Creating an enumeration within a class

I'm encountering difficulties when trying to declare an enum element within a class. Despite attempting various methods to declare the enum, I am unable to make it function properly.

Here is the (non-functional) class:

export class Device extends Electronics {
    public OS: string = '';
    protected ready: boolean = false;
    protected enum numbers {one, two, three};

    constructor(OS: string, ready: boolean, numbers: enum) {
        this.OS = OS;
        this.ready = ready;
        this.numbers = numbers;
    }
}

I have also explored these alternatives:

protected {one, two, three}numbers: enum;

and

protected numbers{one, two, three}: enum;

as well as

protected numbers: enum{one, two, three};

and

protected numbers: enum = {one, two, three};

None of these approaches seem to be effective. Therefore, I must be overlooking something, as I am currently struggling to comprehend how enums operate. (Despite consulting TypeScript documentation and multiple sources for additional information without success)

Answer №1

Ensure that when passing the value of 'numbersEnumType' as the 3rd parameter to the constructor, it is not considered a local type declaration:

enum numbersEnumType {one, two, three};

class Device {
    public OS: string = '';
    protected ready: boolean = false;
    protected numbers: numbersEnumType;

    constructor(OS: string, ready: boolean, numbers: numbersEnumType) {
        this.OS = OS;
        this.ready = ready;
        this.numbers = numbers;
    }
}

Here's a shorter way to declare it:

class Device {
    constructor(public OS: string = '', protected ready: boolean = false, protected numbers: numbersEnumType) {
    }
}

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