//为了方便借助vue和jquery
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>拖拽排序</title>
<style>
ul,
li {
list-style: none;
padding: 0;
margin: 0;
}
ul {
margin: 0 auto;
width: 200px;
}
.item {
font-size: 15px;
border: 1px solid #eee;
border-radius: 4px;
padding: 8px 10px;
margin: 15px 0;
}
.item.before {
margin-top: 45px;
transition: margin-top 0.15s ease-in;
}
.item.after {
margin-bottom: 45px;
transition: margin-bottom 0.15s ease-in;
}
</style>
</head>
<body>
<div id="app">
<ul class="items">
<li class="item" v-for="i in 5" draggable="true" @dragstart="dragstart($event)">{{i}}</li>
</ul>
</div>
<script src="./libs/jquery.min.js"></script>
<script src="./libs/vue.js"></script>
<script>
new Vue({
el: '#app',
data: {
},
methods: {
dragstart(e) {
let dragTarget = $(e.currentTarget);
let overTarget = null;
let allItems = dragTarget.parent().children('.item');
let x = null, y = null;
let overTargetSize = {
width: null,
height: null,
}
for (let i = 0; i < allItems.length; i++) {
const el = allItems[i];
el.ondragenter = function (evt) {
overTarget = $(evt.target)
return true;
}
el.ondragover = function (evt) {
x = evt.offsetX;
y = evt.offsetY;
// overTargetSize.width = evt.target.offsetWidth;
// overTargetSize.height = evt.target.offsetHeight;
$(allItems).removeClass('after').removeClass('before')
if (y > 19) {
$(evt.target).addClass('after');
} else if (y <= 19) {
$(evt.target).addClass('before');
}
}
el.ondragend = function (evt) {
if (y > 19) {
$(overTarget).after(dragTarget)
} else if (y <= 19) {
$(overTarget).before(dragTarget)
}
$(allItems).removeClass('after').removeClass('before');
x = null, y = null;
return false;
}
}
},
}
})
</script>
</body>
</html>