Add the DarkModeSwitcher component.

2025-06-02 22:02:38 +03:00
parent 3bc4616c5d
commit aded500cab
7 changed files with 113 additions and 2 deletions
@@ -10,6 +10,14 @@
    <link phx-track-static rel="stylesheet" href={~p"/assets/app.css"} />
    <script defer phx-track-static type="text/javascript" src={~p"/assets/app.js"}>
    </script>
+    <script>
+      // On page load or when changing themes, best to add inline in `head` to avoid FOUC
+      if (localStorage.getItem('color-theme') === 'dark' || (!('color-theme' in localStorage) && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
+        document.documentElement.classList.add('dark');
+      } else {
+        document.documentElement.classList.remove('dark')
+      }
+    </script>
  </head>
  <body class="bg-white dark:bg-gray-900">
    {@inner_content}
@@ -34,6 +34,8 @@ defmodule DecentralisedBookIndexWeb.Components.MyComponents do

      alias MyComponents.SelectAuthorAlias
      import MyComponents.SelectedAuthorAlias, only: [selected_author_alias: 1]
+
+      import MyComponents.DarkModeSwitcher, only: [dark_mode_switcher: 1]
    end
  end
 end
@@ -0,0 +1,56 @@
+defmodule DecentralisedBookIndexWeb.Components.MyComponents.DarkModeSwitcher do
+  use Phoenix.Component
+
+  @doc"""
+  This component is based on https://github.com/aiwaiwa/phoenix_dark_mode/blob/main/dark_mode.ex.
+  """
+  def dark_mode_switcher(assigns) do
+    ~H"""
+    <button
+      id="theme-toggle"
+      type="button"
+      phx-update="ignore"
+      phx-hook="DarkThemeToggle"
+      class="text-zinc-500 dark:text-zinc-400 hover:bg-slate-200 dark:hover:bg-gray-700 rounded-lg text-sm p-2"
+    >
+      <svg
+        id="theme-toggle-dark-icon"
+        class="w-5 h-5 text-transparent hidden"
+        fill="currentColor"
+        viewBox="0 0 20 20"
+        xmlns="http://www.w3.org/2000/svg"
+      >
+        <path d="M17.293 13.293A8 8 0 016.707 2.707a8.001 8.001 0 1010.586 10.586z"></path>
+      </svg>
+
+      <svg
+        id="theme-toggle-light-icon"
+        class="w-5 h-5 text-transparent"
+        fill="currentColor"
+        viewBox="0 0 20 20"
+        xmlns="http://www.w3.org/2000/svg"
+      >
+        <path
+          d="M10 2a1 1 0 011 1v1a1 1 0 11-2 0V3a1 1 0 011-1zm4 8a4 4 0 11-8 0 4 4 0 018 0zm-.464 4.95l.707.707a1 1 0 001.414-1.414l-.707-.707a1 1 0 00-1.414 1.414zm2.12-10.607a1 1 0 010 1.414l-.706.707a1 1 0 11-1.414-1.414l.707-.707a1 1 0 011.414 0zM17 11a1 1 0 100-2h-1a1 1 0 100 2h1zm-7 4a1 1 0 011 1v1a1 1 0 11-2 0v-1a1 1 0 011-1zM5.05 6.464A1 1 0 106.465 5.05l-.708-.707a1 1 0 00-1.414 1.414l.707.707zm1.414 8.486l-.707.707a1 1 0 01-1.414-1.414l.707-.707a1 1 0 011.414 1.414zM4 11a1 1 0 100-2H3a1 1 0 000 2h1z"
+          fill-rule="evenodd"
+          clip-rule="evenodd"
+        >
+        </path>
+      </svg>
+    </button>
+
+    <script>
+      // Toggle early based on <html class="dark">
+      const themeToggleDarkIcon = document.getElementById('theme-toggle-dark-icon');
+      const themeToggleLightIcon = document.getElementById('theme-toggle-light-icon');
+      if (themeToggleDarkIcon != null && themeToggleLightIcon != null) {
+        let dark = document.documentElement.classList.contains('dark');
+        const show = dark ? themeToggleDarkIcon : themeToggleLightIcon
+        const hide = dark ? themeToggleLightIcon : themeToggleDarkIcon
+        show.classList.remove('hidden', 'text-transparent');
+        hide.classList.add('hidden', 'text-transparent');
+      }
+    </script>
+    """
+  end
+end
@@ -2,7 +2,8 @@ defmodule DecentralisedBookIndexWeb.Components.MyPartials.Navbar do
  use Phoenix.Component
  use DecentralisedBookIndexWeb, :verified_routes

-  import DecentralisedBookIndexWeb.Components.MyComponents.Buttons
+  import DecentralisedBookIndexWeb.Components.MyComponents.{Buttons, DarkModeSwitcher}
+
  alias Phoenix.LiveView.JS
  alias DecentralisedBookIndex.Accounts.Role

@@ -35,6 +36,7 @@ defmodule DecentralisedBookIndexWeb.Components.MyPartials.Navbar do
          <span class="self-center text-xl font-semibold whitespace-nowrap dark:text-white">DBI</span>
        </.link>
        <div class="flex items-center lg:order-2">
+	  <.dark_mode_switcher />
          <.user_info current_user={@current_user} />
          <button
            data-collapse-toggle="mobile-menu-2"