File: typeGuardNarrowsToLiteralTypeUnion.js

package info (click to toggle)
node-typescript 3.3.3333-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 324,548 kB
  • sloc: makefile: 6; sh: 3
file content (21 lines) | stat: -rw-r--r-- 438 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
//// [typeGuardNarrowsToLiteralTypeUnion.ts]
declare function isFoo(value: string) : value is ("foo" | "bar");
declare function doThis(value: "foo" | "bar"): void;
declare function doThat(value: string) : void;
let value: string;
if (isFoo(value)) {
    doThis(value);
} else {
    doThat(value);
}



//// [typeGuardNarrowsToLiteralTypeUnion.js]
var value;
if (isFoo(value)) {
    doThis(value);
}
else {
    doThat(value);
}