24 lines
771 B
TypeScript
24 lines
771 B
TypeScript
// Copyright 2017-2020 @polkadot/react-api authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { CallState } from '../types';
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import { Subscription } from 'rxjs';
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import { interval } from 'rxjs/observable/interval';
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const interval$ = interval(500);
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export default function intervalObservable<T, Props, State extends CallState> (that: React.Component<Props, State>): Subscription {
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return interval$.subscribe((): void => {
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const elapsed = Date.now() - ((that.state.callUpdatedAt as number) || 0);
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const callUpdated = elapsed <= 1500;
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if (callUpdated !== that.state.callUpdated) {
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that.setState({
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callUpdated
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});
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}
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});
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}
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