Javascript Enum To Corresponding String Value

Question

So I have this in the javascript for my page:

var TEST_ERROR  = {
        \'SUCCESS\'   :   0,
        \'FAIL\'      :   -1,
        \'ID_ERROR\'  :   -2
            


        

Answer 1

The best way to do it is:

export const UserLevel = Object.freeze({
   BABY: 1,
   CHILED: 2
});

Why we need to add freeze UserLevel is const but we can change the values inside, so freeze will make it safe for changes.

Answer 2

If you are typescript, then you will already have a definition for the enum. Else you can directly use the JS version of the enum.

var Status;
(function (Status) {
    Status[Status["New"] = 0] = "New";
    Status[Status["Submitted"] = 1] = "Submitted";
    Status[Status["Approved"] = 2] = "Approved";
    Status[Status["Rejected"] = 3] = "Rejected";
})(Status || (Status = {}));
var snew = Status.New;
console.log(snew); //This is the number
console.log(Status[snew]); //This is the string