How to use object rest operator to omit properties dynamically

Question

I'm using the ES7 Object Rest Operator to Omit Properties from an object, but I'd like to make it more flexible so that I can dynamically provide the list of properties to exclude.

const myObject = {
  a: 1,
  b: 2,
  c: 3
};
const { a, ...noA } = myObject;
console.log(noA); // => { b: 2, c: 3 }

Is there a way to make this more dynamic such that I can call a function and provide an array of properties to exclude instead of the hardcoded approach taken with properties a and b in this example?

Ideally I could have something along these lines -- but this syntax is invalid:

function omitProperties(myObj, fieldsToExclude) {
  const { ...fieldsToExclude, ...noA } = myObj;
  console.log(noA); // => { b: 2, c: 3 }
} 

omitProperties(myObject, [`a`]);

score 0 · Answer 1 · answered Jan 27 '23 at 17:42

You can consider _.omit.

You can also consider the following:

let omitProperties = (props, exclude) => {
  let result = { ...props };
  for (let propName of exclude) delete result[propName];
  return result;
};

There's quite a bit of discussion about this same issue here.

How to use object rest operator to omit properties dynamically

1 Answers1