function resolveAfter2Seconds(x){ return new Promise(resolve => { setTimeout(() => { resolve(x) }, 2000) });}async function f1() { var x = await resolveAfter2Seconds(10); console.log(x)}f1() 来自慕课：
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function resolveAfter2Seconds(x){ return new Promise(resolve => { setTimeout(() => { resolve(x) }, 2000) });}async function f1() { var x = await resolveAfter2Seconds(10); console.log(x)}f1() 来自慕课：
转载于:https://www.cnblogs.com/aiyr/p/10609960.html