h5可拖动悬浮按钮_手机端H5悬浮按钮怎么实现的呢?
时间: 2023-06-17 16:05:42 浏览: 159
实现一个可拖动的悬浮按钮,可以使用以下步骤:
1. 在 HTML 中添加一个悬浮按钮的元素,比如一个 `<div>` 标签。
```html
<div class="floating-button"></div>
```
2. 使用 CSS 设置该元素的样式,比如设置它的位置、大小、背景色、圆角等。
```css
.floating-button {
position: fixed;
bottom: 20px;
right: 20px;
width: 50px;
height: 50px;
background-color: #007bff;
border-radius: 50%;
z-index: 9999;
}
```
3. 使用 JavaScript 实现拖动功能。可以监听该元素的 `mousedown`、`mousemove`、`mouseup` 事件,通过计算鼠标的位置和元素的位置差,实现元素的拖动。
```javascript
var floatingButton = document.querySelector('.floating-button');
var isDragging = false;
var lastX, lastY;
floatingButton.addEventListener('mousedown', function(e) {
isDragging = true;
lastX = e.clientX;
lastY = e.clientY;
});
floatingButton.addEventListener('mousemove', function(e) {
if (isDragging) {
var deltaX = e.clientX - lastX;
var deltaY = e.clientY - lastY;
var rect = floatingButton.getBoundingClientRect();
floatingButton.style.left = rect.left + deltaX + 'px';
floatingButton.style.top = rect.top + deltaY + 'px';
lastX = e.clientX;
lastY = e.clientY;
}
});
floatingButton.addEventListener('mouseup', function() {
isDragging = false;
});
```
这样就实现了一个可拖动的悬浮按钮。需要注意的是,对于移动端,需要考虑触摸事件而非鼠标事件。同时,需要使用 CSS 设置 `touch-action: none;`,防止浏览器默认的滚动行为干扰拖动操作。
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