[manual] Build a Night Mode for Harmony

[brazzerstop]

Hi everybody,

On this tutorial I want to show you, how to create a Night Mode on you're forum, to do this we need use a HTML widget in the Brand Header (global/brand-header).

Step 1

Create a button as in the gif

<nav>
<div class="theme-switch-wrapper d-flex align-self-center">
<label class="theme-switch" for="checkbox">
<input type="checkbox" id="checkbox" />
<div class="slider border rounded-pill">
<div class="moon-sun p-1">
<i class="fa-solid fa-moon text-white float-start"></i>
<i class="fa-solid fa-sun text-warning float-end"></i>
</div></div>
</label>
</div>
</nav>

Step 2

We create a CSS style for the night mode

<style>

/* css for night mode */

[data-theme="dark"] {
    --font-color: #e1e1ff;
    --bs-body-bg: #202124;
    --bs-body-color: #f1f3f4;
    --bs-body-color-rgb: 255,255,255;
    --bs-nav-link-color: #fff;
    --bs-border-color: #35363a;
    --bs-body-bg-rgb: 32,33,36;
    --bs-light-rgb: 32,33,36;
}

[data-theme="dark"] hr { border-top-color: #262729;  }
[data-theme="dark"] .active .chat-room-btn { background-color: #262729; }
[data-theme="dark"] { .btn-outline { border-color: #b6b6b6; } }
[data-theme="dark"] { .btn-outline.active, .btn-outline:hover, .btn-link.active, .btn-link:hover { background-color: #35363a; } }
[data-theme="dark"] { .btn-ghost.active, .btn-ghost:hover, .btn-ghost-sm.active, .btn-ghost-sm:hover { background-color: #262729; } }
[data-theme="dark"] .skin-noskin .composer { background-color: #262729!important; }
[data-theme="dark"] .skin-noskin .bottombar-nav .dropdown-menu { background-color: #262729 !important; }
[data-theme="dark"]  .bottombar-nav .nav-text { color: #ffffff; }
[data-theme="dark"] .composer .resizer { background: linear-gradient(transparent,#262729); }
[data-theme="dark"] .skin-noskin .bottombar-nav { background-color: #262729!important; }
[data-theme="dark"] .page-topic .pagination-block.ready { background-color: #202124 !important; border-color: #262729 !important; }
[data-theme="dark"] .form-control { background-color: #262729; border: 1px solid #35363a; color: #b6b6b6; }
[data-theme="dark"] .form-control:focus { color: white; background-color: #262729; border-color: #262729; box-shadow: inset 0px 0px 0px rgba(0,0,0,.075), 0 0 0 0.05rem rgb(27 115 249); }
[data-theme="dark"] .dropdown-item:hover { color: white; background-color: #262729; }
[data-theme="dark"] .tag-list .tag { background-color: #262729; color: white; }
[data-theme="dark"] .breadcrumb .breadcrumb-item span { color: #b6b6b6; }
[data-theme="dark"] .card { --bs-card-cap-bg: rgba(38,39,41); background-color: #262729; }
[data-theme="dark"] .skin-noskin nav.sidebar { background-color: #202124!important; }
[data-theme="dark"] .sidebar .nav-link.active { background-color: #35363a; }
[data-theme="dark"] { .sidebar .nav-link:focus, .nav-link:hover { background-color: #35363a !important; color: white; } }
[data-theme="dark"] .sticky-tools { background-color: #202124; }
[data-theme="dark"] .text-muted { color: #b6b6b6!important; }
[data-theme="dark"] nav-btn:hover { background-color: #35363a; }
[data-theme="dark"] .btn-ghost-sm:hover { background-color: #35363a; }
[data-theme="dark"] .btn:hover { background-color: #202124; border-color: #62656f; }
[data-theme="dark"] { .dropdown-menu, .dropdown-item { background-color: #202124; color: #f1f3f4; } }
[data-theme="dark"] .border-gray-300 { border-color: #35363a!important; }
[data-theme="dark"] ul.topics-list li.selected { background-color: #262729; }
[data-theme="dark"] .modal-content { background-color: #35363a; }
[data-theme="dark"] .account .avatar-wrapper { border: 4px solid #262729; }

@media (min-width: 576px) {
[data-theme="dark"] .topic .pagination-block .scroller-container { border-left: 2px solid #35363a; }
[data-theme="dark"] .page-topic .topic .posts.timeline>[component=post] { border-left: 2px solid #35363a; }
[data-theme="dark"] .page-topic .topic .posts.timeline>[component=post]:first-child:before { background-color: #35363a; }
[data-theme="dark"] .page-topic .topic .posts.timeline>[component=post]:last-child:after { background-color: #35363a; }
}

/* css for the switch a night/light */

.theme-switch {
  display: inline-block;
  height: 26px;
  position: relative;
  width: 55px;
}

.theme-switch input { display:none; }

.slider {
  background-color: #ffffff;
  bottom: 0;
  cursor: pointer;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  transition: .4s;
}

.slider:before {
  background-color: #1b73f9;
  bottom: 3px;
  content: "";
  height: 18px;
  width: 18px;
  left: 4px;
  position: absolute;
  transition: .4s;
  border-radius: 50px;
}

input:checked + .slider { background-color: #262729; }
input:checked + .slider:before { transform: translateX(28px); }

</style>

To change logo in dark mode add this code to css:

[data-theme="dark"] [component="brand/logo"] { content: url(/link/to/logo-for-dark-mode.png); }

This style was created for the Harmony theme without modifications, if you use custom style, you need change this css for you're personal theme style.

Step 3

Now create a JavaScript to switch a night/light mode and save choice in browser LocalStorage if user was refresh the page.

<script>
const toggleSwitch = document.querySelector('.theme-switch input[type="checkbox"]');
const currentTheme = localStorage.getItem('theme');

if (currentTheme) {
    document.documentElement.setAttribute('data-theme', currentTheme);
  
    if (currentTheme === 'dark') {
        toggleSwitch.checked = true;
    }
}

function switchTheme(e) {
    if (e.target.checked) {
        document.documentElement.setAttribute('data-theme', 'dark');
        localStorage.setItem('theme', 'dark');
    }
    else { document.documentElement.setAttribute('data-theme', 'light');
          localStorage.setItem('theme', 'light');
    }    
}

toggleSwitch.addEventListener('change', switchTheme, false);
</script>

That's all.
Tiny tweaks to make you a whole lot happier.

[murcs]

hej @brazzerstop.  thank you for this great tutorial.  ober!schöne grüße, m.

[crazycells]

@brazzerstop thanks for sharing!