小编Bis*_*uju的帖子

let carStr = `{
  "_id": "Tesla-200",
  "Design": {
    "Wheel": "Black",
    "Seat": "4",
    "Speed": "200"
  }
}`;
let car = JSON.parse(carStr);


let key = "Design.Wheel";


let keys = key.split(".");
let value = car[keys[0]][keys[1]]; // Need to get this value dynamically rather than hard-coding
console.log(value);