How to assign multiple values to a JavaScript object?

Question

Say that I have an object with key/value pair as the following:

var someVar = {
    color: "white",
    font_size: "30px",
    font_weight: "normal"
...some more variables and functions
};

Is there a way to do a multiple assignment to those keys instead of having to do something like this:

someVar.color = "blue";
someVar.font_size = "30px";
...

Answer 1

With ES2015 you can use Object.assign:

const someVar = {
    color: "white",
    font_size: "30px",
    font_weight: "normal"
};

const newVar = Object.assign({}, someVar, { 
    color: "blue", 
    font_size: "30px"});

console.log(newVar);

=>

{
    color: "blue",
    font_size: "30px",
    font_weight: "normal"
}