Set.prototype.delete()

const set = new Set();
set.add({ x: 10, y: 20 }).add({ x: 20, y: 30 });

// `x > 10` 
set.forEach((point) => {
  if (point.x > 10) {
    set.delete(point);
  }
});

console.log(set.size);
// : 1

setInstance.delete(value)

const mySet = new Set();
mySet.add("foo");

mySet.delete("bar"); //  false 
mySet.delete("foo"); //  true 

mySet.has("foo"); //  false 

const setObj = new Set(); // 

setObj.add({ x: 10, y: 20 }); // 

setObj.add({ x: 20, y: 30 }); // 

// `x > 10` 
setObj.forEach((point) => {
  if (point.x > 10) {
    setObj.delete(point);
  }
});