A way to recursively get or set a property dynamically at any level within an object.

objectPropertyHandling.js

const getObjectProperty = (object, properties) => {
  return properties.length === 0 ? object : getObjectProperty(object[properties[0]], properties.slice(1))
}

const setObjectProperty = (object, properties, value) => {
  if (properties.length === 1) {
    object[properties[0]] = value
  }
  getObjectProperty(object, properties.slice(0, properties.length - 1))[properties[properties.length - 1]] = value
}

// Working example
const example = { a: { b: { c: [ { d: 1 } ] } } }
console.log('Before:', getObjectProperty(example, ['a', 'b', 'c', 0, 'd']))
setObjectProperty(example, ['a', 'b', 'c', 0, 'd'], 0) // Changes example.a.b.c[0].d from 1 to 0
console.log('After:', getObjectProperty(example, ['a', 'b', 'c', 0, 'd']))