A Pen by Justin Perry.

script.js

var obj = {
  key1 : 'key1Value1',
  key2 : {
    subKey1 : 'subKey4Value1',
    subKey2 : 'subKey2Value2',
    subKey3 : 'subKey3Value3',
    subKey4 : 'subKey4Value4'
  },
  key3 : {
    subKey1 : {
      subSubKey1 : 'subSubKeyValue1',
      subSubKey2 : 'subSubKeyValue2',
      subSubKey3 : 'subSubKeyValue3',
      subSubKey4 : 'subSubKeyValue4'
    }
  },
  key4 : {
    subKey1 : {
      subSubKey1 : {
        subSubSubKey1 : 'subSubSubKeyValue1'
      }
    }
  }
};
function get(keys){
  keys = keys.split('.');
  
  var _from = function(obj) {
    var context = obj;
    for(var i = 0; i < keys.length;i++) {
      if(context.hasOwnProperty(keys[i])) {
        context = context[keys[i]];
      }
      else {
        return undefined;
      }
    }
    return context;
  };
  
  return {
    from : _from
  };
}

console.log(get('key1').from(obj) ); // key1Value1
console.log(get('key2').from(obj) ); // Object {subKey1: "key6subkeyvalue1", subKey2: "key6subkeyvalue2", subKey3: "value3", subKey4: "value4"} 
console.log(get('key3.subKey1').from(obj) ); // Object {subSubKey1: "subSubKeyValue1", subSubKey2: "subSubKeyValue2", subSubKey3: "subSubKeyValue3", subSubKey4: "subSubKeyValue4"
console.log(get('key3.subKey1.subSubKey1').from(obj) ); // subSubKeyValue1
console.log(get('key4.subKey1.subSubKey1.subSubSubKey1').from(obj) ); // subSubSubKeyValue1
console.log(get('something.that.is.not.there').from(obj) ); // undefined

Simple-get()-function-for-retrieving-deeply-nested-keys-using-dot-notation.markdown

Simple get() function for retrieving deeply nested keys using dot notation

A Pen by Justin Perry on CodePen.

License.