Promise.js 入门指南
Think of a promise like ordering food at a restaurant you don’t get the meal immediately, but you do get a receipt (the promise) that guarantees your food will come (or you’ll get an explanation...
承诺类似于餐厅点餐,分为待处理、已完成和已拒绝三种状态,状态一旦确定无法更改。承诺比回调更简洁,支持链式调用。async/await是承诺的语法糖,用于处理异步任务。使用Promise.all()可以并行执行多个独立操作,提高性能。
