果返回。async/await的使用可以使异步代码更加简洁易读,避免了回调地狱的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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