'use strict';

//
// script.js: minimal JS for pablotron.org
//
// - set theme on page load
// - bind theme switcher and burger menu event handlers
//
// current sizes (2025-04-01):
// - minified: 699 bytes
// - minified/compressed: 508 bytes
//
// notes below are slightly out of date...
//
// theme switcher (2024-05-27)
// ---------------------------
// does the following:
//
// 1. checks for user setting and use that, if present.
// 2. otherwise default to dark mode.
//
// refs:
// https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme
// https://www.smashingmagazine.com/2024/03/setting-persisting-color-scheme-preferences-css-javascript/
// https://css-tricks.com/approaches-media-queries-sass/
// https://stackoverflow.com/questions/59621784/how-to-detect-prefers-color-scheme-change-in-javascript
//
// burger menu
// -----------
// src: https://bulma.io/documentation/components/navbar/
//
// Note (2022-03-05): I initially switched from Array.prototype.slice()
// to Array.from() and added "const D = document;" to shrink the
// minified, uncompressed code from 307 bytes to 292 bytes for a ~4.9%
// (15 bytes) size reduction.
//
// Then, I dropped Array.from() entirely, since all modern browsers (see
// URL below) support NodeList.forEach().
//
// Ref: https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach
//
// This shrunk the minified, uncompressed size to 280 bytes, for a
// ~8.8% (27 bytes) cumulative size reduction.
//
// I also tried switching from forEach to for..of, but that increased
// the minified, uncompressed size by a two bytes.
//

// aliases
const D = document,
      C = D.body.parentElement.classList,
      L = localStorage,
      M = window.matchMedia,
      on = (el, id, fn) => el.addEventListener(id, fn);

// light theme selected by user?
if (L && L.theme && L.theme === 'light') {
  C.remove('dark'); // set light theme
}

D.addEventListener('DOMContentLoaded', () => {
  // theme toggle event handler
  on(D.querySelector('.navbar-item[data-id="theme"]'), 'click', e => {
    e.preventDefault(); // stop event
    L.theme = C.toggle('dark') ? 'dark' : 'light'; // toggle theme
  });

  // iterate through burgers, bind to click events
  D.querySelectorAll('.navbar-burger').forEach(e => on(e, 'click', () => {
    // then toggle is-active on burger and menu
    [e, D.getElementById(e.dataset.target)].forEach(
      e => e.classList.toggle('is-active')
    )
  }));
});