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Vue3 + TypeScript 实现 PC 端鼠标横向拖动滚动

backend 2025/5/1 8:56:29

功能说明

拖动功能：

鼠标按下时记录初始位置和滚动位置
拖动过程中计算移动距离并更新滚动位置
松开鼠标后根据速度实现惯性滚动

滚动控制：

支持鼠标滚轮横向滚动（通过 wheel 事件）
自动边界检测防止滚动超出内容范围

实现代码

<template><div ref="scrollContainer" class="horizontal-scroll-container"@mousedown="startDrag"@mousemove="onDrag"@mouseup="stopDrag"@mouseleave="stopDrag"><div class="scroll-content"><div v-for="(item, index) in items" :key="index" class="item">{{ item }}</div></div></div>
</template><script setup lang="ts">
import { ref, onMounted, onUnmounted } from 'vue'// 定义滚动容器引用
const scrollContainer = ref<HTMLElement | null>(null)// 定义滚动内容数据
const items = ref<string[]>(Array.from({ length: 20 }, (_, i) => `Item ${i + 1}`))// 拖动状态变量
let isDragging = false
let startX = 0
let scrollLeft = 0
let lastTime = 0
let velocity = 0// 开始拖动
const startDrag = (e: MouseEvent): void => {if (!scrollContainer.value) returnisDragging = truestartX = e.pageX - scrollContainer.value.getBoundingClientRect().leftscrollLeft = scrollContainer.value.scrollLeftlastTime = performance.now()scrollContainer.value.style.cursor = 'grabbing'
}// 拖动中
const onDrag = (e: MouseEvent): void => {if (!isDragging || !scrollContainer.value) returnconst x = e.pageX - scrollContainer.value.getBoundingClientRect().leftconst walk = (x - startX) * 1.5 // 调整滚动速度系数scrollContainer.value.scrollLeft = scrollLeft - walk// 计算速度（用于惯性滚动）const now = performance.now()velocity = (x - startX) / (now - lastTime)lastTime = now
}// 停止拖动
const stopDrag = (): void => {if (!isDragging || !scrollContainer.value) returnisDragging = falseif (Math.abs(velocity) > 0.1) {requestAnimationFrame(inertiaScroll)}scrollContainer.value.style.cursor = 'grab'
}// 惯性滚动
const inertiaScroll = (): void => {if (!scrollContainer.value || Math.abs(velocity) < 0.01) returnscrollContainer.value.scrollLeft += velocity * 10velocity *= 0.95 // 摩擦系数requestAnimationFrame(inertiaScroll)
}// 边界检测
const checkBounds = (): void => {if (!scrollContainer.value) returnconst containerWidth = scrollContainer.value.clientWidthconst contentWidth = scrollContainer.value.scrollWidthif (scrollContainer.value.scrollLeft < 0) {scrollContainer.value.scrollLeft = 0} else if (scrollContainer.value.scrollLeft > contentWidth - containerWidth) {scrollContainer.value.scrollLeft = contentWidth - containerWidth}
}// 鼠标滚轮横向滚动
const handleWheel = (e: WheelEvent): void => {if (!scrollContainer.value) returne.preventDefault()scrollContainer.value.scrollLeft += e.deltaYcheckBounds()
}// 生命周期钩子
onMounted(() => {if (scrollContainer.value) {scrollContainer.value.addEventListener('wheel', handleWheel, { passive: false })}
})onUnmounted(() => {if (scrollContainer.value) {scrollContainer.value.removeEventListener('wheel', handleWheel)}
})
</script><style scoped>
.horizontal-scroll-container {width: 100%;overflow-x: auto;white-space: nowrap;cursor: grab;height: 220px; /* 确保容器有固定高度 */border: 1px solid #eee;border-radius: 8px;padding: 10px;box-sizing: border-box;
}.horizontal-scroll-container:active {cursor: grabbing;
}.scroll-content {display: inline-block;
}.item {display: inline-block;width: 200px;height: 200px;margin-right: 10px;background: #f0f0f0;display: flex;align-items: center;justify-content: center;font-size: 20px;border: 1px solid #ddd;box-sizing: border-box;border-radius: 4px;transition: transform 0.2s ease, box-shadow 0.2s ease;
}.item:hover {transform: scale(1.02);box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
</style>