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async function waitUntil(isWaitDone, untilMs, stepMs = 25) {
const startMs = Date.now();
return new Promise((resolve, reject) => {
const areWeDoneYet = setInterval(async function() {
if (await isWaitDone()) {
clearInterval(areWeDoneYet);
resolve();
} else if (Date.now() > startMs + untilMs) {
clearInterval(areWeDoneYet);
reject(new Error("Timed out after " + untilMs + "ms"));
}
}, stepMs);
});
}
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