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HTML

CSS

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HTML

              
                <div class="container">
		<h1>some title</h1>
		<p>
			Lorem ipsum dolor sit amet, consectetur adipisicing elit. Officia neque sint dolorum perferendis voluptatum in, voluptates enim itaque odit assumenda sequi, explicabo nesciunt. Maiores quisquam nam voluptate quo culpa! Voluptatibus enim soluta veniam asperiores fugit, pariatur accusantium voluptatem cum eius, praesentium omnis blanditiis, vel molestiae qui quo provident nemo repellendus earum sed ducimus expedita aliquam deleniti. Iusto eligendi a ullam nemo reprehenderit, voluptatibus, necessitatibus facilis dolor facere incidunt nostrum cumque, illum deleniti sed? Vitae sapiente magnam deleniti distinctio iure saepe aspernatur, labore inventore optio vel dolore. Rerum voluptatum eligendi fugiat consequuntur officia quas modi non ducimus accusantium repellat aut cum reprehenderit blanditiis ad commodi quaerat tenetur veniam praesentium dolores at ipsa sit amet, maxime. Numquam, dolor. Veniam animi dicta minima amet, eius fugit, sunt at asperiores possimus neque modi unde optio accusamus a porro eos reiciendis omnis qui illum repellat similique excepturi. Quam temporibus molestiae harum ut fugiat, eum dolorem dolore alias tempora, esse! Quibusdam distinctio, iste quos animi est commodi consequatur ab in, consectetur maxime laudantium. Sint necessitatibus accusamus dolor pariatur. Eum quidem, labore beatae velit, doloremque animi illum quos aspernatur dignissimos quisquam doloribus! Ab unde vel dolores enim? Quod excepturi, dolor repudiandae molestiae quos facilis alias veritatis dolorem harum inventore, vero consequatur tempore autem iusto, optio possimus quaerat.
		</p>
		<div class="theme">
			<p>Change the theme:</p>
			<a href="#" class="button button--dark button-theme" data-theme="dark">Dark</a>
			<a href="#" class="button button--light button-theme" data-theme="light">Light</a>
		</div>
	</div>
              
            
!

CSS

              
                :root{
	--main-color: #ecdcdc;
	--text-color: #2d2a2a;
}

*{
	box-sizing: border-box;
}

.container{
	width: 80vw;
	margin: auto;
	height: 100vh;
}

body{
	margin: 0;
	font-family: Arial;
	background: var(--main-color);
	color: var(--text-color);
}

h1{
	text-transform: uppercase;
}


.button{
	display: inline-block;
	margin: 0 5px;
	text-decoration: none;
	padding: 10px 20px;
	border-radius: 20px;
}

.button--dark{
	background-color: #000;
	color: #FFF;
}

.button--light{
	background-color: #FFF;
	color: #000;
}
              
            
!

JS

              
                const root = document.documentElement;
const buttonTheme = document.querySelectorAll('.button-theme');

console.log(buttonTheme);

buttonTheme.forEach((button) => {
  button.addEventListener('click', changeTheme)
})

function changeTheme(e){
	switch(this.dataset.theme){
		case 'dark': 
	    root.style.setProperty('--main-color', '#000')
	    root.style.setProperty('--text-color', '#FFF')
	    break
	    case 'light': 
	    root.style.setProperty('--main-color', '#ecdcdc')
	    root.style.setProperty('--text-color', '#2d2a2a')
	    break
	}
}
              
            
!
999px

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