File: narrowingTruthyObject.js

package info (click to toggle)
node-typescript 5.0.4%2Bds1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 459,116 kB
  • sloc: javascript: 1,972,754; makefile: 6; sh: 1
file content (61 lines) | stat: -rw-r--r-- 1,394 bytes parent folder | download | duplicates (4)
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
51
52
53
54
55
56
57
58
59
60
61
//// [narrowingTruthyObject.ts]
function foo(x: unknown, b: boolean) {
    if (typeof x === 'object') {
        x.toString();
    }
    if (typeof x === 'object' && x) {
        x.toString();
    }
    if (x && typeof x === 'object') {
        x.toString();
    }
    if (b && x && typeof x === 'object') {
        x.toString();
    }
    if (x && b && typeof x === 'object') {
        x.toString();
    }
    if (x && b && b && typeof x === 'object') {
        x.toString();
    }
    if (b && b && x && b && b && typeof x === 'object') {
        x.toString();
    }
}

// Repro from #36870

function f1(x: unknown): any {
    return x && typeof x === 'object' && x.hasOwnProperty('x');
}


//// [narrowingTruthyObject.js]
"use strict";
function foo(x, b) {
    if (typeof x === 'object') {
        x.toString();
    }
    if (typeof x === 'object' && x) {
        x.toString();
    }
    if (x && typeof x === 'object') {
        x.toString();
    }
    if (b && x && typeof x === 'object') {
        x.toString();
    }
    if (x && b && typeof x === 'object') {
        x.toString();
    }
    if (x && b && b && typeof x === 'object') {
        x.toString();
    }
    if (b && b && x && b && b && typeof x === 'object') {
        x.toString();
    }
}
// Repro from #36870
function f1(x) {
    return x && typeof x === 'object' && x.hasOwnProperty('x');
}