data-for-nested-search-question.js

var nestedObject = {
  data: {
    info: {
      stuff: {
        thing: {
          moreStuff: {
            someVal: 40,
            something: 'foo2'
          }
        }
      }
    }
  }
}

let hasIt = containsInNestedObject(nestedObject, 40); // true
let doesntHaveIt = containsInNestedObject(nestedObject, "foo"); // false

console.log(hasIt, doesntHaveIt);