barkey/packages/frontend/src/scripts/use-document-visibility.ts

19 lines
460 B
TypeScript

import { onMounted, onUnmounted, ref, Ref } from 'vue';
export function useDocumentVisibility(): Ref<DocumentVisibilityState> {
const visibility = ref(document.visibilityState);
const onChange = (): void => {
visibility.value = document.visibilityState;
};
onMounted(() => {
document.addEventListener('visibilitychange', onChange);
});
onUnmounted(() => {
document.removeEventListener('visibilitychange', onChange);
});
return visibility;
}