Convert string in dot notation into an object with JavaScript

dotPathToObject.js

const dotPathToObject = (pathStr, value) => pathStr
    .split(".")
    .reverse()
    .reduce((acc, cv, index) => ({
        [cv]: index === 1 && value ? {[acc]: value} : acc
    }))


console.log("expect:", JSON.stringify({
    "a": {
      "b": {
        "c": {
          "d": "e"
        }
      }
    }
  }
));

console.log("return:", JSON.stringify(
  dotPathToObject("a.b.c.d", "e")
))

/*
expect: {"a":{"b":{"c":{"d":"e"}}}}
return: {"a":{"b":{"c":{"d":"e"}}}}
*/