See the Pen <a href="https://codepen.io/Ayush-Kumar-Gupta/pen/ByBRPKN"> Theme Toggle Switch</a> by Ayush Kumar Gupta (<a href="https://codepen.io/Ayush-Kumar-Gupta">@Ayush-Kumar-Gupta</a>) on <a href="https://codepen.io">CodePen</a>.