以编程方式创建拖动事件时，dataTransfer 为空
我正在尝试创建一个 dragEvent 并在 Chrome 上使用此代码以编程方式触发它:
I am trying to create a dragEvent and fire it programmatically using this code on Chrome:
var ev = document.createEvent("MouseEvents");
ev.initEvent("dragstart");
然后以这种方式触发它:
and then fire it this way:
element.dispatchEvent(ev);
元素具有可拖动属性.
The element has draggable attribute.
事件已成功发送.但是，在触发事件时 - dataTransfer 对象为空.即使我尝试手动将其设置为工作 dataTransfer 对象 - 它仍然保持为空.
The event was dispatched successfully. However on the event being fired - the dataTransfer object is null. Even when I try to set it manually to a working dataTransfer object - it still stays null.
有什么想法吗?
谢谢
Any ideas?
Thanks
推荐答案
很遗憾，目前似乎没有这样的方法可以通过编程方式创建 DataTransfer 对象.HTML5 拖放界面的描述说:
Unfortunately, it seems that there is no such a way to create a DataTransfer object programmatically at the moment. The description of HTML5 drag and drop interface says:
虽然为了与其他事件接口保持一致，DragEvent 接口有一个构造函数，但并不是特别有用.特别是，无法从脚本创建有用的 DataTransfer 对象，因为 DataTransfer 对象具有在拖放过程中由浏览器协调的处理和安全模型
Although, for consistency with other event interfaces, the DragEvent interface has a constructor, it is not particularly useful. In particular, there's no way to create a useful DataTransfer object from script, as DataTransfer objects have a processing and security model that is coordinated by the browser during drag-and-drops
请在此处查看更多详细信息:http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#the-dragevent-and-datatransfer-interfaces
Please check more details here: http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#the-dragevent-and-datatransfer-interfaces
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