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class DarkModeToggle extends HTMLElement { |
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connectedCallback() { |
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this.attachShadow({ mode: 'open' }); |
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this.shadowRoot.innerHTML = ` |
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<style> |
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.toggle-container { |
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display: flex; |
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align-items: center; |
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} |
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.toggle-switch { |
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position: relative; |
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display: inline-block; |
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width: 60px; |
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height: 30px; |
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margin: 0 10px; |
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} |
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.toggle-switch input { |
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opacity: 0; |
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width: 0; |
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height: 0; |
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} |
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.slider { |
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position: absolute; |
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cursor: pointer; |
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top: 0; |
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left: 0; |
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right: 0; |
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bottom: 0; |
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background-color: #4a5568; |
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transition: .4s; |
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border-radius: 34px; |
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} |
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.slider:before { |
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position: absolute; |
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content: ""; |
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height: 22px; |
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width: 22px; |
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left: 4px; |
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bottom: 4px; |
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background-color: white; |
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transition: .4s; |
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border-radius: 50%; |
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} |
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input:checked + .slider { |
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background-color: #8b5cf6; |
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} |
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input:checked + .slider:before { |
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transform: translateX(30px); |
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} |
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.icon { |
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font-size: 1.2rem; |
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} |
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</style> |
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<div class="toggle-container"> |
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<span class="icon">π</span> |
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<label class="toggle-switch"> |
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<input type="checkbox"> |
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<span class="slider"></span> |
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</label> |
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<span class="icon">π</span> |
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</div> |
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`; |
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const toggle = this.shadowRoot.querySelector('input'); |
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toggle.addEventListener('change', this.toggleDarkMode.bind(this)); |
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if (localStorage.getItem('darkMode') === 'true' || |
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(!localStorage.getItem('darkMode') && window.matchMedia('(prefers-color-scheme: dark)').matches)) { |
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toggle.checked = true; |
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document.documentElement.classList.add('dark'); |
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} |
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} |
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toggleDarkMode() { |
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const isDark = this.shadowRoot.querySelector('input').checked; |
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document.documentElement.classList.toggle('dark', isDark); |
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localStorage.setItem('darkMode', isDark); |
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} |
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} |
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customElements.define('darkmode-toggle', DarkModeToggle); |