el-tree限制选中个数
<el-treestyle="max-width: 600px":data="Treedata":check-strictly="true"show-checkboxnode-key="id":props="defaultProps":default-expanded-keys="['1', '2']"ref="treeRef"@check="handleCheckChange"/>const handleCheckChange = (data: any, checked: any) => {const selectedNodes = treeRef.value.getCheckedNodes();if (selectedNodes.length > 3 && checked) {treeRef.value.setChecked(data, false); // 取消选中超出限制的节点ElMessage.warning(`您最多只能选择 ${3} 个节点！`);}
};const handleCheckChange= (currNode: any, checkedInfo: any) => {let checkedKeys = checkedInfo.checkedKeys || [];let treeNodesMap = treeRef.value.store?.nodesMap || {};let status = checkedKeys.length >= 3;if (status) {ElMessage.warning(`您最多只能选择 ${3} 个节点！`);}Object.keys(treeNodesMap).forEach((key) => {let item = treeNodesMap[key] || {};if (!checkedKeys.includes(key)) {let data = item.data || {};data.disabled = status;treeRef.value.setCurrentNode(data);}});
};