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Add dark theme support #28

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Add dark theme support #28

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18 changes: 18 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,16 @@
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>TaskForge — open-source task tracker</title>
<script>
(() => {
const storedTheme = window.localStorage.getItem("taskforge.theme");
const systemDark = window.matchMedia?.(
"(prefers-color-scheme: dark)",
).matches;
const theme = storedTheme || (systemDark ? "dark" : "light");
document.documentElement.dataset.theme = theme;
})();
</script>
<link rel="stylesheet" href="styles.css" />
</head>
<body>
Expand All @@ -13,6 +23,14 @@ <h1>TaskForge</h1>
<p class="tagline">A tiny task list that lives in your browser.</p>
</div>
<div class="auth-panel" aria-live="polite">
<button
id="theme-toggle"
class="theme-toggle"
type="button"
aria-label="Switch to dark theme"
>
Dark
</button>
<img id="auth-avatar" class="auth-avatar" hidden />
<span id="auth-status" class="auth-status">
Tasks are stored on this device.
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3 changes: 3 additions & 0 deletions src/app.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ import {
} from "./auth.js";
import { load, loadLocal, save } from "./storage.js";
import { createTask, toggleTask, removeTask } from "./tasks.js";
import { initTheme } from "./theme.js";

const form = document.getElementById("task-form");
const input = document.getElementById("task-input");
Expand All @@ -15,11 +16,13 @@ const authStatus = document.getElementById("auth-status");
const authAction = document.getElementById("auth-action");
const authAvatar = document.getElementById("auth-avatar");
const authMessage = document.getElementById("auth-message");
const themeToggle = document.getElementById("theme-toggle");

let tasks = [];
let user = null;

async function init() {
initTheme(themeToggle);
const localTasks = loadLocal();
let completedSignIn = false;
try {
Expand Down
38 changes: 38 additions & 0 deletions src/theme.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
const THEME_KEY = "taskforge.theme";
const DARK_QUERY = "(prefers-color-scheme: dark)";

export function initTheme(toggleButton) {
const mediaQuery = window.matchMedia?.(DARK_QUERY);

applyTheme(getPreferredTheme(mediaQuery), toggleButton);

toggleButton?.addEventListener("click", () => {
const nextTheme = currentTheme() === "dark" ? "light" : "dark";
window.localStorage.setItem(THEME_KEY, nextTheme);
applyTheme(nextTheme, toggleButton);
});

mediaQuery?.addEventListener("change", (event) => {
if (window.localStorage.getItem(THEME_KEY)) return;
applyTheme(event.matches ? "dark" : "light", toggleButton);
});
}

function getPreferredTheme(mediaQuery) {
const storedTheme = window.localStorage.getItem(THEME_KEY);
if (storedTheme === "dark" || storedTheme === "light") return storedTheme;
return mediaQuery?.matches ? "dark" : "light";
}

function currentTheme() {
return document.documentElement.dataset.theme === "dark" ? "dark" : "light";
}

function applyTheme(theme, toggleButton) {
document.documentElement.dataset.theme = theme;
if (!toggleButton) return;

const nextTheme = theme === "dark" ? "light" : "dark";
toggleButton.textContent = nextTheme === "dark" ? "Dark" : "Light";
toggleButton.setAttribute("aria-label", `Switch to ${nextTheme} theme`);
}
47 changes: 42 additions & 5 deletions styles.css
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,29 @@
--accent: #0969da;
--accent-fg: #ffffff;
--done: #8c959f;
--message-bg: #fff8c5;
--message-border: #d4a72c;
--message-fg: #7d4e00;
--danger: #cf222e;
--danger-bg: rgba(207, 34, 46, 0.08);
--radius: 6px;
color-scheme: light;
}

:root[data-theme="dark"] {
--bg: #0d1117;
--fg: #e6edf3;
--muted: #8b949e;
--border: #30363d;
--accent: #2f81f7;
--accent-fg: #ffffff;
--done: #6e7681;
--message-bg: #332701;
--message-border: #9e6a03;
--message-fg: #f0c36a;
--danger: #ff7b72;
--danger-bg: rgba(248, 81, 73, 0.14);
color-scheme: dark;
}

* {
Expand Down Expand Up @@ -80,6 +102,21 @@ body {
opacity: 0.7;
}

.theme-toggle {
flex: 0 0 auto;
padding: 0.45rem 0.75rem;
font: inherit;
color: var(--fg);
background: var(--bg);
border: 1px solid var(--border);
border-radius: var(--radius);
cursor: pointer;
}

.theme-toggle:hover {
border-color: var(--accent);
}

.app-main {
max-width: 36rem;
margin: 0 auto;
Expand All @@ -89,9 +126,9 @@ body {
.auth-message {
margin: 0 0 1rem;
padding: 0.6rem 0.75rem;
color: #7d4e00;
background: #fff8c5;
border: 1px solid #d4a72c;
color: var(--message-fg);
background: var(--message-bg);
border: 1px solid var(--message-border);
border-radius: var(--radius);
}

Expand Down Expand Up @@ -171,8 +208,8 @@ body {
}

.task-delete:hover {
color: #cf222e;
background: rgba(207, 34, 46, 0.08);
color: var(--danger);
background: var(--danger-bg);
}

.empty-state {
Expand Down