useIntervalAsync

The useIntervalAsync custom Hook allows you to asynchronously set up an interval in a React component. It leverages the setIntervalAsync and clearIntervalAsync functions from the set-interval-async library. This hook is particularly useful when you need to perform an asynchronous task at regular intervals. Below is a structured documentation of the code with examples and usage elanations.

Import Statements

import { useEffect, useLayoutEffect, useRef } from "react";
import { setIntervalAsync, clearIntervalAsync } from "set-interval-async";

*Libraries Used

• React Hooks:

  • useEffect
  • useLayoutEffect
  • useRef

• set-interval-async:

  • setIntervalAsync
  • clearIntervalAsync

Hook Definition: useIntervalAsync

eort const useIntervalAsync = (
  callback: () => void,
  delay: number | null
) => {
  const savedCallback = useRef(callback);

  useLayoutEffect(() => {
    savedCallback.current = callback;
  }, [callback]);

  useEffect(() => {
    if (!delay && delay !== 0) {
      return undefined;
    }

    let isRunning = true;
    const interval = setIntervalAsync(() => {
      if (!isRunning) {
        if (interval) clearIntervalAsync(interval);
      }
      return savedCallback.current();
    }, delay);

    return () => {
      isRunning = false;
    };
  }, [delay]);
};

eort default useIntervalAsync;

Parameters

Parameter	Type	Description
callback	() => void	Function to be executed at each interval.
delay	number | null	Time delay (in milliseconds) for intervals. Use null to pause.

Usage

Setting Up an Interval

To set up an asynchronous interval, use the useIntervalAsync hook in your component:

import useIntervalAsync from "./useIntervalAsync";

const MyComponent = () => {
  const myCallbackFunction = () => {
    console.log("Interval running asynchronously! ");
  };

  useIntervalAsync(myCallbackFunction, 1000); // Executes every second

  return <div>Check your console for interval logs! </div>;
};

Pausing the Interval

To pause the interval, simply set the delay to null:

useIntervalAsync(myCallbackFunction, null); // Interval paused

Key Features

• Asynchronous Intervals: Leverages setIntervalAsync for non-blocking intervals.
• React Integration: Uses useEffect and useLayoutEffect for optimal performance within React's lifecycle.
• Callback Updating: The hook ensures that the latest version of the callback is used.

Considerations

• Zero Delay: A delay of 0 is valid and will execute the callback immediately on each render.
• Cleaning Up: The interval is cleaned up automatically when the component unmounts or the delay changes.

Tip: Always ensure your callback function is resilient and can handle being invoked as eected by the interval logic.

By using useIntervalAsync, you can efficiently manage asynchronous operations at intervals in your React applications, enhancing both performance and user eerience.