const readOnlyObj = {
  name: "some string",
  age: "",
};
 
readOnlyObj.name = "";

const readOnlyObj = {
  name: "some string",
  age: "",
};
 
Object.defineProperties(readOnlyObj, {
  name: {
    writable: false,
  },
});
 
readOnlyObj.name = "";
console.log(readOnlyObj.name);