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SWR. Gave a error . In one case but in other don't . Very similar code

Jansen

I need your help. To figure out. What is happening ? I have two codes very similar. In this case, the code gives me an error: "Uncaught Error: Invalid hook call. Hooks can only be called inside of the body of a function component."

import React from "react";
import useSWR from "swr";
const fetcher=(...args)=>fetch(...args).then((resp)=>resp.json());

const useSwrTest=(GameViewBackendGameid)=>( useSWR(
    GameViewBackendGameid,
    fetcher,
    {
        suspense:true,
    }
))

function GetGameDataBackend(gameid){
    const GameViewBackendGameid='/api/v2/gameview/'+gameid
    const {data,error}=useSwrTest(GameViewBackendGameid);
    console.log(data)
    return <></>

}

export default GetGameDataBackend;

But in this case don't :


import React from "react";
import useSWR from "swr";
const fetcher=(...args)=>fetch(...args).then((resp)=>resp.json());
const useSwrTest=()=>( useSWR(
    "https://dog.ceo/api/breeds/image/random",
    fetcher,
    {
        suspense:true,
    }
))
function SwrV2(){
    const {data,error}=useSwrTest();
    if (error) {
        return <h1> There was an error!</h1>
    }

    return (
        <div>
        <img width={500} src={data.message} alt={"Text"}/>
        </div>
    );
}

export default SwrV2;

Why? In both cases are I am using swr inside on a function?