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--- layout: api id: timeout title: .timeout --- [← Back To API Reference](/docs/api-reference.html) <div class="api-code-section"><markdown> ##.timeout ```js .timeout( int ms, [String message="operation timed out"] ) -> Promise ``` ```js .timeout( int ms, [Error error] ) -> Promise ``` Returns a promise that will be fulfilled with this promise's fulfillment value or rejection reason. However, if this promise is not fulfilled or rejected within `ms` milliseconds, the returned promise is rejected with a [`TimeoutError`](.) or the `error` as the reason. When using the first signature, you may specify a custom error message with the `message` parameter. ```js var Promise = require("bluebird"); var fs = Promise.promisifyAll(require('fs')); fs.readFileAsync("huge-file.txt").timeout(100).then(function(fileContents) { }).catch(Promise.TimeoutError, function(e) { console.log("could not read file within 100ms"); }); ``` </markdown></div> <div id="disqus_thread"></div> <script type="text/javascript"> var disqus_title = ".timeout"; var disqus_shortname = "bluebirdjs"; var disqus_identifier = "disqus-id-timeout"; (function() { var dsq = document.createElement("script"); dsq.type = "text/javascript"; dsq.async = true; dsq.src = "//" + disqus_shortname + ".disqus.com/embed.js"; (document.getElementsByTagName("head")[0] || document.getElementsByTagName("body")[0]).appendChild(dsq); })(); </script> <noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript" rel="nofollow">comments powered by Disqus.</a></noscript>
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