File: typeGuardNarrowsToLiteralType.js

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node-typescript 2.1.5-1~bpo8%2B1
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//// [typeGuardNarrowsToLiteralType.ts]
declare function isFoo(value: string) : value is "foo";
declare function doThis(value: "foo"): void;
declare function doThat(value: string) : void;
let value: string;
if (isFoo(value)) {
    doThis(value);
} else {
    doThat(value);
}



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