Use html5 to implement simple drag function-H5 Tutorial-php.cn

Use html5 to implement simple drag function

王林

Release： 2020-12-10 16:59:04

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Use html5 to implement simple drag function

The specific method is as follows:

1. Set the draggable attribute of the object element to true (draggable="true"). It should also be noted that the a element and img element must specify href;

2. Write event processing code related to drag and drop:

(Learning video sharing: html video tutorial)

Use html5 to implement simple drag function

3. Case implementation code:

(1) HTML code segment:

<div id="cun" οndrοp="drop(event)" οndragοver="allowDrop(event)"></div>
<br />
<img  src="img/html5.png" id="tuo" draggable="true" οndragstart="drag(event)"/ alt="Use html5 to implement simple drag function" >

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(2) CSS code segment:

#tuo{
	width: 540px;
	height: 320px;
	background: #e54d26;
}
#cun{
	width: 540px;
	height: 320px;
	border: 2px solid #d2d2d2;
	box-shadow: 1px 4px 8px #646464;
}
img{
	width: 500px;
	height: 280px;
}

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(3) JavaScript code segment:

function allowDrop(ev){
	//不执行默认处理（拒绝被拖放）
	ev.preventDefault();
};
function drag(ev){
	//使用setData(数据类型，携带的数据)
	//方法将要拖放的数据存入dataTransfer对象
	ev.dataTransfer.setData("Text",ev.target.id);
};
function drop(ev){
	//不执行默认处理（拒绝被拖放）
	ev.preventDefault();
	//使用getData()获取到数据，然后赋值给data
	var data = ev.dataTransfer.getData("Text");
	//使用appendChild方法把拖动的节点放到元素节点中成为其子节点
	ev.target.appendChild(document.getElementById(data));
};

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4. The effect achieved is as follows:

(1) Before dragging and dropping:

Use html5 to implement simple drag function

(2) After dragging and dropping

Use html5 to implement simple drag function

Related recommendations: html5 tutorial

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