30 lines
748 B
TypeScript
30 lines
748 B
TypeScript
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// Run a function with initial interval, then run it forever with the interval that the
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// callback returns.
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// Returns a callback to clear it.
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export function customSetInterval(
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asyncCallback: () => Promise<number>,
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initialInterval: number
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): () => void {
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let timeoutId: number;
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let currentInterval: number = initialInterval;
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const executeCallback = async () => {
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currentInterval = await asyncCallback();
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if (currentInterval === null || currentInterval === undefined) {
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throw "asyncCallback returned null or undefined";
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}
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scheduleNext();
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};
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let scheduleNext = () => {
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timeoutId = setTimeout(executeCallback, currentInterval);
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};
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scheduleNext();
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return () => {
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clearTimeout(timeoutId);
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};
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}
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