JavaScript将数据分组到两个级别的树视图中，最后一个级别是一个数组

const tree = {
  group1: {
    item1: { name: 'Item 1', value: 10 },
    item2: { name: 'Item 2', value: 20 },
  },
  group2: {
    item3: { name: 'Item 3', value: 30 },
    item4: { name: 'Item 4', value: 40 },
  },
};

const treeToArray = (tree) => {
  const result = [];
  
  for (const groupKey in tree) {
    const group = tree[groupKey];
    const groupArray = [];
    
    for (const itemKey in group) {
      groupArray.push(group[itemKey]);
    }
    
    result.push(groupArray);
  }
  
  return result;
};

const treeArray = treeToArray(tree);
console.log(treeArray);