When are consts actually immutable?

consts.js

// TURNS OUT NOT ALWAYS

const name = "Jim";
name = "James"; // error cannot mutate constants

const age = 1;
age = 2; // Error

const active = true;
active = false // error

const names = ['Jim', 'James'];
names[2] = 'Bob'; // No error, const is shallow

const restaurant = {
  name: 'Bobs Burgers'
};
restaurant.name: 'Jims Burgers'; // No error, const is shallow

const firstNames = ['Bob', 'Jim', 'Jon'];
const lastNames = ['Smith', 'Johnson', 'Anderson'];
firstNames = lastNames; // Error! You tried to change a reference!