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const obj1 = "prop1":1,"prop2":"foo","prop3":"prop4":2,"prop5":"bar","prop7":"prop9":"prop10":"foo"
const obj2 = "prop1":3,"prop2":"foo","prop3":"prop4":2,"prop5":"foobar","prop6":"new","prop7":"foo":"foo","bar":"baz":"baz"

function get(obj, path) 
 return path.split('.').reduce((r, e) => 
 if (!r) return r;
 else return r[e] , obj);


function isEmpty(o) 
 if (typeof o !== 'object') return true;
 else return !Object.keys(o).length;


function build(a, b, o = null, prev = '') 
 return Object.keys(a).reduce(
 (r, e) => 
 const path = prev + (prev ? '.' + e : e);
 const bObj = get(b, path);
 const value = a[e] === bObj;

 if (typeof a[e] === 'object') 
 if (isEmpty(a[e]) && isEmpty(bObj)) 
 if (e in r) r[e] = r[e];
 else r[e] = true;
 else if (!bObj && isEmpty(a[e])) 
 r[e] = value;
 else 
 r[e] = build(a[e], b, r[e], path);
 
 else 
 r[e] = value;
 
 return r;
 ,
 o ? o : 
 );


function compare(a, b) 
 const o = build(a, b);
 return build(b, a, o);


const result = compare(obj1, obj2);
console.log(result)

const isObject = v => v && typeof v === 'object';

function getDifference(a, b) 
 return Object.assign(...Array.from(
 new Set([...Object.keys(a), ...Object.keys(b)]),
 k => ( [k]: isObject(a[k]) && isObject(b[k])
 ? getDifference(a[k], b[k])
 : a[k] === b[k]
 )
 ));


var obj1 = prop1: 1, prop2: "foo", prop3: prop4: 2, prop5: "bar" ,
 obj2 = prop1: 3, prop2: "foo", prop3: prop4: 2, prop5: "foobar" , prop6: "new" ;

console.log(getDifference(obj1, obj2));

const obj1=prop1:1,prop2:"foo",prop3:prop4:2,prop5:"bar",prop7:pro8:"only in 1",
 obj2=prop1:3,prop2:"foo",prop3:prop4:2,prop5:"foobar", prop6: "only in 2";
 
const isObject = val => val && typeof val === 'object'; // required for "null" comparison

function compare(obj1, obj2) 
 let equality = ,
 merged = ...obj1, ...obj2 ; // has properties of both

 for (let key in merged) 

 return equality;


console.log(compare(obj1, obj2))

var obj1 = 
 prop1: 1,
 prop2: "foo",
 prop3: 
 prop4: 2,
 prop5: "bar"
 ,
 prop7: ,
 

 var obj2 = 
 prop1: 3,
 prop2: "foo",
 prop3: 
 prop4: 2,
 prop5: "foobar"
 ,
 prop6: "new",
 prop7: ,
 prop8: ,
 

 var result = ;

 function compare(obj1, obj2, obj_) 
 for (let k in obj1) 
 var type = typeof obj1[k];
 if (type === 'object') 
 obj_[k] = ;
 if (!obj2[k])
 obj_[k] = false;
 else if ((Object.entries(obj1[k]).length === 0 && obj1[k].constructor === Object) && (Object.entries(obj2[k]).length === 0 && obj2[k].constructor === Object)) 
 obj_[k] = true;
 else 
 compare(obj1[k], obj2[k], obj_[k]);
 
 else 
 obj_[k] = (obj1[k] === obj2[k]);
 

 
 

 if (Object.keys(obj1).length < Object.keys(obj2).length) //check if both objects vary in length.
 var tmp = obj1;
 obj1 = obj2;
 obj2 = tmp;
 

 compare(obj1, obj2, result);

 console.log(result);