convert deep nested array of object into plain tab separated string

Question

i have three-level or more nested JSON I need to convert it into nice looking string

for example

let a = {
    "spec":[
        {'key': 'General', 'values': [
            {'key': 'Model Number', 'value': 'REDMI'},
            {'key': 'Year of Manufacture', 'value': '2022'},
            {'key': 'SIM Type', 'value': 'Dual Sim'}
        ]},
        {'key': 'OS & Processor Features', 'values': [
            {'key': 'Operating System', 'value': 'Andriod'
            },
            {'key': 'Processor Type', 'value': 'MediaTek'
            },
            {'key': 'Processor Core', 'value': 'Octa Core'
            },
            {'key': 'PCS', 'value': '2 GHz'
            },
        ]
    }
        
    ]
}

into something like this

General
  Model Number : REDMI
  Year of Manufacture : 2022
  SIM Type : Dual Sim
OS & Processor Features
  Operating System : Andriod
  Processor Type : MediaTek
  Processor Core : Octa Core
  PCS', 'value': '2 GHz\

Answer 1

Here you go:

let a = {...}
let formattedText = ""
for (let spec of a["spec"]) {
  formattedText += spec["key"] + "\n"
  for (let value of spec["values"]) {
    formattedText += `\t${value["key"]} : ${value["value"]}\n`
  }
}

return formattedText