JAVASCRIPT

fadein fadeout jquery

	$('.btn-cart').click(function(e) {
		e.preventDefault();
		$('.cartlist').fadeIn().addClass('active');
	});

	$('.btn-cartlist-close').click(function() {
		$('.cartlist').removeClass('active').fadeOut();
	});

css fadeout animation

#fadeout{
  opacity: 0;
  transition: opacity 2s linear;
}

#fadein{
  opacity: 1;
  transition: opacity 2s linear;
}

javascript fadein fadeout

#slideSource {
  opacity: 1;
  transition: opacity 1s; 
}

#slideSource.fade {
  opacity: 0;
}

fade in and fadeout animation

.elementToFadeInAndOut {
    width:200px;
    height: 200px;
    background: red;
    -webkit-animation: fadeinout 4s linear forwards;
    animation: fadeinout 4s linear forwards;
}

@-webkit-keyframes fadeinout {
  0%,100% { opacity: 0; }
  50% { opacity: 1; }
}

@keyframes fadeinout {
  0%,100% { opacity: 0; }
  50% { opacity: 1; }
}

JavaScript Element fade out

/*@lang css

#target {
    height: 100px;
    background-color: red;
    transition: opacity 1s;
}

*/

const target = document.getElementById("target");

target.addEventListener('click', () => target.style.opacity = '0');
// If you want to remove it from the page after the fadeout
target.addEventListener('transitionend', () => target.remove());

vanilla js fade in fade out

event.target.style.transition = '0.8s';
event.target.style.opacity = 0;

javascript fadein fadeout

var slideSource = document.getElementById('slideSource');

document.getElementById('handle').onclick = function () {
  slideSource.classList.toggle('fade');
}

js fadeout

const target = document.getElementById("target");

target.addEventListener('click', () => target.style.opacity = '0');
// If you want to remove it from the page after the fadeout
target.addEventListener('transitionend', () => target.remove());

javascript fadein fadeout

<button id="handle">Fade</button> 
<div id="slideSource">Whatever you want here - images or text</div>
 Run code snippet