mirror of https://github.com/sussy-code/smov.git
42 lines
1007 B
TypeScript
42 lines
1007 B
TypeScript
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import { useEffect, useRef, useState } from "react";
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export function useIsOnline() {
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const [online, setOnline] = useState<boolean | null>(true);
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const ref = useRef<boolean>(true);
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useEffect(() => {
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let counter = 0;
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let abort: null | AbortController = null;
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const interval = setInterval(() => {
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// if online try once every 10 iterations intead of every iteration
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counter += 1;
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if (ref.current) {
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if (counter < 10) return;
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}
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counter = 0;
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if (abort) abort.abort();
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abort = new AbortController();
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const signal = abort.signal;
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fetch("/ping.txt", { signal })
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.then(() => {
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setOnline(true);
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ref.current = true;
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})
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.catch((err) => {
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if (err.name === "AbortError") return;
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setOnline(false);
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ref.current = false;
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});
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}, 5000);
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return () => {
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clearInterval(interval);
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if (abort) abort.abort();
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};
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}, []);
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return online;
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}
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