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annotate mrjunejune/src/index.js @ 109:1c446ab6f945

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[MrJuneJune] New Blog about writing Seobeo library.
author June Park <parkjune1995@gmail.com>
date Sat, 03 Jan 2026 19:37:51 -0800
parents bcc76a156aea
children
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June Park <parkjune1995@gmail.com>
parents: 80
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1 const THEME_STORAGE_KEY = 'theme-preference';
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2 // Get stored preference or detect system preference
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3 function getThemePreference()
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4 {
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5 const stored = localStorage.getItem(THEME_STORAGE_KEY);
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6 if (stored) {
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7 return stored;
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8 }
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9 return 'auto';
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10 }
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11
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12 function applyTheme(preference)
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13 {
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14 const root = document.documentElement;
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15
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16 if (preference === 'light') {
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17 root.classList.remove('dark', 'auto');
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18 root.classList.add('light-mode');
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19 } else if (preference === 'dark') {
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20 root.classList.remove('light-mode', 'auto');
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21 root.classList.add('dark');
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22 } else {
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23 // Auto - remove manual overrides and let CSS media query handle it
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24 root.classList.remove('light-mode', 'dark');
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25 root.classList.add('auto');
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26 }
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27 }
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28
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29 (function() {
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30 const currentPreference = getThemePreference();
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31 applyTheme(currentPreference);
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32 })();
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33
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34 /* Toggle lights auto and dark */
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35 const toggle = document.querySelector('#themeToggle');
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36 toggle.addEventListener('click', function() {
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37 let preference = getThemePreference();
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38
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39 // Cycle through: auto -> light -> dark -> auto
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40 if (preference === 'auto') {
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41 preference = 'light';
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42 } else if (preference === 'light') {
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43 preference = 'dark';
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44 } else {
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45 preference = 'auto';
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46 }
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47
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48 localStorage.setItem(THEME_STORAGE_KEY, preference);
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49 applyTheme(preference);
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50 });