无法将图片设置为jsPlumb端点

我在项目中使用jsPlumb库，并且具有一个可以更改端点映像(如果已连接)的函数.我在页面加载时调用它，并且一切正常，但是当我在连接事件上调用它时，什么也没有发生.这是我的代码:

I'm using jsPlumb library in my project and I have a function that changes endpoint images if they are connected. I call it when the page loads and everything works fine, but when I call it on connection event, nothing happens. Here is my code:

function changeEndpointImage(){
            var elem = $('.tableBody');   //These are my connectable elements
            for(var i=0;i<elem.length;i++)
            {
                 var eps=jsPlumb.getEndpoints($(elem[i]));  //Getting endpoints for each of the connectable elements
                 for(var j=0;j<eps.length;j++)
                 {
                      if(eps[j].connections.length!=0)  //Checking if any of them have connections
                           eps[j].setImage("images/styled_radiobutton.png");  //Setting another image
                 }
            }
        }
jsPlumb.bind("connection", function(connection) {
     changeEndpointImage();

     //I have also tried this method commented below, but nothing.
     //connection.sourceEndpoint.setImage("images/styled_radiobutton.png");
     //connection.targetEndpoint.setImage("images/styled_radiobutton.png");

});

如果连接已断开，我还试图将端点图像恢复为第一眼外观，但是在这种情况下，只有源端点被更改，目标保持不变:

I'm also trying to change endpoint images back to the first look if the connection is detached, but in this case, only the source endpoint gets changed, target remains the same:

jsPlumb.bind("connectionDetached", function(connection) {
    connection.targetEndpoint.setImage("images/rsz_styled_radiobutton.png");
    connection.sourceEndpoint.setImage("images/rsz_styled_radiobutton.png");
});

我缺少什么或如何解决此问题?

What am I missing or how can I fix this problem?

这是jsfiddle:

Here is jsfiddle:

https://jsfiddle.net/vaxobasilidze/cg3hkde7/

将一些项目拖到右侧的div，按添加新链接"，然后尝试附加分离的连接.您将看到端点不变.

Drag few items to the right div, press "Add new link" and try to attach detach connections. You will see that endpoints don't change.