TypeError : Cannot convert undefined or null to object javascript

Question

I am getting one type error with my JSON, I am constructing a tree based on json, My JSON structure in not static fields and key values are dynamic,

When I have JSON data -

const data = [
  
  {
    "class": "abc",
    magList: "",
    authKeyMgmtMode: {
      "class": "OctetString",
      octets: "00"
    },
    wsEnable: true,
    wlans: true,
    wsle: true,
    busey: "567ff7c5[180188_180188,temp-ssid_Global_NF_e06779e9]",
    sspe: 0
  }
];

It works fine below is sandbox - Code sandbox - https://codesandbox.io/s/flamboyant-blackwell-dw5yn?file=/index.js

When I add one more value as

Ipv6Name: null,

In json array it's giving me error,

Error - Cannot convert undefined or null to object

Object.keys(object).map((key, reactKey) => {

I have checked the references for same error, but not able to proceed. Please guide me.

Edited -

I noticed I was sending null to Object.keys but I was doing check in isPrimative function I was using the check but there were typo and few logical mistake, I was checking typeof value === null , Thanks for pointing out...

You're sending null to Object.keys

Aleksey L.
– Aleksey L.

2020-10-12 06:43:12 +00:00
Commented Oct 12, 2020 at 6:43 — Aleksey L.
– Aleksey L., Commented Oct 12, 2020 at 6:43
Yes, observed that,

FrontEnd Expert
– FrontEnd Expert

2020-10-12 06:46:03 +00:00
Commented Oct 12, 2020 at 6:46 — FrontEnd Expert
– FrontEnd Expert, Commented Oct 12, 2020 at 6:46

Iosif · Accepted Answer · 2020-10-12 06:41:58Z

1

Use this code because type of null is object:

isPrimative = (value) => {
    return (
      typeof value === "string" ||
      typeof value === "" ||
      typeof value === "number" ||
      typeof value === "boolean" ||
      value === null
    );
  };

answered Oct 12, 2020 at 6:41

Iosif

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2 Comments

FrontEnd Expert Over a year ago

Thanks, I noticed I am sending null to Object.keys but down in isPrimative function I was using the check but there were typo and few logical mistake, I was checking typeof value === null , Thanks for pointing out...

Ilijanovic Over a year ago

its written "primitive"

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