This time I will show you how to create a drag-and-drop effect in H5. What are the precautions for H5 to create a drag-and-drop effect? The following is a practical case, let’s take a look.
Drag related attributesThe draggable attribute is the<ul>
<li id="item1" draggable="true">列表1</li>
<li id="item2" draggable="true">列表2</li>
<li id="item3" draggable="true">列表3</li>
<li id="item4" draggable="true">列表4</li>
<li id="item5" draggable="true">列表5</li>
<li id="item6" draggable="true">列表6</li>
</ul>Drag-related eventsondragstart: This event Triggered when the user starts dragging an element or selecting text ondrag: Triggered when the element is being dragged ondragend: Triggered when the user completes dragging and dropping an element ondragleave: Triggered when the object being dragged by the mouse leaves the scope of its container ondragover: Triggered when an object is dragged This event is triggered when the moving object is dragged within the scope of another object container. This event occurs on the target element. ondrop: During a drag process, this event is triggered when the mouse is released. This event acts on the target element. dataTransfer object related methodssetData(format,data): Add a custom data format getData(format): Get a custom data format clearData([format]): Clear the custom data format and dataEvent.preventDefault()This method is the default behavior to prevent events. PreventDefault() must be executed in ondragover, otherwise the ondrop event will not be triggered<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.main{
width: 800px;
/*border: 1px solid #ccc;*/
height: 400px;
margin:0 auto;
}
.left{
float: left;
width: 25%;
background-color: #666;
height: 370px;
text-align: center;
color: black;
padding-top:30px ;
font-size: 110px;
}
.right{
float: right;
width: 69%;
}
.right ul,.right li{
margin: 0;
padding: 0;
}
.right li{
list-style: none;
border: 2px dashed #666;
background-color: #ddd;
height: 60px;
margin-top: 3px;
text-indent: 30px;
line-height: 60px;
}
.right li:hover{
background-color: #ccc;
}
#message{
width: 800px;
text-align: center;
border: 1px solid black;
margin: 20px auto;
font-size:28px;
}
</style>
<script type="text/javascript">
window.onload = function(){
var aLi = document.getElementsByTagName('li');
var oLeft = document.getElementsByClassName('left')[0];
var oMessage = document.getElementById('message');
for(var i=0;i<aLi.length;i++){
aLi[i].index = i+1;
aLi[i].ondragstart = function(ev){
//事件对象ev
var evev = ev || event;
ev.dataTransfer.setData("Text",this.id);
}
}
oLeft.ondrop = function(ev){
var evev = ev || event;
var data = ev.dataTransfer.getData("Text");
var num = document.getElementById(data).index;
document.getElementById(data).remove();
oMessage.innerHTML = "列表"+num+"被放进了垃圾箱";
this.style.color = "black";
}
oLeft.ondragover = function(ev){
var evev = ev || event;
ev.preventDefault();
}
oLeft.ondragenter = function(){
this.style.color = "#fff";
}
}
</script>
</head>
<body>
<div class="main">
<div class="left">垃圾箱</div>
<div class="right">
<ul>
<li id="item1" draggable="true">列表1</li>
<li id="item2" draggable="true">列表2</li>
<li id="item3" draggable="true">列表3</li>
<li id="item4" draggable="true">列表4</li>
<li id="item5" draggable="true">列表5</li>
<li id="item6" draggable="true">列表6</li>
</ul>
</div>
<div style="clear: both;"></div>
</div>
<div id="message">拖到垃圾箱删除列表</div>
</body>
</html>Believe it After reading these cases, you have mastered the methods. For more exciting information, please pay attention to other related articles on the PHP Chinese website! Related reading:
How to count the number of table sums in bootstrap
How to use JS to switch between hiding and showing icons at the same time
How to implement vue.js todolist
The above is the detailed content of How to create drag effect in H5. For more information, please follow other related articles on the PHP Chinese website!
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