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Add theme toggle. #143

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Add theme toggle. #143

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22 changes: 22 additions & 0 deletions static/js/base.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
// From https://albertoroura.com/building-a-theme-switcher-for-bootstrap/

function setTheme (mode = 'auto') {
const userMode = localStorage.getItem('bs-theme');
const sysMode = window.matchMedia('(prefers-color-scheme: light)').matches;
const useSystem = mode === 'system' || (!userMode && mode === 'auto');
const modeChosen = useSystem ? 'system' : mode === 'dark' || mode === 'light' ? mode : userMode;

if (useSystem) {
localStorage.removeItem('bs-theme');
} else {
localStorage.setItem('bs-theme', modeChosen);
}

document.documentElement.setAttribute('data-bs-theme', useSystem ? (sysMode ? 'light' : 'dark') : modeChosen);
document.querySelectorAll('.mode-switch .btn').forEach(e => e.classList.remove('text-body'));
document.getElementById(modeChosen).classList.add('text-body');
}

setTheme();
document.querySelectorAll('.mode-switch .btn').forEach(e => e.addEventListener('click', () => setTheme(e.id)));
window.matchMedia('(prefers-color-scheme: light)').addEventListener('change', () => setTheme());
11 changes: 9 additions & 2 deletions templates/_base.html
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
{% load static %}
<!DOCTYPE html>
<html lang="en">
<html lang="en" data-bs-theme="auto">

<head>
<meta charset="utf-8">
Expand All @@ -15,6 +15,7 @@
<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
<link href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.min.css" rel="stylesheet">

<link rel="stylesheet" href="{% static 'css/base.css' %}">
{% endblock %}
Expand Down Expand Up @@ -56,7 +57,13 @@
</li>
</ul>
</div>
{% else %}
{% endif %}
<div class="mode-switch me-3">
<button id="dark" class="btn p-0 m-1" title="Dark mode."><i class="bi bi-lightbulb-fill"></i></button>
<button id="light" class="btn p-0 m-1" title="Light mode."><i class="bi bi-lightbulb"></i></button>
<button id="system" class="btn p-0 m-1" title="System preferred mode."><i class="bi bi-sliders"></i></button>
</div>
{% if not user.is_authenticated %}
<div class="mr-auto">
<form class="form d-flex">
<a href="{% url 'account_login' %}" class="btn btn-outline-secondary">Log in</a>
Expand Down