javascript - TypeError: Cannot read property 'time' of undefined

Question

I have type error. My variable creating this error while running with node.js. My variable is below. How can I describe my variable correctly ?

let allDevices = {
        1: {
            time: []
        },
        2: {
            time: []
        },
        3: {
            time: []
        }
}

Answer 1

I'm guessing you're trying allDevices.1.time to get the above error message. With numeric object keys, you'd need to reference the numbered object keys using [] instead of . notation:

let allDevices = {
  1: {
    time: []
  },
  2: {
    time: []
  },
  3: {
    time: []
  }
}

console.log(allDevices[1].time) // or allDevices['1'].time