promise

Features

• Support iterables in Promise.race and Promise.all

• Force update to the latest version of asap (the old asap had a really nasty race condition)

• Avoid attaching unnecessary internal/private methods to the prototype
• FIX: make Promise.all correctly handle misbehaving promises
• small possible performance improvements when passing already fulfilled/rejected promises to Promise.all

• rewrite core.js to be much faster (exposes some internals via randomly named _ prefixed variables)
• Update to asap 2.0.1 internally
• add Promise#finally
• add support for "tail recursion" providing no reference to the root promise is maintained. This may change callback ordering, but that ordering was previously unspecified.
• remove support for domains from default build
• add a special build for domains
• add a special build for environments that implement a sufficiently efficient setImmediate that including asap is unnecessary.

• Add support for functions that return promises in denodeify

• FIX component support (which was broken in 6.0.0)

• Calling .then on a custom promise that inherits from Promise will return an instance of the custom promise type. This simplifies writing custom promise implementations on top of Promise
• Remove an internal call to Object.create (making it easier to polyfil older browsers)
• Pass through this context in .nodeify
• Split extensions into separate files
• REMOVE Promise.from
• REMOVE Promise.cast
• REMOVE support for multiple arguments to Promise.all (i.e. you must do Promise.all([a, b]) instead of Promise.all(a, b))
• REMOVE node specific extensions from browser polyfill (i.e. nodeify and denodeify). These remain in the CommonJS version.

• check callback is a function in nodeify
• deprecate from, cast and multi-arg all
• fix syntax error in ES3 (note that es5-shim is still required)

• use asap internally for better performance
• optimize Promise.from
• make new mandatory when creating promises BREAKING
• support passing argumentCount to denodeify
• add resolve, reject, cast, race and prototype.catch (for ES6 compatibility)

• add promise.done
• add promise.nodeify
• add Promise.denodeify
• add Promise.from

• include LICENSE in npm package
• performance optimisations

• rewrite based on work by @nathan7

• Re-implement based on https://github.com/promises-aplus/constructor-spec/issues/18

• Use setImmediate internally for speed increase
• Automatically catch errors in the factory function and convert them into rejections.