React Manual Error Handling

By default, Error Boundaries do not catch errors thrown during event handlers or in asynchronous code. This hook is a basic one that allows you to redirect these errors through the use of state so that they are thrown by the component itself and caught by the boundary.

The hook is exported as default, so you can import in one of the following ways:

// ES6
import useManualErrorHandling from '@ptolemy2002/react-manual-error-handling';
// CommonJS
const useManualErrorHandling = require('@ptolemy2002/react-manual-error-handling');

Type Reference

type TryFunction<T> = (fn: () => Promise<T> | T) => Promise<T | void>;
type ThrowFunction = (e: unknown) => void;
type UseManualErrorHandlingResult<T> =
  HookResult<{_try: TryFunction<T>, _throw: ThrowFunction}, TryFunction<T> | ThrowFunction>
  & {_try: TryFunction<T>, _throw: ThrowFunction}
  & [TryFunction<T>, ThrowFunction]
;

DO NOT attempt to access array properties in UseManualErrorHandlingResult directly, as it doesn't actually have those properties. The array is used so that destructuring works correctly.

Hooks

The following hooks are available in the library:

useManualErrorHandling<T = any>(): UseManualErrorHandlingResult

Description

When using the hook, you get two functions: _try and _throw. _throw simply needs to be called with an error as the only argument. _try is an async function itself that is called with a callback function as the only argument. It will attempt running the callback and use _throw if an error is thrown. The callback can be either a normal function or async. Here's an example of usage:

function Main() {
    const { _try } = useManualErrorHandling();
    const handleClick = () => _try(() => errorDelay(1000));

    return (
        <button onClick={handleClick}>Click to throw an error after 1 second</button>
    );
}

The errorDelay function is a simple function that throws an error after a delay. This example can be seen in action within the library's repository.

T represents the type that the callback function must return.

Parameters

None

Returns

• UseManualErrorHandlingResult<T>: An object containing the _try and _throw functions. The object can be accessed as an object or as an array, courtesy of the HookResult class.

Peer Dependencies

• react^18.3.1
• react-dom^18.3.1
• @ptolemy2002/react-hook-result^2.1.1
• @ptolemy2002/ts-utils^3.0.0

Commands

The following commands exist in the project:

• npm run build - Builds the library
• npm run dev - Starts the development server
• npm run lint - Lints the project
• npm run uninstall - Uninstalls all dependencies for the library and clears the cache
• npm run reinstall - Uninstalls, clears the cache, and then reinstalls all dependencies for the library
• npm run release - Publishes the library to npm without changing the version
• npm run release-patch - Publishes the library to npm with a patch version bump
• npm run release-minor - Publishes the library to npm with a minor version bump
• npm run release-major - Publishes the library to npm with a major version bump