I'm using matchMedia in React to collapse my SideBar when the page is resizing. But the problem is if I refresh the page, my sidebar is open not closed. So if I want to collapse my SideBar I need to resize the page again or use the close button.
const layout = document.getElementById('home-layout');
const query = window.matchMedia('(max-width: 765px)');
query.onchange = (evt) => {
if( query.matches ) {
changeMenuMinified(true);
layout.classList.add('extended-layout');
}
else {
changeMenuMinified(false);
layout.classList.remove('extended-layout');
}
};
query.onchange();
};
useEffect(() => {
window.addEventListener('resize', handleResize);
});
If I remove addEventListener it works, I can reload the page and my sidebar stays closed but if I try to open the sidebar with a button, the sidebar closes quickly
const handleResize = () => {
const layout = document.getElementById('home-layout');
const query = window.matchMedia('(max-width: 765px)');
query.onchange = (evt) => {
if( query.matches ) {
changeMenuMinified(true);
layout.classList.add('extended-layout');
}
else {
changeMenuMinified(false);
layout.classList.remove('extended-layout');
}
};
query.onchange();
};
useEffect(() => {
handleResize()
});
Some stuff to consider here:
useEffect dependency array to avoid your code being executed on each render.You can find a working example here -> https://codesandbox.io/s/stack-72619755-lpwh6m?file=/src/index.js:0-613
const query = window.matchMedia('(max-width: 765px)')
const App = () => {
const [minified, changeMenuMinified] = useState(query.matches)
useEffect(() => {
const resizeHandler = () => {
if (query.matches) {
changeMenuMinified(true)
} else {
changeMenuMinified(false)
}
}
query.addEventListener("change", resizeHandler);
return () => query.removeEventListener("change", resizeHandler);
})
return <p>{minified ? 'minified' : 'expanded'}</p>
}