How to get to item in object with Object.keys-CodePudding

I have been starting to look at javascript objects, and I have found the format that looks like this.

var obj = {
        prop1: 5,
        obj2: {
          prop1: [3, 6, 3],
          prop2: 74,
          4_3: {
            str: "Hello World"
          }
        }
      };

My question is. How do I get the console to say the string?

I have tried something like this:

console.log(obj.obj2[Object.keys(obj.obj2)[2]].str);

But it didn't work.

CodePudding user response：

I'm not change the input this time

var obj = {
  prop1: 5,
  obj2: {
    prop1: [3, 6, 3],
    prop2: 74,
    4_3: {
      str: "Hello World"
    }
  }
};

console.log(obj.obj2[Object.keys(obj.obj2)[0]].str);

CodePudding user response：

Why not just reference?

var obj = {
        prop1: 5,
        obj2: {
          prop1: [3, 6, 3],
          prop2: 74,
          4_3: {
            str: "Hello World"
          },
        }
      };
      
console.log(obj.obj2['43'].str);

CodePudding user response：

You can do that using Object.values.

var obj = {
        prop1: 5,
        obj2: {
          prop1: [3, 6, 3],
          prop2: 74,
          4_3: {
            str: "Hello World"
          },
        }
      };
      
console.log(obj.obj2[4_3].str);