Is there a more efficient way to create a TypeScript type based on an array of strings without duplicating values in an Enum declaration? I am using version 2.6.2 and have a long array of colors that I want to convert into a type.
Here is what I envision:
const colors = ['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet'];
export type Color = convertStringArrayToType(colors);
The existing solution, as described here, does work but seems a bit hacky:
/** Utility function to create a K:V from a list of strings */
function strEnum<T extends string>(o: Array<T>): {[K in T]: K} {
return o.reduce((res, key) => {
res[key] = key;
return res;
}, Object.create(null));
}
/**
* Sample create a string enum
*/
/** Create a K:V */
const Direction = strEnum([
'North',
'South',
'East',
'West'
])
/** Create a Type */
type Direction = keyof typeof Direction;