const treeData = 
[{
	title: 'Samples',
	id: 1,
	checked: true,
	spread: true,
	children: [{
		title: '二级1-1',
		id: 3,
		href: 'https://www.layui.com/',
		children: [{
			title: '三级1-1-3',
			id: 23,
			children: [{
				title: '四级1-1-3-1',
				id: 24,
				children: [{
					title: '五级1-1-3-1-1',
					id: 30,
					field: ''
				},
				{
					title: '五级1-1-3-1-2',
					id: 31,
				}]
			}]
		},
		{
			title: 'Get started',
			id: 7,
			children: [{
				title: '四级1-1-1-1',
				id: 15,
				href: 'https://www.layui.com/doc/'
			}]
		},
		{
			title: '三级1-1-2',
			id: 8,
			children: [{
				title: '四级1-1-2-1',
				id: 32,
			}]
		}]
	},
	{
		title: 'Latest samples',
		id: 4,
		spread: true,
		children: [{
			title: '三级1-2-1',
			id: 9,
			disabled: true
		},
		{
			title: '三级1-2-2',
			id: 10,
		}]
	},
	{
		title: '二级1-3',
		id: 20,
		children: [{
			title: '三级1-3-1',
			id: 21,
		},
		{
			title: '三级1-3-2',
			id: 22,
		}]
	}]
},
{
	title: 'Get started',
	id: 2,
	spread: true,
	children: [{
		title: '二级2-1',
		id: 5,
		spread: true,
		children: [{
			title: '三级2-1-1',
			id: 11,
		},
		{
			title: '三级2-1-2',
			id: 12,
		}]
	},
	{
		title: '二级2-2',
		id: 6,
		children: [{
			title: '三级2-2-1',
			id: 13,
		},
		{
			title: '三级2-2-2',
			id: 14,
			disabled: true
		}]
	}]
},
{
	title: 'Latest samples',
	id: 16,
	children: [{
		title: '二级3-1',
		id: 17,
		fixed: true,
		children: [{
			title: '三级3-1-1',
			id: 18,
		},
		{
			title: '三级3-1-2',
			id: 19,
		}]
	},
	{
		title: '二级3-2',
		id: 27,
		children: [{
			title: '三级3-2-1',
			id: 28,
		},
		{
			title: '三级3-2-2',
			id: 29,
		}]
	}]
}]