To update the attribute value of an object using the map function in JavaScript, we return the updated object.

For instance, we write

const editSchoolName = (schools, oldName, name) =>
  schools.map((item) => {
    if (item.name === oldName) {
      return { ...item, name };
    } else {
      return item;
    }
  });

to define the editSchooName function that returns a new version of the schools array that has entries mapped from schools with the objects updated if they have name property equal to oldName.