How do I use try-catch in TypeScript?

How do I use try-catch in TypeScript?

In TypeScript, you can use try-catch to handle exceptions. Here's a basic example:

try {
    // Code that may throw an error
    let result = riskyFunction();
} catch (error) {
    // Handle the error
    console.error('Error occurred:', error);
}

Can I catch specific types of errors?

Yes, you can check the type of the error in the catch block. For example:

try {
    // Some code
} catch (error) {
    if (error instanceof TypeError) {
        console.error('Type error:', error);
    } else {
        console.error('Other error:', error);
    }
}

What if I want to throw a custom error?

You can create a custom error class and throw it like this:

class CustomError extends Error {
    constructor(message: string) {
        super(message);
        this.name = 'CustomError';
    }
}

throw new CustomError('This is a custom error!');

Is there a way to finally execute code after try-catch?

Yes, you can use the finally block to execute code regardless of whether an error was thrown or not:

try {
    // Code that may throw an error
} catch (error) {
    // Handle the error
} finally {
    // This code runs no matter what
    console.log('Cleanup code here.');
}