Typescript Try...catch Statement

Typescript try...catch statement

Created By: chatGPT

TypeScript allows you to handle errors gracefully using the try...catch statement. This construct lets you test a block of code for errors and handle them without crashing your application. By leveraging both try and catch, you can control the flow of execution based on whether an error occurs. Here’s how you can use it in your TypeScript code:

try {
    // code that may throw an error
    let result = riskyOperation();
    console.log('Result:', result);
} catch (error) {
    // code to handle the error
    console.error('An error occurred:', error);
}

In the example above, the riskyOperation function is called within the try block. If an error occurs during the execution of that function, the control is transferred to the catch block. This ensures that the application keeps running instead of crashing due to the unhandled exception.

function riskyOperation() {
    // This function may throw an error
    throw new Error('Something went wrong');
}

You can also define the type of the error within your catch block to handle different types of exceptions appropriately. This can be useful when dealing with known error types.

try {
    // some operation
} catch (error: any) {
    if (error instanceof Error) {
        console.error('Caught an error:', error.message);
    } else {
        console.error('An unknown error occurred');
    }
}

Finally, you can optionally include a finally block which will execute regardless of whether an error was thrown or not. This is often used for cleanup actions such as releasing resources.

try {
    // code that may throw
} catch (error) {
    // handle the error
} finally {
    // this code runs regardless of the outcome
    console.log('Cleanup actions');
}

Using try...catch effectively can improve the robustness of your TypeScript applications, making them more resilient to unexpected errors. Always ensure to log or handle errors appropriately to maintain clarity in debugging.

function safeExecute() {
    try {
        // Execute some critical logic
    } catch (error) {
        console.error('Execution failed:', error);
    }
}