YUI Library Examples: Drag & Drop: Using a Proxy Element

Drag and Drop Proxies

The YUI Drag & Drop Utility lets you make HTML elements draggable.

For this example, we will enable drag and drop for the three <div> elements. However, instead of dragging the elements around, a proxy element is created and moved instead. Many implmentations can benefit from the use of the proxy element because it avoids positioning complications that can occur when changing the css styles of the source element. Proxy drags also perform better than dragging the element directly.

Create the demo elements:

Now we create the instances of YAHOO.util.DDProxy, passing the element ids or references for our demo elements.

// The third instance has a dedicated custom proxy
            dd3 = new YAHOO.util.DDProxy("dd-demo-3", "default", {

// Define a custom proxy element.  It will be
                    // created if not already on the page.
                    dragElId: "dd-demo-3-proxy",

// When a drag starts, the proxy is normally
                    // resized.  Turn this off so we can keep a
                    // fixed sized proxy.
                    resizeFrame: false
                });

});
    })();
</script>

YUI Logger Output:

Note: Logging and debugging is currently turned off for this example.

Reload with logging
and debugging enabled.

Drag & Drop Examples:

More Drag & Drop Resources:

All YUI 2.x users should review the YUI 2.8.2 security bulletin, which discusses a vulnerability present in YUI 2.4.0-2.8.1.