To convert a string to an enum in TypeScript, you can use the “enum’s string values”.
Here’s a step-by-step guide to help you achieve this:
Step 1: Define the Enum
enum MyEnum {
ValueA = "VALUE_A",
ValueB = "VALUE_B",
ValueC = "VALUE_C",
}
Step 2: Create a function to convert the string to the Enum type
function stringToEnum(value: string): MyEnum | null {
if (Object.values(MyEnum).indexOf(value) >= 0) {
return value as MyEnum;
}
return null;
}
Step 3: Use the function to convert a string to the Enum
const stringValue: string = "VALUE_A";
const enumValue: MyEnum | null = stringToEnum(stringValue);
if (enumValue !== null) {
console.log("Converted string to Enum:", enumValue);
} else {
console.log("Invalid string value");
}
In this code, Object.values(MyEnum).includes(value) checks if the given value exists in the Enum’s values. If it does, the function returns the value as the Enum type. If not, it returns null.
Example
enum MyEnum {
ValueA = "VALUE_A",
ValueB = "VALUE_B",
ValueC = "VALUE_C",
}
function stringToEnum(value: string): MyEnum | null {
if (Object.values(MyEnum).includes(value)) {
return value as MyEnum;
}
return null;
}
let stringValue: string = "VALUE_A";
const enumValue: MyEnum | null = stringToEnum(stringValue);
if (enumValue !== null) {
console.log("Converted string to Enum:", enumValue);
} else {
console.log("Invalid string value");
}
That’s it.

Niva Shah is a Software Engineer with over eight years of experience. She has developed a strong foundation in computer science principles and a passion for problem-solving.