鼠标方上去随意拖动到其它位置

<template><div style="margin: 50px;"><div class="dade draggable-div"  @mousedown="startDrag($event)" @mouseup="stopDrag" @mousemove="drag($event)"style="width: 200px;height: 200px;border: 1px solid #e7e7e7;cursor: all-scroll;"></div></div>
</template><script>export default {data() {return {isDragging: false,startX: 0,startY: 0,currentX: 0,currentY: 0};},watch: {},//界面没出来前加载created() {this.list = menu_tree;},mounted() {},computed: {},methods: {//鼠标按下startDrag(event) {this.isDragging = true;this.startX = event.clientX;this.startY = event.clientY;this.currentX = parseInt(event.target.offsetLeft);this.currentY = parseInt(event.target.offsetTop);// event.target.style.cursor = 'grabbing';document.addEventListener('mousemove', this.drag);document.addEventListener('mouseup', this.stopDrag);},drag(event) {if (this.isDragging) {const diffX = event.clientX - this.startX;const diffY = event.clientY - this.startY;event.target.style.left = this.currentX + diffX + 'px';event.target.style.top = this.currentY + diffY + 'px';}},stopDrag() {this.isDragging = false;// event.target.style.cursor = 'grab';document.removeEventListener('mousemove', this.drag);document.removeEventListener('mouseup', this.stopDrag);}}
};
</script><style scoped>.dade{-webkit-box-shadow: 0 2px 0px 0 rgba(0,0,0,.1);box-shadow: 0 2px 12px 0 rgba(0,0,0,.1);}.draggable-div {position: absolute;}
</style>