Created
June 21, 2017 13:37
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Wrap a Javascript event in a Promise with a time out.
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function waitForEventWithTimeout(emitter, eventName, timeout) { | |
return new Promise((resolve, reject) => { | |
let timer; | |
function listener(data) { | |
clearTimeout(timer); | |
emitter.removeEventListener(eventName, listener); | |
resolve(data); | |
} | |
emitter.addEventListener(eventName, listener); | |
timer = setTimeout(() => { | |
emitter.removeEventListener(eventName, listener); | |
reject(new Error("timeout waiting for " + eventName)); | |
}, timeout); | |
}); | |
} | |
// Example usage | |
//const promise = waitForEventWithTimeout(session, 'message', 2000); | |
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