How to dynamically access value of a property in Javascript object?

Question

I have the following Javascript object:-

var attributes = {
  entityData: {
    Party: 12
  },
  entityType: "Party"
};

Now I want to fetch dynamically the Party property value something like below. How can I do this?

alert(attributes.entityData.{attributes.entityType});

Answer 1

whenever you need to access dynamic property you have to use square bracket for accessing property .
Syntax: object[propery]

var attributes = {
    entityData: {
    Party: 12
  },
  entityType: "Party"
};

alert(attributes.entityData[attributes.entityType]);

alert(attributes.entityData[attributes.entityType]);

Answer 2

You want something like this perhaps:

var attributes = {
    entityData: {
    Party: 12
  },
  entityType: "Party"
};

console.log(attributes.entityData[attributes['entityType']]);

Use square braces instead of curly braces.