File size: 2,264 Bytes
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class DarkModeToggle extends HTMLElement {
connectedCallback() {
this.attachShadow({ mode: 'open' });
this.shadowRoot.innerHTML = `
<style>
.toggle-container {
display: flex;
align-items: center;
}
.toggle-switch {
position: relative;
display: inline-block;
width: 60px;
height: 30px;
margin: 0 10px;
}
.toggle-switch input {
opacity: 0;
width: 0;
height: 0;
}
.slider {
position: absolute;
cursor: pointer;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: #4a5568;
transition: .4s;
border-radius: 34px;
}
.slider:before {
position: absolute;
content: "";
height: 22px;
width: 22px;
left: 4px;
bottom: 4px;
background-color: white;
transition: .4s;
border-radius: 50%;
}
input:checked + .slider {
background-color: #8b5cf6;
}
input:checked + .slider:before {
transform: translateX(30px);
}
.icon {
font-size: 1.2rem;
}
</style>
<div class="toggle-container">
<span class="icon">🌞</span>
<label class="toggle-switch">
<input type="checkbox">
<span class="slider"></span>
</label>
<span class="icon">🌜</span>
</div>
`;
const toggle = this.shadowRoot.querySelector('input');
toggle.addEventListener('change', this.toggleDarkMode.bind(this));
// Check for saved preference or system preference
if (localStorage.getItem('darkMode') === 'true' ||
(!localStorage.getItem('darkMode') && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
toggle.checked = true;
document.documentElement.classList.add('dark');
}
}
toggleDarkMode() {
const isDark = this.shadowRoot.querySelector('input').checked;
document.documentElement.classList.toggle('dark', isDark);
localStorage.setItem('darkMode', isDark);
}
}
customElements.define('darkmode-toggle', DarkModeToggle); |