递归遍历一个树形结构数组，如果有id为1的对象，把变量flag设为true，否则变量flag设为false

function traverseTree(arr, flag) { for (let i = 0; i < arr.length; i ) { if (arr[i].id === 1) { flag = true; break; } if (arr[i].children && arr[i].children.length > 0) { flag = traverseTree(arr[i].children, flag); if (flag) { break; } } } return flag; } // Example const tree = [{ id: 0, children: [{ id: 1 }] }, { id: 2, children: [{ id: 3 }] }]; let flag = false; if (traverseTree(tree, flag)) { console.log('Flag is true'); } else { console.log('Flag is false'); }