如何从JavaScript中的嵌套对象访问密钥

Question

Can you please help me how can I access "name" key from obj3. Please find below example.

I am looking for good approch, I dont want to do :

obj.obj1.obj2.obj3.name

var obj = {
    obj1 : {
        obj2: {
            obj3: {
                name: 'jhon'
            }
        }
    }
}

Thanks!

Answer 1

您可以在理论上使用es6解构

const {obj1: {obj2: { obj3: {name: b}}}} = obj console.log(b) //jhon

Answer 2

You can use a recursive function that returns the first non object element.

Obviously this functions works only for structures where the nested objects contains only one object or one value.

var obj = {
    obj1 : {
        obj2: {
            obj3: {
                name: 'jhon'
            }
        }
    }
}

const getName = (obj) => {
    if (typeof obj[Object.keys(obj)] === 'object') {
        return  getName(obj[Object.keys(obj)])
    } else {
        return obj[Object.keys(obj)]
    }
}

getName(obj)