如何使用HTML5拖放与KnockoutJS结合使用？ [英] How to use HTML5 drag and drop in combination with KnockoutJS?

问题描述

我似乎无法绑定到html5拖放事件。

I can't seem to bind to html5 drag and drop events.

这是一个模板的例子：

<script id="tabsTemplate" type="text/html">
    <div class="dropzone" for="tab"
        data-bind="event:{dragover: function(event){event.preventDefault();},
                          dragenter: function(event){event.target.addClass('dragover'); event.preventDefault();},
                          dragleave: function(event){event.target.removeClass('dragover'); event.preventDefault();}}
                          drop: function(event){console.log('blahblah!')}"></div>
    <h1 class="tab" draggable="true"
      data-bind="attr: {selected: $data.name === $item.selected()},
                 click: function(){$item.selected($data.name)},
                 event:{ dragstart: function(event){console.log('blah!!')},
                         dragend: function(event){document.getElementsByClassName('dragover')[0].removeClass('dragover')}}">
        ${name}

        <img src="icons/close-black.png" class="close button" role="button"
            data-bind="click: function(e){$item.close($data)}">
    </h1>
</script>

我应该按预期工作，只要我使其成为正常的内联那些。但是，其他绑定不起作用！

What I have should work as expected... and it does as long as I make them normal inline ones. However, then the other bindings don't work!

我收到此错误消息：

未捕获的SyntaxError：意外的令牌'||'jquery-tmpl.js：10

Uncaught SyntaxError: Unexpected token '||' jquery-tmpl.js:10

这里发生了什么？有没有什么我在做错？

What's going on here? Is there something I'm doing wrong?

推荐答案

好的，我已经做了。似乎我错过了文档，它说在敲除，默认情况下，它使所有事件阻止默认/返回false。所以我要做的只是让我的dragstart处理程序返回true，现在它可以工作。 Phew !!

OK, I have worked it out. It seems I missed in the documentation where it said that in knockout, by default it makes all events prevent default / return false. So all I had to do was make my dragstart handler return true, and now it works. Phew!!

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