Given the key STEPS.GENDER and the string enum below
export enum STEPS {
NAME = "name",
GENDER = "gender",
BIRTHDAY = "birthday",
SUCCESS = "success"
}
Is there a way to programmatically determine the next or previous key in the enum, such as STEPS.BIRTHDAY and STEPS.NAME in this particular case?
Note: Or any other key related to the current key where the relationship can be defined. If no matching key is found, return undefined.
Here is how a string enum gets transpiled to JavaScript:
var PROCESSES;
(function (PROCESSES) {
PROCESSES["START"] = "start";
PROCESSES["PAUSE"] = "pause";
PROCESSES["RESUME"] = "resume";
PROCESSES["END"] = "end";
})(PROCESSES || (PROCESSES = {}));
With this in mind:
enum PROCESSES {
START = "start",
PAUSE = "pause",
RESUME = "resume",
END = "end"
}
const values = Object.values(PROCESSES);
const index = values.indexOf(PROCESSES.PAUSE);
const nextStep: PROCESSES = values[index + 1];
console.log(nextStep);
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