I am facing an issue where I receive a string value as a parameter in a component, but I want to restrict the possible values that can be passed as a parameter, similar to using an enum.
Currently, I have:
@Input() type: string = '';
However, any value can be assigned to the type property within the component. I need to limit this to just 3 specific options, similar to how an Enum works.
Give this a shot:
@Input() type: 'option1' | 'option2' | 'option3';
This employs the TypeScript union type that allows for any of the specified options - x or y or z, and so on.
Alternatively, you can utilize a TypeScript enum
To create an Enum in TypeScript, you can define the possible values within the enum and then set the type of your variable to be that enum type. This way, only the specified values in the enum will be allowed for that variable, otherwise it will default to undefined.
enum MyEnum {
First,
Second,
Third
}
@Input() type: MyEnum;
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