How to get a nested property of an object with dot notation

getNestedPropValWithDotNotation.js

/*
* Returns the value of a property in a nested object.
*
* @param {Object} sourceObject
* @param {string} dotNotationPath
* @returns {*}
*
*/

function getPropValue(sourceObject, dotNotationPath) {
  let returnData = sourceObject;

  dotNotationPath.split(".").forEach(subPath => {
    returnData = returnData[subPath] || `Property ${subPath} not found`;
  });

  return returnData;
}

Usage example:

const myObject = {
  foo: {
    bar: {
      baz: 123
    },
    xyz: "test"
  }
};

const myPath = "foo.bar.baz";
const mySecondPath = "foo.xyz";

console.log(getPropValue(myObject, myPath)); // 123
console.log(getPropValue(myObject, mySecondPath)); // "test"