AliFarhan
December 30, 2023
247 views
1 vote
2 Answers

I have created a header menu on which I want to show the border-bottom of the red color & text-color of black on the active menu. To achieve this I am using the useLocation() function from the react-router-dom but it is not showing up.

import { useLocation, useNavigate } from "react-router-dom";


const Header = () => {
    const location = useLocation();
    const navigate = useNavigate();

    const checkPath = (path) => {
        console.log(location.pathname, path);
        if (path === location.pathname) return true;
        else return false;
    }

    return (
        <div className="bg-white border-b shadow-sm sticky top-0 z-50">
            <header className="flex justify-between items-center px-3 max-w-6xl mx-auto">
                <div>
                    <img src="https://static.rdc.moveaws.com/images/logos/rdc-logo-default.svg" alt="" className="h-5 cursor-pointer" onClick={() => navigate('/')} />
                </div>
                <div>
                    <ul className="flex gap-5">
                        <li className={`py-6 text-sm border-b-[3px] text-gray-500 font-semibold border-b-transparent ${checkPath("/") && "text-black border-b-red-500"}  cursor-pointer`} onClick={() => navigate('/')}>Home</li>
                        <li className={`py-6 text-sm border-b-[3px] text-gray-500 font-semibold border-b-transparent ${checkPath("/offers") && "text-black border-b-red-500"}  cursor-pointer`} onClick={() => navigate('/offers')}>Offers</li>
                        <li className={`py-6 text-sm border-b-[3px] text-gray-500 font-semibold border-b-transparent ${checkPath("/sign-in") && "text-black border-b-red-500"} cursor-pointer`} onClick={() => navigate('/sign-in')}>Sign In</li>
                    </ul>

                </div>

            </header>
        </div>
    )
}

export default Header

This is the GitHub link of the repository: https://github.com/olifarhaan/griha-milan

How to replicate the issue

Clone the repository on your local machine.
Run the following script npm install

I tried everything but the I think the tailwind css is not overriding the previous classes I used console.log after && then it is showing in the console.

Answers

- Wongjn
- December 23, 2023 at 5:08 pm
- 0 votes
0
The problem is that you already have classes that apply color and border-bottom-color. When checkPath() returns true, the element then has two classes that apply color and border-bottom-color each. Then you are at the mercy of the CSS order to which CSS rule applies, and alas, it seems the "static" classes appear later in the CSS and thus no visual changes are visible.

To resolve your predicament, consider altering the classes such that only one class is applied for a property (with the same variant) at any one time:
```
<li className={`py-6 text-sm border-b-[3px] font-semibold ${checkPath("/") ? "text-black border-b-red-500" : "text-gray-500 border-b-transparent"} cursor-pointer`} onClick={() => navigate('/')}>Home</li>
<li className={`py-6 text-sm border-b-[3px] font-semibold ${checkPath("/offers") ? "text-black border-b-red-500" : "text-gray-500 border-b-transparent"} cursor-pointer`} onClick={() => navigate('/offers')}>Offers</li>
<li className={`py-6 text-sm border-b-[3px] font-semibold ${checkPath("/sign-in") ? "text-black border-b-red-500" : "text-gray-500 border-b-transparent"} cursor-pointer`} onClick={() => navigate('/sign-in')}>Sign In</li>
```
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- PieterPienaar
- December 24, 2023 at 1:07 am
- 0 votes
0
So you actually have 2 issues. Like @Wongjn said, you are creating a CSS conflict, and it is better to address it with a ternary operator (like he did), i.e.,
```
condition ? "className if true" : "default classNames"
```
But what you also did wrong is combining classes. So with Tailwind, you need to specify each characteristic of a element separately. So once you show that the border is on the bottom with border-b-[3px] then any other characteristic applied to the border will be added to the visible part of the border only (which is the bottom in this case). So your code should be:
```
className="border-b-[3px] border-red-500"
```
Making your final classNames:
```
<li className={`py-6 text-sm font-semibold border-b-[3px] ${ _____ ? "text-black border-red-500" : "text-gray-500 border-transparent"}  cursor-pointer`} ...
```
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