新建ElementDrag.vue文件

<template>
    <div class="drag-outer" 
    ref="dragWrap"
    :
    @mouseenter="isHover = true" 
    @mouseleave="isHover = isMousedown = false"
    @mousemove="dragMousemove">
        <div class="drag-inner"
        ref="dragElement" 
        :
        @mousedown="dragMousedown"
        @mouseup.stop="isMousedown = false">
            <slot></slot>
        </div>
    </div>
</template>

<script>
export default {
    name: 'ElementDrag',
    props: {
        outerOptions: {
            type: Object,
            default () {
                return {
                    background: 'rgba(0,0,0,0.9)'
                }
            }
        },
        innerOptions: {
            type: Object,
            default () {
                return {
                    background: 'rgba(0,0,0,0.1)',
                }
            }
        },
        scaleZoom: {
            type: Object,
            default () {
                return {
                    max: 5, 
                    min: 0.2
                }
            }
        }
    },
    data() {
        return {
            isMousedown: false,
            isHover: false,
            moveStart: {},
            translate: {x: 0, y: 0},
            scale: 1
        }
    },
    methods: {
        handleScroll(e) {
            if(this.isHover) {
                let speed = e.wheelDelta/120
                if(e.wheelDelta > 0 && this.scale < this.scaleZoom.max) {
                    this.scale+=0.04*speed
                    this.$refs.dragElement.style.transform = `scale(${this.scale}) translate(${this.translate.x}px, ${this.translate.y}px)`
                }else if(e.wheelDelta < 0 && this.scale > this.scaleZoom.min){
                    this.scale+=0.04*speed
                    this.$refs.dragElement.style.transform = `scale(${this.scale}) translate(${this.translate.x}px, ${this.translate.y}px)`
                }
            }
        },
        dragMousedown() {
            this.moveStart.x = event.clientX
            this.moveStart.y = event.clientY
            this.isMousedown = true 
        },
        dragMousemove() {
            if(this.isMousedown) {
                this.translate.x += (event.clientX - this.moveStart.x) / this.scale
                this.translate.y += (event.clientY - this.moveStart.y) / this.scale
                this.$refs.dragElement.style.transform = `scale(${this.scale}) translate(${this.translate.x}px, ${this.translate.y}px)`
                this.moveStart.x = event.clientX
                this.moveStart.y = event.clientY
            }
        }
    },
    mounted() {
        window.addEventListener('mousewheel',this.handleScroll,false) 
    }
}
</script>

<style lang="scss" scoped>
.drag-outer {
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    .drag-inner {
        transform-origin: center center;
        display: flex;
        justify-content: center;
        align-items: center;
        cursor: move;
        user-select: none;
        >* {
            -webkit-user-drag: none;
            user-drag: none;
        }
    }
}
</style>

使用

<template>
  <div class="home">
    <ElementDrag>
        <img src="https://img0.baidu.com/it/u=937276518,3474029246&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=750">
    </ElementDrag>
  </div>
</template>

<script>
import ElementDrag from '@/components/ElementDrag'
export default {
  name: 'Home',
  components: {
    ElementDrag
  }
}
</script>

<style scoped>
.home {
  width: 100vw;
  height: 100vh;
} 
</style>

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