My current project involves creating a transparent navigation bar that changes its background and text color as the user scrolls. Utilizing TailwindCSS for styling in my React application, I have successfully implemented the functionality.
// src/components/Navbar.js
import React, { useState } from 'react';
const Navbar = () => {
const [navbarBackground, setNavbarBackground] = useState('transparent');
const [navbarTextColor, setNavbarTextColor] = useState('slate-200');
const handleScroll = () => {
const scrolled = window.scrollY;
if (scrolled > 20) {
setNavbarBackground('slate-200');
setNavbarTextColor('slate-800');
} else {
setNavbarBackground('transparent');
setNavbarTextColor('slate-200');
}
};
window.addEventListener('scroll', handleScroll);
return (
<nav
className={`flex justify-between p-4 fixed top-0 w-full z-50 transition bg-${navbarBackground}`}
>
<div className={`font-cursive text-${navbarTextColor}`}>Luca Cangelosi</div>
<div className="flex space-x-10">
<a className={`text-${navbarTextColor} font-semibold transition cursor-pointer`}>About</a>
<a className={`text-${navbarTextColor} font-semibold transition cursor-pointer`}>Store</a>
<a className={`text-${navbarTextColor} font-semibold transition cursor-pointer`}>Contact</a>
<div>
<i className={`text-${navbarTextColor} fas fa-shopping-cart transition cursor-pointer`}></i>
</div>
</div>
</nav>
);
};
export default Navbar;
The code functions by checking the vertical position of the scroll. If the position is at the top of the page (Y-position 0), the navbar has a class of bg-transparent with link text color set to text-slate-200. Otherwise, the navbar background becomes bg-slate-200, while link colors change to text-slate-800.
However, upon initial running of npm start, the code does not behave as expected. The navigation bar remains transparent even after scrolling down, and link colors are uncertain. Interestingly, fixing one link color explicitly seems to resolve this issue temporarily until reverting back.
Why does this erratic behavior occur initially? What measures can be taken to ensure proper functioning from the start, especially in production?
Any insights or solutions would be greatly appreciated. Thank you!