目录
分享一下前端常见功能"可拖动弹框"的实现方式,分别用原生JS和Vue实现。
一、使用原生JS实现
1.HTML结构
首先创建一个弹框的HTML结构,例如:
html
<div id="draggableDialog">
<div class="dialog-header">可拖动弹框标题</div>
<div class="dialog-content">弹框内容</div>
</div>
2.CSS样式
设置弹框样式,使其具有一定的外观和布局:
css
#draggableDialog {
position: absolute;
width: 300px;
height: 200px;
background-color: #fff;
border: 1px solid #ccc;
padding: 10px;
}
.dialog-header {
cursor: move;
background-color: #f0f0f0;
padding: 5px;
}
3.使用JavaScript实现弹框的可拖动功能
javascript
const dialog = document.getElementById('draggableDialog');
const dialogHeader = dialog.querySelector('.dialog-header');
let isDragging = false;
let offsetX, offsetY;
dialogHeader.addEventListener('mousedown', (e) => {
isDragging = true;
offsetX = e.clientX - dialog.offsetLeft;
offsetY = e.clientY - dialog.offsetTop;
});
document.addEventListener('mousemove', (e) => {
if (isDragging) {
dialog.style.left = e.clientX - offsetX + 'px';
dialog.style.top = e.clientY - offsetY + 'px';
}
});
document.addEventListener('mouseup', () => {
isDragging = false;
});
在上述代码中,首先获取弹框元素和弹框头部元素。当在弹框头部按下鼠标时,记录鼠标位置与弹框位置的偏移量,并设置拖动状态为true
。当鼠标移动时,如果处于拖动状态,根据鼠标位置和偏移量更新弹框的位置。当鼠标松开时,设置拖动状态为false
。
二、使用Vue实现
javascript
<template>
<div id="draggableDialog" ref="dialog">
<div class="dialog-header" @mousedown="startDrag($event)">可拖动弹框标题</div>
<div class="dialog-content">弹框内容</div>
</div>
</template>
<script>
export default {
data() {
return {
isDragging: false,
offsetX: 0,
offsetY: 0
};
},
methods: {
startDrag(event) {
this.isDragging = true;
this.offsetX = event.clientX - this.$refs.dialog.offsetLeft;
this.offsetY = event.clientY - this.$refs.dialog.offsetTop;
document.addEventListener('mousemove', this.drag);
document.addEventListener('mouseup', this.stopDrag);
},
drag(event) {
if (this.isDragging) {
this.$refs.dialog.style.left = event.clientX - this.offsetX + 'px';
this.$refs.dialog.style.top = event.clientY - this.offsetY + 'px';
}
},
stopDrag() {
this.isDragging = false;
document.removeEventListener('mousemove', this.drag);
document.removeEventListener('mouseup', this.stopDrag);
}
}
};
</script>
<style>
#draggableDialog {
position: absolute;
width: 300px;
height: 200px;
background-color: #fff;
border: 1px solid #ccc;
padding: 10px;
}
.dialog-header {
cursor: move;
background-color: #f0f0f0;
padding: 5px;
}
</style>
在 Vue 示例中,通过在模板中定义弹框结构,并在方法中实现拖动的逻辑。使用ref
属性获取弹框元素,在事件处理函数中更新弹框位置,并在鼠标松开时停止拖动