Delete specific elements in multidimensional object array in JS

 1. Define an array first, and store objects in the array. The object contains a child array, and the level is variable, as follows:

let arr = [
    {
        id: 1,
        name: '李渊',
        age: 100,
        children: [
            { id: 2, name: '李建成', age: 80, children: [] },
            {
                id: 3,
                name: '李世民',
                age: 70,
                children: [
                    {id: 5, name: '李承乾', age: 50},
                    {id: 6, name: '李宽', age: 40},
                    {id: 7, name: '李恪', age: 30},
                ]
            }, 
            { id: 4, name: '李玄霸', age: 65, children: [] }
        ]
    },
    
]

2. Realize the deletion of data that meets the conditions, such as deletion of "age<60";

// 递归删除数组中符合条件的元素，并返回新数组
function handleData(array) {
    return array.reduce((prev, item, index) => {
      if (item.age < 60) {
        return prev
      }
      prev[index] = item
      if (item.children) {
        prev[index].children = this.handleData(item.children)
      }
      return prev
    }, [])
  }

3. Call this method and the return result is as follows:

Welcome everyone to consult. If you have a simpler method, you can share it in the comment area, thank you!