useDropdown

The useDropdown hook is a custom hook that creates a dropdown behavior in React applications. It allows you to detect clicks outside of the dropdown element and trigger a callback function when this occurs. This is particularly useful for implementing dropdown menus that should close when the user clicks anywhere outside of the menu.

Parameters

typescript

function useDropdown(
	ref: RefObject<HTMLElement>,
	onClickOutside: () => void
): void;

ref: required - The reference ref to the HTML element representing the dropdown. This is typically created using the useRef hook.
onClickOutside: required - The callback function to be called when the user clicks outside the dropdown.

Usage

Import the useDropdown hook from hookings and use it in your React components:

jsx

import { useRef } from "react";
import { useDropdown } from "hookings";
 
const dropdownRef = useRef(null);
 
useDropdown(dropdownRef, () => {
	console.log("Dropdown clicked outside!");
});
 
<div ref={dropdownRef} />;

In the first example, the useKeyDown will be called callback function once every 300 milliseconds. This can be useful for handling functions that should not be called too frequently, ensuring a smoother user experience.

Example

Closing a Dropdown When Clicked Outside

jsx

import { useState, useRef } from "react";
import { useDropdown } from "hookings";
 
const DropdownMenu = () => {
	const [isDropdownOpen, setIsDropdownOpen] = useState(false);
	const dropdownRef = useRef(null);
 
	// Close the dropdown when clicked outside of it
	useDropdown(dropdownRef, () => {
		setIsDropdownOpen(false);
	});
 
	const handleDropdownToggle = () => {
		setIsDropdownOpen((prevState) => !prevState);
	};
 
	return (
		<div>
			<button onClick={handleDropdownToggle}>Toggle Dropdown</button>
			{isDropdownOpen && (
				<div ref={dropdownRef} style={{ border: "1px solid black" }}>
					Dropdown Content
				</div>
			)}
		</div>
	);
};

In this example, the DropdownMenu component has a button that toggles the dropdown's visibility. The useDropdown hook is used to close the dropdown whenever the user clicks outside of it. This ensures that the dropdown menu behaves as expected, allowing users to easily interact with it.

With HTML Element Reference

html

<!DOCTYPE html>
<html>
	<head>
		<title>Dropdown Example</title>
	</head>
	<body>
		<button id="toggleButton">Toggle Dropdown</button>
		<div id="dropdown" style="border: 1px solid black;">
			Dropdown Content
		</div>
 
		<script type="module">
			import { useDropdown } from "hookings";
 
			const dropdownElement = document.getElementById("dropdown");
			const toggleButton = document.getElementById("toggleButton");
 
			// Close the dropdown when clicked outside of it
			useDropdown(dropdownElement, () => {
				console.log("Dropdown clicked outside!");
			});
 
			toggleButton.addEventListener("click", () => {
				dropdownElement.classList.toggle("hidden");
			});
		</script>
	</body>
</html>

In this example, the useDropdown hook is used in a vanilla JavaScript environment with an HTML element reference (dropdownElement). The dropdown will now log a message to the console when the user clicks outside of it.

Conclusion

The useDropdown hook is a valuable tool for creating dropdown behavior in your React applications. By utilizing this hook, you can easily implement dropdown menus that respond to user interactions and provide a smooth and intuitive user experience. Happy coding! 🚀

useInterval