How can I convert a string to an enum in TypeScript?
I have defined the following enum in TypeScript:
enum Color { Red, Green } In my function, I receive the color as a string. I tried the following code: var green = “Green”; var color: Color = green; // Error: can’t convert string to enum
How can I properly convert a string value to a Color enum using TypeScript? I’m looking for a solution to convert a typescript string to enum.
Hey Archna.vv,
Using a Custom Mapping Function : If you want more control or need to handle cases where the string might not directly map to an enum value, you can create a custom mapping function.
enum Color { Red, Green }
function stringToEnum(value: string): Color | undefined { switch (value) { case “Red”: return Color.Red; case “Green”: return Color.Green; default: return undefined; // or throw an error if you prefer } }
const colorName = “Green”; const color: Color | undefined = stringToEnum(colorName);
console.log(color); // Output: 1 (Green’s numeric value)
Hey Archana,
Using a Custom Mapping Function : If you want more control or need to handle cases where the string might not directly map to an enum value, you can create a custom mapping function.
enum Color { Red, Green }
function stringToEnum(value: string): Color | undefined { switch (value) { case “Red”: return Color.Red; case “Green”: return Color.Green; default: return undefined; // or throw an error if you prefer } }
const colorName = “Green”; const color: Color | undefined = stringToEnum(colorName);
console.log(color); // Output: 1 (Green’s numeric value)