找不到变数：在Safari上的Promise [英] Can't find variable: Promise on Safari

问题描述

我有一个我正在工作的网站，完美的运行在Chrome的桌面上（Windows 8.1和OS X小牛）

当我在iOS上运行7或Safari 7.0.2我在控制台上收到一条错误，指出在加载路由时出错：checkIfLoggedIn'

在消息中指定的成员不是路由，它是一种返回承诺的方法。当我调试ember代码来弄清楚出了什么问题，我发现它是拒绝承诺的原因是'无法找到变量：Promise'

我不能在这里发布我的网站的实际代码，所以我开始创建一个小提琴重现错误，我能够想出这一点：

http://jsfiddle.net/NQKvy/851/

这完全适用于桌面电脑（Windows 8.1和OS X Mavericks）的Chrome，但在iOS 7或Safari 7.0.2上，会向控制台引用以下错误：ReferenceError：无法找到变量：Promise'

任何人都有任何想法为什么这不工作？

要重述：

• 我已经在Chrome上测试了Windows 8.1和OS X小牛 - 它的工作原理


• 我已经在Chrome上进行了iOS测试， / li>
  
• 我已经在Safari上测试了iOS和OS X小牛，它不工作


• 我还没有在Android上测试（目前我无法访问任何设备）

这使我相信它是一个Safari错误（如果我记得正确）Chrome for iOS使用Safari控件来渲染页面而不是Chromium

这是我使用的代码生成错误：

  App.ready = function（）{
 var asdf = new Promise（function（resolve）{
 var i = 1; 
 i ++; 
 resolve.call（this，i）; 
}）然后（function（result）{
 alert（'I：'+ result）; 
}）; 
}; 
  

解决方案

事实证明，在Safari上，您必须使用完全合格的创建承诺时的名称，否则将无法正常工作：

  App.ready = function（）{
 var asdf = new Ember.RSVP.Promise（function（resolve）{
 var i = 1; 
 i ++; 
 resolve.call（this，i）; 
}）then function（result）{
 alert（'I：'+ result）; 
}）; 
}; 
  

注意新的Ember.RSVP.Promise而不是新的Promise。这似乎为我解决了。

I have a site I'm working on that runs perfectly on Chrome for the desktop (Windows 8.1 & OS X Mavericks)

When I run it on iOS 7 or Safari 7.0.2 I get an error to the console that states 'Error while loading route: checkIfLoggedIn'

the member it specifies at the message is not a route, it is a method that returns a promise. When I debug through the ember code to figure out what is going wrong I found that it is rejecting the promise with the reason of 'Can't find variable: Promise'

I can't post the actual code from my site here, so I set out to create a fiddle that reproduces the error and I was able to come up with this:

http://jsfiddle.net/NQKvy/851/

This runs perfectly on Chrome for the desktop (Windows 8.1 & OS X Mavericks), but on iOS 7 or Safari 7.0.2 throws the following error to the console 'ReferenceError: Can't find variable: Promise'

Anyone have any ideas why this isn't working?

To recap:

• I have tested on Chrome for Windows 8.1 and OS X Mavericks - It works
• I have tested on Chrome for iOS and it does not work
• I have tested on Safari for iOS and OS X Mavericks and it does not work
• I have not tested on Android at all (I don't have access to any devices at this moment)

This leads me to believe that it is a Safari error as (if I recall correctly) Chrome for iOS uses a Safari control to render the page rather than Chromium

This is the code I'm using to generate the error:

App.ready = function() {
    var asdf = new Promise(function (resolve) {   
        var i = 1;
        i++;
        resolve.call(this,i);
    }).then(function (result) {
        alert('I: ' + result);
    });
};

解决方案

Turns out that on Safari you must use the fully qualified name when creating a promise, otherwise it will not work:

App.ready = function() {
    var asdf = new Ember.RSVP.Promise(function (resolve) {   
        var i = 1;
        i++;
        resolve.call(this,i);
    }).then(function (result) {
        alert('I: ' + result);
    });
};

Note the 'new Ember.RSVP.Promise' instead of the 'new Promise'. This appears to fix it for me.

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