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
44
45
46
47
48
49
50
|
//// [weakTypeAndPrimitiveNarrowing.ts]
type LiteralsAndWeakTypes =
| 'A'
| 'B'
| { optional?: true }
| { toLowerCase?(): string }
| { toUpperCase?(): string, otherOptionalProp?: number };
const g = (arg: LiteralsAndWeakTypes) => {
if (arg === 'A') {
arg;
} else {
arg;
}
}
type PrimitivesAndWeakTypes =
| string
| number
| { optional?: true }
| { toLowerCase?(): string }
| { toUpperCase?(): string, otherOptionalProp?: number };
const h = (arg: PrimitivesAndWeakTypes) => {
if (arg === 'A') {
arg;
} else {
arg;
}
}
//// [weakTypeAndPrimitiveNarrowing.js]
"use strict";
var g = function (arg) {
if (arg === 'A') {
arg;
}
else {
arg;
}
};
var h = function (arg) {
if (arg === 'A') {
arg;
}
else {
arg;
}
};
|
