Conditionally render download button in react - reactjs

Question

I have a download button from which the user can download the assets. but I want only authenticated users can download. If the user is not authenticated and click on the download button I want to show them a modal with a login button on it. I have a modal component. I am using React.
Please help me.
Getting currently authenticated user from the firebase.
const {currentUser} = useAuth();
This is my code for the download button.
<a className="bg-secondary text-white font-bold py-3
px-5 rounded text-2xl focus:outline-none mt-3 block w-48" href="YOUR_URL">
<i className="animate-bounce fas fa-arrow-down mr-2"></i>
Download
</a>
Modal Code:
import React from "react";
import { useState } from "react";
export default function Modal() {
const [showModal, setShowModal] = useState(true);
console.log('modal');
return (
<>
{showModal ? (
<>
<div
className="justify-center items-center flex overflow-x-hidden overflow-y-auto fixed inset-0 z-50 outline-none focus:outline-none"
onClick={() => setShowModal(false)}
>
<div className="relative w-auto my-6 mx-auto max-w-3xl">
{/*content*/}
<div className="border-0 rounded-lg shadow-lg relative flex flex-col w-full bg-white outline-none focus:outline-none">
{/*header*/}
<div className="flex items-start justify-between p-5 border-b border-solid border-gray-300 rounded-t">
<h3 className="text-3xl font-semibold">
Modal Title
</h3>
<button
className="p-1 ml-auto bg-transparent border-0 text-black opacity-5 float-right text-3xl leading-none font-semibold outline-none focus:outline-none"
onClick={() => setShowModal(false)}
>
<span className="bg-transparent text-black opacity-5 h-6 w-6 text-2xl block outline-none focus:outline-none">
×
</span>
</button>
</div>
{/*body*/}
<div className="relative p-6 flex-auto">
<p className="my-4 text-gray-600 text-lg leading-relaxed">
I always felt like I could do anything. That’s the main
thing people are controlled by! Thoughts- their perception
of themselves! They're slowed down by their perception of
themselves. If you're taught you can’t do anything, you
won’t do anything. I was taught I could do everything.
</p>
</div>
{/*footer*/}
<div className="flex items-center justify-end p-6 border-t border-solid border-gray-300 rounded-b">
<button
className="text-red-500 background-transparent font-bold uppercase px-6 py-2 text-sm outline-none focus:outline-none mr-1 mb-1"
type="button"
style={{ transition: "all .15s ease" }}
onClick={() => setShowModal(false)}
>
Close
</button>
<button
className="bg-green-500 text-white active:bg-green-600 font-bold uppercase text-sm px-6 py-3 rounded shadow hover:shadow-lg outline-none focus:outline-none mr-1 mb-1"
type="button"
style={{ transition: "all .15s ease" }}
onClick={() => setShowModal(false)}
>
Save Changes
</button>
</div>
</div>
</div>
</div>
<div className="opacity-25 fixed inset-0 z-40 bg-black"></div>
</>
) : null}
</>
);
}

Answer 1

You could use button instead of a and use onClick to check if currentUser exists when you click button.
This is final code:
function x {
const {currentUser} = useAuth();
const downloadAssets = () => {
if(currentUser){
window.open("url assets here", '_blank', 'noopener,noreferrer')
}else{
// Open modal here
alert("User not authenticated");
}
}
return {
<>
...
<button onClick={downloadAssets}><i className="animate-bounce fas fa-arrow-down mr-2"></I>Download</button>
...
</>
}