How do I convert a string to enum in TypeScript?

Converting a String to Enum in TypeScript: A Handy Guide 🚀

Have you ever struggled to convert a string to an enum in TypeScript? 🤔 If you have, fear not! In this blog post, we will explore a simple and effective way to solve this common issue.

Understanding the Problem ⚡️

Let's start by taking a look at the problem statement. We have an enum called Color, which defines the possible colors as Red and Green. However, we receive the color as a string and need to convert it to the corresponding enum value.

The code snippet provided in the question seems logical at first glance:

var green = "Green";
var color: Color = <Color>green; // Error: can't convert string to enum

Unfortunately, TypeScript throws an error since we cannot directly assign a string to an enum. But don't worry, we have a solution!

Converting a String to Enum Value 🎉

To convert a string to an enum value in TypeScript, we need a two-step approach:

1. Create a helper function that performs the conversion.

2. Invoke the helper function to convert the string to its corresponding enum value.

Let's dive into the code! 💻

enum Color{
    Red, Green
}

function convertStringToEnumValue(value: string, enumeration: any): any {
    return enumeration[value];
}

var green = "Green";
var color: Color = convertStringToEnumValue(green, Color);

In the convertStringToEnumValue function, we pass the string value and the enum type as parameters. Inside the function, we use the enumeration object to map the string to its corresponding enum value. 🗺️

Example: Get Ready to Level Up! 🚀

Imagine you have a function that takes a color as a string and does something cool with it. Let's enhance our code snippet to demonstrate this functionality:

enum Color{
    Red, Green
}

function convertStringToEnumValue(value: string, enumeration: any): any {
    return enumeration[value];
}

function doSomethingWithColor(color: Color): void {
    switch (color) {
        case Color.Red:
            console.log("Red Alert! 🚨");
            break;
        case Color.Green:
            console.log("Green Light! 🟢");
            break;
        default:
            console.log("Unknown Color. 😕");
            break;
    }
}

var receivedColor = "Red";
var color: Color = convertStringToEnumValue(receivedColor, Color);
doSomethingWithColor(color);

In this example, we receive the color as a string ("Red") and convert it to the corresponding enum value using our helper function convertStringToEnumValue(). With the converted enum value, we can now perform some cool action based on the color! 🎨

Feel free to modify the example and experiment with different colors and actions. Let your creativity flow! 💡

Share Your Experience! 💬

Have you ever encountered difficulties while converting a string to an enum in TypeScript? Share your experience with us in the comments below! Let's learn and grow together as a community. 🌱

Remember, learning is fun when shared! So why not share this blog post with your fellow TypeScript enthusiasts? Spread the knowledge and help others overcome the string-to-enum conversion hurdle. 🌟

Happy coding! 💻🔥