let obj = {
    body: {
        tagName: 'body',
        attrs: {},
        paired: true,
        children: [
            {
                tagName: 'div',
                attrs: {},
                paired: true,
                children: [
                    {
                        tagName: 'span',
                        attrs: {},
                        paired: true,
                        children: ['Enter data please:']
                    },
        
                    {
                        tagName: 'br',
                        paired: false
                    },
        
                    {
                        tagName: 'input',
                        attrs: {
                            type: 'text',                            
                            id: 'name'
                        },
                        paired: false
                    },
        
                    {
                        tagName: 'input',
                        attrs: {
                            type: 'text',
                            id: 'surname'
                        },
                        paired: false
                    }
                ]
            },
            {
                tagName: 'div',
                attrs: {},
                paired: true,
                children: [
                    {
                        tagName: 'button',
                        attrs: {
                            id: 'ok'
                        },
                        paired: true,
                        children: ['Ok']
                        
                    },
                    {
                        tagName: 'button',
                        attrs: {
                            id: 'cancel'
                        },
                        paired: true,
                        children: ['Cancel']
                    },
                ],
            },
        ]
    }
}

console.log(obj.body.children[0].children[0].children[0])

console.log(obj.body.children[1].children[1].attrs.id)
console.log(obj.body.children[0].children[1].tagName)