[Fixed] How to merge 2 json objects in javascript

Issue

example:
Below there are 2 json objects with different values and I want to make it as one final Json object and append new value to the final result

let json1= {
"b":"test1",
"a":"test3",
"type":"sample1"
}

let json2= {
"b":{
"endDate":"ddd1",
"startDate":"dd01"
},
"a":{
"endDate":"31",
"startDate":"01"
},
"type":"sample2"
}

Expected results should be like below

let result = {
"b":{
"endDate":"ddd1",
"startDate":"dd01",
"XYZ":"test1"
},
"a":{
"endDate":"31",
"startDate":"01",
"XYZ":"test3"
},
}

Can anyone help please using JavaScript or loadash functionality

Solution

You can use the rest operator to remove type property and then assign values from 1st object to new property of the merged object

let mergeObjects = (a, b) => {

    let {type, ...rest} = b; //remove type property
    for(let prop in rest){
        if(a[prop]){
            rest[prop].xyz = a[prop]; 
        }
    }
    return rest;
}

let Object3= mergeObjects(Object1, Object2);
console.log(Object3);