解决数组里循环嵌套问题

//对象嵌套对象
let List = [{
				id: 1,
				name: '1层',
				child: {
					id: 2,
					name: '1-1层'
				}
			}, {
				id: 3,
				name: '2层'
			}, {
				id: 4,
				name: '3层',
				child: {
					id: 5,
					name: '3-1层',
					child:{
						id:6,
						name:'3-1-1层'
					}
				}
			}]
			
			let newList=[]
			List.forEach((item) =>{
				aa(item)
			})
			
			function aa(ul){
				if(ul.child){
					newList.push(ul.name)
					aa(ul.child)
				}else{
					newList.push(ul.name)
				}
			}
			console.log(newList)

let List = [{
				id: 1,
				name: '1层',
				child: [{
					id: 2,
					name: '1-1层',
					child:[{
					id: 2,
					name: '1-1-1层'
				},{
					id: 2,
					name: '1-2-2层'
				},{
					id: 2,
					name: '1-3-3层'
				}]
				},{
					id: 2,
					name: '1-2层'
				},{
					id: 2,
					name: '1-3层'
				}]
			}, {
				id: 3,
				name: '2层'
			}, {
				id: 4,
				name: '3层',
				child: [{
					id: 2,
					name: '3-1层'
				},{
					id: 2,
					name: '3-2层'
				},{
					id: 2,
					name: '3-3层'
				}]
			}]
			
			let newList=[]
			List.forEach((item) =>{
				aa(item)
			})
			
			function aa(ul){
				if(ul.child){
					newList.push(ul.name)
					ul.child.forEach((item) => {
						aa(item)
					})
				}else{
					newList.push(ul.name)
				}
			}
			
			console.log(newList)