Multiple .then calls will only fire the last .then callback about ajax HOT 10 OPEN

I vote for the simple route of assuming the native Promise global exists. It's available on every modern platform and most polyfills support creating a global if necessary.

Using the babel plugin would force users into es6-promise even if they wanted to use bluebird or some other promise library.

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Hi @banderso-n! This is the expected behaviour (for now).
The chainable .then implementation to work as Promises doesn't was implemented yet.

Feel free to send a pull request =)

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@fdaciuk what are your thoughts on just using native promises?
http://caniuse.com/#feat=promises

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I think so =)

But I think it will be better if something like babel promise plugin is used instead.

What do you think about it?

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Make sense, but that's not enough =)
And if user haven't any other promise library included on project? Ajax must work even in this case.
The main idea from this library is that it abstracts XMLHttpRequest, using Promises - or something like xD

I thought in create a mini library, based on Promise/A+ spec to solve this.

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If they don't have a promise polyfill included and they have to support legacy environments without native Promises built in then they should use a polyfill. There shouldn't be a need to create another promise library, there are already quite a few popular choices:

https://github.com/stefanpenner/es6-promise
https://github.com/petkaantonov/bluebird
https://github.com/tildeio/rsvp.js
https://github.com/then/promise
https://github.com/stackp/promisejs
...and the list goes on

If ajax were to pick a promise library (or create its own), then users of a different promise library would need to have 2 promise libraries loaded. By assuming a Promise global (or possibly passing in an option to ajax()), it gives more control to users.

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Opened #38 as a discussion point.

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the non-standard promise almost ruined my project...

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@kenberkeley what did you end up doing/using instead?
I chased a bug caused by this for about an hour...

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@fabiocbinbutter wrap with the native promise...

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