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2025-01-22 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
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Editor to share with you how to set css elements to drag and drop, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!
Drag what-ondragstart and setData ()
Then, specify what happens when the element is dragged.
In the above example, the ondragstart property calls a function, drag (event), which specifies the data being dragged.
The dataTransfer.setData () method sets the data type and value of the data being dragged:
Function drag (ev)
{
Ev.dataTransfer.setData ("Text", ev.target.id)
}
Text is a DOMString that represents the type of drag data to be added to the dragobject. The value is the id ("drag1") of the draggable element.
-where to put it?-ondragover.
The ondragover event specifies where to place the dragged data.
By default, data / elements cannot be placed in other elements. If we need to set allow placement, we must block the default handling of the element.
This is done by calling the event.preventDefault () method of the ondragover event:
Event.preventDefault ()
Make placement-ondrop
The drop event occurs when the dragged data is placed.
In the above example, the ondrop property calls a function, drop (event):
Function drop (ev)
{
Ev.preventDefault ()
Var data=ev.dataTransfer.getData ("Text")
Ev.target.appendChild (document.getElementById (data))
}
Code interpretation:
Call preventDefault () to avoid the browser's default handling of data (the default behavior of the drop event is to open as a link)
The data being dragged is obtained through the dataTransfer.getData ("Text") method. This method returns any data that is set to the same type in the setData () method.
The data being dragged is the id ("drag1") of the dragged element.
Append the dragged element to the placement element (target element)
The above is all the content of the article "how to set elements to drag and drop in css". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!
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