参考: 现代 JavaScript 教程 (opens new window)
参考:
进度: 简介:回调 (opens new window) Promise (opens new window) Promise 链 (opens new window) 使用 promise 进行错误处理 (opens new window) Promise API (opens new window) Promisification (opens new window) 微任务(Microtask) (opens new window) Async/await (opens new window)
进度:
Promise
resolve
reject
Promise.all(promises)
Promise.all
Promise.all(iterable)
iterable
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