script.js

// 1st task : compare 2 JSON properties

let obj1={
    name:"person1",
    age:5
};
let obj2={
    age:5,
    name:"person1"
}
let str1 = JSON.stringify(obj1);
let str2 = JSON.stringify(obj2);
console.log(str1);
console.log(str2);

function compareJSON(obj1, obj2) { 
    
    if (Object.keys(obj1).length !== Object.keys(obj2).length) { 
      return false; 
    } 
   
    for (let key in obj1) { 
      
      if (obj1.hasOwnProperty(key) && obj2.hasOwnProperty(key)) { 
        if (obj1[key] !== obj2[key]) { 
          return false; 
        } 
      } else { 
        return false; 
      } 
    } 
   
    return true; 
  } 
  console.log(compareJSON(obj1, obj2));



//2nd task display all country flags

var request = new XMLHttpRequest();
request.open("GET","https://restcountries.com/v3.1/all",true)
request.send();
request.onload=function(){
    var data = request.response;
    
    var result = JSON.parse(data);
    
    for(var i=0;i<result.length;i++){
        console.log("Flags:"+result[i].flags.png);
    }
}



//3rd task display all country names, region, sub-region, population

var request1 = new XMLHttpRequest();
request1.open("GET","https://restcountries.com/v3.1/all",true)
request1.send();
request1.onload=function(){
    var data1 = request1.response;
    //console.log(data);
    var result1 = JSON.parse(data1)
    
    for(var i=0;i<result1.length;i++){
        console.log("Country Name:"+result1[i].name.common+" ","Region:"+result1[i].region+" ","Sub-region:"+result1[i].subregion+" ","Population:"+result1[i].population);
    }
}