How to set all values of an object to null in JavaScript?

Question

I need to set all properties of some object to null. But the object can be very big, so I can\'t just do it one by one.

How to set all properties at onc

Answer 1

You can use Object.keys() as Nianyi Wang mentioned in his answer, or a for in, like this:

for (key in obj) {
    if (obj.hasOwnProperty(key)) {
        obj[key] = null;
    }
}

But in this case you should check hasOwnProperty().