mirror of
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23 lines
746 B
TypeScript
23 lines
746 B
TypeScript
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import { _ } from '@joplin/lib/locale';
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import { Platform } from 'react-native';
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const lockToSingleInstance = async () => {
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if (Platform.OS !== 'web') return;
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const channel = new BroadcastChannel('single-instance-lock');
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channel.postMessage('app-opened');
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await new Promise<void>((resolve, reject) => {
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channel.onmessage = (event) => {
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if (event.data === 'app-opened') {
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channel.postMessage('already-running');
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} else if (event.data === 'already-running') {
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alert(_('At present, Joplin Web can only be open in one tab at a time. Please close the other instance of Joplin.'));
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reject(new Error(_('Joplin is already running.')));
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}
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};
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setTimeout(() => resolve(), 250);
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});
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};
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export default lockToSingleInstance;
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