自定义拖拽功能，上下拖拽改变盒子高度

核心在于监听鼠标的move来改变div的高度，抽成了组件

<template><div ref="container" class="drag"><z-tooltip v-if="isShowIcon" effect="dark" content="格式化" placement="top-start"><div @click="handleClick"><c-icon icon-class="TextFormatwenbengeshi10" class-name="code-icon"></c-icon></div></z-tooltip><div class="bottom" :style="{ height: bottomHeight + 'px' }"><slot name="content"></slot></div><div ref="top" v-draggable class="top"></div></div>
</template><script>
export default {name: 'Drag',directives: {draggable: {inserted(el) {el.style.cursor = 'ns-resize'}}},props: {minHeight: {type: Number,default: 85},maxHeight: {type: Number,default: 600},height: {type: Number,default: 85},isShowIcon: {type: Boolean,default: false}},data() {return {bottomHeight: 85 // 初始化底部div的高度}},watch: {height: {handler(val) {this.bottomHeight = valthis.instance?.layout()},immediate: true,deep: true}},mounted() {this.dragControllerDiv()},methods: {dragControllerDiv() {const containerDiv = this.$refs.containerconst topDiv = this.$refs.toplet startMouseYlet startContainerHeightconst mouseMoveHandler = e => {e.preventDefault()// 计算拖动距离const deltaY = e.clientY - startMouseY// 计算新的容器高度const newContainerHeight = startContainerHeight + deltaY// 高度限制const clampedHeight = Math.max(this.minHeight, Math.min(this.maxHeight, newContainerHeight))// 计算底部div的高度const newBottomHeight = clampedHeight - topDiv.offsetHeightthis.$emit('move', newBottomHeight)// 更新底部div的高度this.bottomHeight = newBottomHeight}const mouseUpHandler = () => {document.removeEventListener('mousemove', mouseMoveHandler)document.removeEventListener('mouseup', mouseUpHandler)}topDiv.addEventListener('mousedown', e => {e.preventDefault()startMouseY = e.clientYstartContainerHeight = containerDiv.offsetHeight + 10document.addEventListener('mousemove', mouseMoveHandler)document.addEventListener('mouseup', mouseUpHandler)})},handleClick() {console.log('121')this.$emit('up')}}
}
</script><style>
/* 拖拽相关样式 */
.drag {position: relative;width: 100%;
}.top {position: absolute;bottom: 0;height: 2px;cursor: ns-resize;background-color: rgb(187 187 187);z-index: 100;width: calc(100% - 10px);left: 11px;&:hover {background-color: #3693ff;height: 3px;}
}.bottom {height: auto;background-color: #fff;z-index: 100;width: 100%;overflow: hidden;
}
.code-icon {float: right;cursor: pointer;
}
</style>