Is it possible to update Object key without generating new object and delete older object?

Definitely, you are not creating another object from ‘rowObj’ using your code.

Inside object, if you want to add suffix or prefix to all the keys as ‘_new’ or ‘new_’, you need to loop your all the keys.

To do so, use “Object.keys(rowObj)” method, it will give you an array of all available keys inside rowObj.

Try below code,

var key;for (key in rowObj) { if (rowObj.hasOwnProperty(key)) { rowObj[key + "_new"] = rowObj[key]; delete rowObj[key]; // Or You can put rowObj[key] = undefined, if is ok to use for your code. }}

Hope, it will work for you!

Yeah, this can be done in the best way, thanks for sharing.