15b1069bcc
This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously. closes #1282
21 lines
547 B
TypeScript
21 lines
547 B
TypeScript
import * as React from "react";
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/**
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* Hook to return page visibility state.
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*
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* @returns boolean if the page is visible
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*/
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export default function usePageVisibility(): boolean {
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const [visible, setVisible] = React.useState(true);
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React.useEffect(() => {
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const handleVisibilityChange = () => setVisible(!document.hidden);
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document.addEventListener("visibilitychange", handleVisibilityChange);
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return () => {
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document.removeEventListener("visibilitychange", handleVisibilityChange);
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};
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}, []);
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return visible;
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}
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