What Could This Be About Tslint Error Promises Must Be Handled Appropriately

If you're a software developer working with TypeScript, you've likely encountered the TSLint error "Promises must be handled appropriately." This error may seem intimidating at first, but fear not! In this article, we'll break down what this error means and how you can effectively handle promises in your code to resolve it.

### Understanding the TSLint Error:
When TypeScript detects that promises are not being handled correctly in your code, it throws the error "Promises must be handled appropriately." This error is a friendly reminder to ensure that your promises are being handled properly to prevent unexpected behavior and potential bugs in your application.

### Common Causes of the Error:
- **Missing Error Handling:** One common cause of this error is when promises are not properly chained with `catch` to handle any potential errors that may occur during their execution.
- **Forgetting to Return Promises:** Another reason for this error is forgetting to return promises from asynchronous functions, leading to unhandled promise rejections.

### Resolving the Error:
To resolve the TSLint error "Promises must be handled appropriately," follow these steps:

1. **Add Error Handling:** Make sure to include a `catch` block after your promise chain to handle any errors that may occur during the promise’s execution. This will prevent unhandled promise rejections in your code.

2. **Return Promises:** Always remember to return promises from asynchronous functions to ensure they are correctly executed and awaited.

### Example:

Typescript

function fetchData(): Promise {
    return new Promise((resolve, reject) =&gt; {
        // Simulate fetching data
        const data = 'Hello, world!';
        
        // Resolve the promise
        resolve(data);
    });
}

// Call the fetchData function
fetchData()
    .then((result) =&gt; {
        console.log(result);
    })
    .catch((error) =&gt; {
        console.error(`An error occurred: ${error}`);
    });

In this example, the `fetchData` function returns a promise that resolves with the data "Hello, world!". We then handle the result of the promise using `then` and add a `catch` block to handle any potential errors.

### Conclusion:
By understanding the TSLint error "Promises must be handled appropriately" and following best practices for handling promises in TypeScript, you can write more robust and reliable code. Remember to always add error handling and return promises from asynchronous functions to ensure your code performs as expected. Keep coding and happy troubleshooting!

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