1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
function resolveAfter2Seconds(x) {
return new Promise(resolve => {
setTimeout(() => {
resolve(x);
}, 2000);
});
}
/**
* Add a number.
* @param {number} x - The number to add.
*/
async function add(x) {
var a = resolveAfter2Seconds(20);
var b = resolveAfter2Seconds(30);
return x + await a + await b;
}
/**
* Subtract a number.
* @param {number} x - The number to subtract.
*/
var subtract = async function subtract(x) {
var a = resolveAfter2Seconds(20);
var b = resolveAfter2Seconds(30);
return await a + await b - x;
}
/**
* Adder class.
*/
class Adder {
/**
* Construct an Adder instance.
*/
constructor() {}
/**
* Add a number.
* @param {number} x - The number to add.
*/
async add(x) {}
}