![bluebird app not woking bluebird app not woking](https://i2.wp.com/rockinmama.net/wp-content/uploads/2012/11/bluebird-atm.jpg)
that's totally ok as long as you don't use require("bluebird"). If your library needs to do something obtrusive like adding or modifying methods on the Promise prototype, uses long stack traces or uses a custom unhandled rejection handler then. config () īuilding a library that depends on bluebird? You should know about the "scoped prototype" feature. The actual subscription API depends on the environment. This feature has to be explicitly enabled by calling nfig with monitoring: true. "promiseCancelled" - Fired when a promise is cancelled."promiseResolved" - Fired when a promise adopts another's state."promiseRejected" - Fired when a promise is rejected."promiseFulfilled" - Fired when a promise is fulfilled."promiseChained" - Fired when a promise is created through chaining (e.g.then)."promiseCreated" - Fired when a promise is created through the constructor.The following lifecycle events are available: This feature enables subscription to promise lifecycle events via standard global events mechanisms in browsers and Node.js.
#Bluebird app not woking full
Note - in order to get full stack traces with warnings in Node 6.x+ you need to enable to -trace-warnings flag which will give you a full stack trace of where the warning is coming from.
#Bluebird app not woking how to
See installation on how to enable warnings in your environment. See Warning Explanations for the possible warnings that bluebird covers.
![bluebird app not woking bluebird app not woking](https://www.roamthegnome.com/wp-content/uploads/2020/09/image-bluebird-taxi-bali-app-memo-1.jpg)
Bluebird works around the limitations by providing warnings where the standards disallow throwing errors when incorrect usage is detected. Promises can have a steep learning curve and it doesn't help that promise standards go out of their way to make it even harder. Perhaps the greatest thing about promises is that it unifies all error handling into one mechanism where errors propagate automatically and have to be explicitly ignored. See installation on how to enable long stack traces in your environment. All these are non-trivial problems that haunt straight-forward long stack trace implementations. Bluebird's long stack traces additionally eliminate cycles, don't leak memory, are not limited to a certain amount of asynchronous boundaries and are fast enough for most applications to be used in production. Unhandled rejection ReferenceError: a is not definedĪt processImmediate (timers.js:321:17)Īt Object.Module._extensions.js (module.js:464:10)Īt Function.Module._load (module.js:296:12)Īt (module.js:487:10)Īnd there is more. Normally stack traces don't go beyond asynchronous boundaries so their utility is greatly reduced in asynchronous code: See global rejection events to learn more about the hooks.
#Bluebird app not woking code
Often it is known in certain code paths that a promise is guaranteed to be fulfilled at that point - it would then be extremely inconvenient to use. Synchronous inspection allows you to retrieve the fulfillment value of an already fulfilled promise or the rejection reason of an already rejected promise synchronously. This article is partially or completely unfinished.