Get an object value from path and return undefined if not found

get-object-value-from-path.js

// Get an object value from path

function getValue(obj, path) {
  var keys = path.split('.')
  for (var i = 0; i < keys.length; i++) {
    try {
      obj = obj[keys[i]]
    } catch(e) {
      return
    }
  }
  return obj
}

const obj = { a: 1, b: { c: 2 } }

let value = getValue(obj, 'a')
console.log(value) // 1

value = getValue(obj, 'b.c')
console.log(value) // 2

Without try catch:

function getValue(obj, path) {
  const keys = path.split('.')
  for (let i = 0; i < keys.length; i++) {
    if (!(obj = obj[keys[i]])) return
  }
  return obj
}