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VisualizaçõesHow to display a message inside an empty div when a component doesn't render in it?
I have a div inside which I'm rendering dynamic card components(SearchRes):
<div className="search-res">
{games.filter(game => (game.background_image !== null)&&(game.ratings_count>38)).map(game=>
<SearchRes
key={game.name}
title={game.name}
rating={game.metacritic===null?<MdGamepad/>:game.metacritic}
genre={game.genres.map(genre=>genre.name+" ")}
imglnk={(game.background_image===null)?"":game.background_image}
gameid={game.id}
slug={game.slug}
plat={game.parent_platforms}
/>
)}
</div>
When the cards don't render (when they don't pass the filter conditions), I get a blank space. I want to display something like no results found when such thing happens, how can I implement this?
Currently I'm using CSS to implement it:
.search-res:empty::before {
content: "No data";}
but clearly this is not viable as the message is visible when the search is not even initiated:
3 Respostas
Responde à pergunta0
If I understand your question, you want to conditionally render a "No Data" fallback only after you've fetched data and there is nothing to render.
Add a loading state and conditionally render a loading indicator.
Filter the
gamesand in the render check that there is an array length (i.e. something to map), and conditionally render the array or the fallback text if there is a current search term.
Code
const [searchLoaded, setSearchLoaded] = React.useState(false);
// in search handler
// toggle searchLoaded false when initiating a search
// toggle searchLoaded true when search completes
const results = games.filter(
game => game.background_image !== null && game.ratings_count > 38
);
<div className="search-res">
{results.length
? results.map(game => (
<SearchRes
key={game.name}
title={game.name}
rating={game.metacritic === null ? <MdGamepad/> : game.metacritic}
genre={game.genres.map(({ name }) => name).join(" ")}
imglnk={game.background_image === null ? "" : game.background_image}
gameid={game.id}
slug={game.slug}
plat={game.parent_platforms}
/>
))
: searchLoaded && "No Data"
}
</div>
0
I would suggest to filter the array first, based on the conditions and then check if the array has length i.e. arr.length !== 0 and if that is the case, then map the results of the array to the card component. And if not then show the message that no data found. You would have to use if/else or ternary operator.
Thanks😊
0
if you are using a filter only for conditioning then there is no need for a filter instead you can use conditional rendering like this:
<div className="search-res">
{games.map(game=>
{(game.background_image !== null && game.ratings_count>38) ?
<SearchRes
key={game.name}
title={game.name}
rating={game.metacritic===null?<MdGamepad/>:game.metacritic}
genre={game.genres.map(genre=>genre.name+" ")}
imglnk={(game.background_image===null)?"":game.background_image}
gameid={game.id}
slug={game.slug}
plat={game.parent_platforms}
/> : "NO RESULTS FOUND"}
)}
</div>