el-checkbox-group限制勾选数量

<!--* @Description: 视频监控 页面* @Author: mhf* @Date: 2023-08-15 13:26:33
-->
<template><div class="videoSurveillance"><el-row :gutter="24"><el-col :span="4"><div class="videoSurveillance-left"><div class="videoSurveillance-left-header">视频监控</div><div class="videoSurveillance-left-check"><el-checkbox-groupv-model="checkedArr"@change="handleCheckedChange"><el-checkboxv-for="(item, index) in sourceArr":label="item.name":key="index"><el-tooltipoverflowclass="item"effect="dark":content="item.name"placement="right"><div class="check-name">{{ item.name }}</div></el-tooltip></el-checkbox></el-checkbox-group></div></div></el-col><el-col :span="20"><div class="videoSurveillance-right"><div class="sourceBox"></div></div></el-col></el-row></div>
</template><script>
export default {name: "videoSurveillance",components: {},props: {},data() {return {sourceArr: [{name: "视频监控1",source: "",},{name: "视频监控2",source: "",},{name: "视频监控3",source: "",},{name: "视频监控4",source: "",},{name: "视频监控5",source: "",},{name: "视频监控6",source: "",},{name: "视频监控7",source: "",},{name: "视频监控8",source: "",},{name: "视频监控9",source: "",},{name: "视频监控10",source: "",},],checkedArr: [],maxChecked: 7,};},methods: {handleCheckedChange(e) {if (e.length > this.maxChecked) {this.$message.warning(`最多只能选择${this.maxChecked - 1}个视频监控`);this.checkedArr = e.slice(e.length - this.maxChecked);}if (e.length === this.maxChecked && this.checkedArr.length === this.maxChecked) {this.$nextTick(() => {this.checkedArr = e.filter(item => item !== this.checkedArr[0]);});}},},created() {},mounted() {},
};
</script><style lang="scss" scoped>
.videoSurveillance {background-color: #e9e9eb;width: 100%;&-left,&-right {height: calc(100vh - 132px - 2 * 20px) !important;background: #ffffff;border-radius: 4px;}&-left {box-shadow: 0 4px 10px 0 #dddddd;&-header {height: 30px;background: #1492ff;border-radius: 4px 4px 0 0;font-size: 14px;font-family: MicrosoftYaHei-Bold, MicrosoftYaHei;font-weight: bold;color: #ffffff;line-height: 30px;letter-spacing: 1px;text-align: center;}&-check {height: calc(100% - 30px);padding: 10px 24px 20px;/*overflow-y: auto;*/.check-name {width: 190px;white-space: nowrap;overflow: hidden;text-overflow: ellipsis;}}}&-right {.sourceBox {}}
}::v-deep .el-checkbox-group {display: flex;flex-direction: column;
}::v-deep .el-checkbox {margin-top: 8px;display: flex;
}
</style>