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For the nesting shown above, suppose the .then() associated with "promise B" returns a nextValue of "promise X". GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

kellyjromer pro asked a year ago .

でも、 jQuery 2.x と jQuery 1.x は同じ API を持っているものの、いわゆる oldIE （Internet Explorer 6、7、8） といわれるレガシーな IE がサポートされない。 というか、jQuery 2.x はレガシーをサポートしない分、軽量化され高速。 ~Author Unknown.

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The Deferred object has another important method named Promise(). Watch→ 5/28/13.

There are different ways to check the version of Internet Explorer being used. The link simply tells you that you need "ES6 Promise" for IE11 but does not show how to do it!

本記事は、マイクロソフト本社の IE チームのブログ から記事を抜粋し、翻訳したものです。 【元記事】Asynchronous Programming in JavaScript with Promise (2011/9/12 5:04 AM ) 非同期パターンは、Web プログラミングの機能を高めることから幅広く使用されるようになり、その重要性はますます高まっています。 This method returns an object with almost the same interface than the Deferred, but it only have the methods to attach callbacks and does not have the methods to resolve and reject. When using script tags the global variables Promise and P (alias for Promise) become available. Other possibilities This article is just an introduction to the deferred object. Nutanix Frame.

It can only be used inside an async function.
Syntax-1: For Internet Explorer 10 or older I have to work on IE11 so this is kind of challenging due to limitations. Update July 15th, 2015: jQuery 3.0 will fix this problem: jQuery.Deferred is now Promises/A+ compatible and errors thrown can now be catched in a catch() method.

Bluebird runs on a wide variety of browsers including older versions.