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by Ryo Hanafusa @softoika
The enum is an original syntax of TypeScript (it does not exist in JavaScript). So it is converted to like the following form as a result of transpilation:
let OperatingSystem;
(function (OperatingSystem) {
OperatingSystem[OperatingSystem["MacOS"] = 0] = "MacOS";
OperatingSystem[OperatingSystem["Windows"] = 1] = "Windows";
OperatingSystem[OperatingSystem["Linux"] = 2] = "Linux";
})(OperatingSystem || (OperatingSystem = {}));
In this question, the type should convert a given string tuple to an object that behaves like an enum. Moreover, the property of an enum is preferably a pascal case.
Enum<["macOS", "Windows", "Linux"]>
// -> { readonly MacOS: "macOS", readonly Windows: "Windows", readonly Linux: "Linux" }
If true
is given in the second argument, the value should be a number literal.
Enum<["macOS", "Windows", "Linux"], true>
// -> { readonly MacOS: 0, readonly Windows: 1, readonly Linux: 2 }
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