JavaScript – How to access second object of an object

December 9, 2021

I need to access the last month data of an API, but I don’t know how could I access the 2nd object, without hard coding the date like so:
const data = [data.data['Monthly Time Series']['2021-11-30']]. In this example currently I would need the November data from the ‘Monthly Time Series’, but I need it to be dynamic instead of writing out the date, so it will always show the actual past month data. I would appreciate any help.

This is how the JSON looks like:

{
  "Meta Data": {
    "1. Information": "Monthly Prices (open, high, low, close) and Volumes",
    "2. Symbol": "IBM",
    "3. Last Refreshed": "2021-12-08",
    "4. Time Zone": "US/Eastern"
  },
  "Monthly Time Series": {
    "2021-12-08": {
      "1. open": "118.2500",
      "2. high": "123.3800",
      "3. low": "116.5600",
      "4. close": "123.0200",
      "5. volume": "33320654"
    },
    "2021-11-30": {
      "1. open": "125.0500",
      "2. high": "127.2900",
      "3. low": "114.5600",
      "4. close": "117.1000",
      "5. volume": "119252012"
    },

>Solution :

This might look a little complicated but it definetely gives you the last date of your Monthly entries

let data = {
  "Meta Data": {
    "1. Information": "Monthly Prices (open, high, low, close) and Volumes",
    "2. Symbol": "IBM",
    "3. Last Refreshed": "2021-12-08",
    "4. Time Zone": "US/Eastern"
  },
  "Monthly Time Series": {
    "2021-12-08": {
      "1. open": "118.2500",
      "2. high": "123.3800",
      "3. low": "116.5600",
      "4. close": "123.0200",
      "5. volume": "33320654"
    },
    "2021-11-30": {
      "1. open": "125.0500",
      "2. high": "127.2900",
      "3. low": "114.5600",
      "4. close": "117.1000",
      "5. volume": "119252012"
    }
  }
}

console.log(
  data["Monthly Time Series"]
  [Object.keys(data["Monthly Time Series"])
  [Object.keys(data["Monthly Time Series"]).length - 1]]) // This gets you the last entry