Country column format

Abhijit_Swami1716 Here is the code I used: 

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "inlineEditField": "[$Country]",
  "children": [
    {
      "elmType": "img",
      "attributes": {
        "src": "=if(@currentField,('https://www.worldometers.info/img/flags/' + if(indexOf(@currentField,'Afganistan')==0,'af', if(indexOf(@currentField,'Albania')==0,'al',if(indexOf(@currentField,'Alemania')==0,'gm', if(indexOf(@currentField,'Argelia')==0,'ag', if(indexOf(@currentField,'Argentina')==0,'ar', if(indexOf(@currentField,'Andorra')==0,'an', if(indexOf(@currentField,'Antigua y Barbuda')==0,'ac',if(indexOf(@currentField,'Arabia Saudita')==0,'sa',if(indexOf(@currentField,'Zambia')==0,'za',if(indexOf(@currentField,'Zimbabue')==0,'zi','no')))))))))) + '-flag.gif'),'')",
        "title": ""
      },
      "style": {
        "max-width": "23px",
        "padding": "0 6px 0 0"
      }
    },
    {
      "elmType": "span",
      "txtContent": "@currentField"
    }
  ]
}

I have added conditions for only few countries in above JSON. You can add more conditions as per your requirements.

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