[JavaScript] Todo List only using Prompt

// A S̶i̶m̶p̶l̶e̶  Complicated todo list using JavaScript.

// ENGLISH

// Variables:
// todo - A really constant var that'll only works when parsed into an Object Key & Values
// ^ Don't bother this var, I made it only to enable todoKey & todoValues to !null
// todoKey - Object Keys of todo
// todoValues - You know it already
// quit - It's uhh.. something that makes the loop infinite until we input a quit opt

// How does it work
// You first need to link this script to a simple html doc, then just run it.
// The way this todo works is that they prompt you to input 1 out of 4 opts.
// If you enter something the code don't understand it returns you back to the main while loop
// Such as 'new' and 'delete'.
// The delete.. deletes a todo from the list.
// Note that I made the index from 1 so it kinda look like a real todo list.
// Don't worry, you can delete the todo using the exact number as the index. I coded it below (line 63-68)
// I don't find any bug in this code, I apologize if there's any, sadly I'm just starting to learn JavaScript for 2 weeks by the time I code this.

const todo = {
  1: "Masak aer",
};
const todoKey = Object.keys(todo);
const todoValues = Object.values(todo);
let quit = false;

todoKey.shift();
todoValues.shift();

let input;
while (quit === false) {
  input = prompt(
    "[New] - Add Todo\n[List] - List todo\n[Delete] - Delete todo\n[Quit] - Quit todo\n\nMasukkan opsi"
  );
  while (!input) {
    input = prompt("Masukkan opsi!");
  }
  if (input.toLowerCase() === "new") {
    input = prompt("Masukkan todo baru");
    while (!input) {
      input = prompt("Masukkan todo baru!");
    }

    todoKey.push(todoKey.length + 1);
    todoValues.push(input);
  }

  if (input.toLowerCase() === "list") {
    console.log("\n");
    for (let i = 0; i < todoKey.length; i++) {
      console.log(`${[i + 1]}: ${todoValues[i]}`);
    }
  }

  if (input.toLowerCase() === "delete") {
    input = parseInt(prompt(`Yang mana yang ingin kamu delete?`));
    if (!todoKey[input] === false && !todoValues[input] === false) {
      if (input === 1) {
        todoKey.splice(input, 1);
        todoValues.splice(input, 1);
      } else {
        todoKey.splice(input - 1, 1);
        todoValues.splice(input - 1, 1);
        console.log("UDAH");
      }
    } else {
      console.log("Tidak ada index itu!");
    }
  }

  if (input === "q" || input === "Q" || input === "quit") {
    alert("Ok");
    break;
  }
}