HTML5 drag-and-drop effect implementation code and html5 drag-and-drop code
Drag and Drop
Drag and Drop is a common feature, that is, to drag an object to another position after it is captured.
In HTML5, drag and drop is part of the standard, and any element can be dragged and dropped.
Internet Explorer 9 +, Firefox, Opera, Chrome, and Safari support dragging.
Note:Safari 5.1.2 does not support drag.
Instance:
<! DOCTYPE html>First, in order to make the elements can be draggedDraggable attributesSet to true:
Then, specify what will happen when the element is dragged.
In the preceding example,Ondragstart attributeCall a function, drag (event), which specifies the data to be dragged.
DataTransfer. setData () methodSet the data type and value of the dragged data:function drag(ev){ ev.dataTransfer.setData("Text",ev.target.id);}In this example, the data type is "Text", and the value is the id ("drag1") of the element that can be dragged ").
Ondragover eventSpecifies where to place the dragged data.
By default, data/elements cannot be placed in other elements. To allow placement, We must block the default Processing Method for elements.
This must be done by callingOndragover eventOfEvent. preventDefault () method: Event. preventDefault ()A drop event occurs when data is dragged.
In the preceding example, the ondrop attribute calls a function,Drop (event ):function drop(ev){ ev.preventDefault(); var data=ev.dataTransfer.getData("Text"); ev.target.appendChild(document.getElementById(data));}Code explanation:
CallPreventDefault ()To avoid the browser's default processing of data (the default action of the drop event is to open in the form of a link)
PassDataTransfer. getData ("Text") MethodObtain the dragged data. This method returns any data set to the same type in the setData () method.
Dragged data is the id of the dragged element ("drag1 ")
Append the dragged element to the placed element (target element ).Drag back and forth:
To drag back and forth in two places, just make some modifications to the above Code.
Change the code in the body:<body> <div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)"> </div> <div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div> </body>Then add # div2 to the style:
<style type="text/css"> #div1,#div2{width:360px;height:220px;padding:20px;border:1px solid black;} </style>In this way, you can drag and drop back and forth.
The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.
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