async-handler-ts

async-handler-ts provides a utility function for handling asynchronous operations in TypeScript. It simplifies the process of error handling and result extraction, allowing you to write cleaner and more concise code.

Installation

You can install async-handler-ts via npm or yarn:

npm i async-handler-ts

# or

yarn add async-handler-ts

Usage

To use async-handler-ts, import the asyncHandler function from the package:

import { asyncHandler } from "async-handler-ts"

The asyncHandler function takes a single argument, which can either be an asynchronous function you want to handle or a direct promise. It returns a promise that resolves to a tuple (an array of just two elements) containing the result and error (if any).

Handling Asynchronous Functions

Here's an example of how to use asyncHandler with an asynchronous function:

async function fetchData(): Promise<string> {
  // Simulating an asynchronous operation
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve("Data fetched successfully")
    }, 1000)
  })
}

async function main() {
  const [result, error] = await asyncHandler(fetchData)
  if (error) {
    console.error("An error occurred:", error)
  } else {
    console.log("Result:", result)
  }
}

main()

Handling Direct Promises

You can also use asyncHandler directly with promises:

const dataPromise = Promise.resolve("Done!")

async function main() {
  const [result, error] = await asyncHandler(dataPromise)
  if (error) {
    console.error("An error occurred:", error)
  } else {
    console.log("Result:", result)
  }
}

main()

By wrapping your function or promise with asyncHandler, you can conveniently handle any errors that occur. If the operation succeeds, the result variable will hold the resolved value, and error will be undefined. Conversely, if an error is thrown or the promise is rejected, result will be undefined, and error will contain the thrown error.

Contribution

Contributions to async-handler-ts are welcome! If you encounter any issues, have suggestions, or would like to add new features, please open an issue or submit a pull request on the GitHub repository.

License

This project is licensed under the MIT license.