miguelmald miguelmald - 5 months ago 19
CSS Question

Slideshow picture disapears

I have a CSS + Javascripts slideshow, taken from the W3Schools website example.

This is the code, adapted to my web aplication (almost the same):



$(document).ready(function() {
var slideIndex = 1;

function showSlides(n) {
var slides = $(".mySlides");
var i;

if (n > slides.length) {
slideIndex = 1;
}

if (n < 1) {
slideIndex = slides.length;
}

for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}

slides[slideIndex - 1].style.display = "block";
}

function plusSlides(n) {
showSlides(slideIndex += n);
}

showSlides(slideIndex);

$(".prev").click(function() {
plusSlides(-1);
});

$(".next").click(function() {
plusSlides(1);
});

});

@-webkit-keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
@keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
.slideshow-container {
position: relative;
margin: auto;
}
.prev,
.next {
cursor: pointer;
position: absolute;
top: 0;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 1.6s ease;
border-radius: 0 3px 3px 0;
}
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="slideshow-container">
<div class="mySlides fade">
<div class="numbertext">1 / 3</div>
<img class="img-responsive" src="pic1.jpg" alt='Entrada'>
<div class="text">1</div>
</div>

<div class="mySlides fade">
<div class="numbertext">2 / 3</div>
<img class="img-responsive" src="pic2.jpg">
<div class="text">2</div>
</div>

<div class="mySlides fade">
<div class="numbertext">3 / 3</div>
<img class="img-responsive" src="pic3.jpg">
<div class="text">3</div>
</div>

<a class="prev">&#10094;</a>
<a class="next">&#10095;</a>
</div>





The page loads correctly, but the pictures disapear after a second or so.

How can I fix it?

Answer

I've had the same issue a while back. I've solved it by adding animation-fill-mode: forwards;.

Usually, animation runs and stops, then goes back to the origional style.

With animation-fill-mode you can change that behaviour. forwards will keep the result of the animation alive after the animation.

See the bottom of the CSS snippet for the implementation.

$(document).ready(function() {
  var slideIndex = 1;

  function showSlides(n) {
    var slides = $(".mySlides");
    var i;

    if (n > slides.length) {
      slideIndex = 1;
    }

    if (n < 1) {
      slideIndex = slides.length;
    }

    for (i = 0; i < slides.length; i++) {
      slides[i].style.display = "none";
    }

    slides[slideIndex - 1].style.display = "block";
  }

  function plusSlides(n) {
    showSlides(slideIndex += n);
  }

  showSlides(slideIndex);

  $(".prev").click(function() {
    plusSlides(-1);
  });

  $(".next").click(function() {
    plusSlides(1);
  });

});
@-webkit-keyframes fade {
  from {
    opacity: .4
  }
  to {
    opacity: 1
  }
}
@keyframes fade {
  from {
    opacity: .4
  }
  to {
    opacity: 1
  }
}
.slideshow-container {
  position: relative;
  margin: auto;
}
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 0;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 1.6s ease;
  border-radius: 0 3px 3px 0;
}
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}
.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  -webkit-animation-fill-mode: forwards; 
  animation-name: fade;
  animation-duration: 1.5s;
  animation-fill-mode: forwards; 
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="slideshow-container">
  <div class="mySlides fade">
    <div class="numbertext">1 / 3</div>
    <img class="img-responsive" src="http://placehold.it/350x150" alt='Entrada'>
    <div class="text">1</div>
  </div>

  <div class="mySlides fade">
    <div class="numbertext">2 / 3</div>
    <img class="img-responsive" src="http://placehold.it/350x150">
    <div class="text">2</div>
  </div>

  <div class="mySlides fade">
    <div class="numbertext">3 / 3</div>
    <img class="img-responsive" src="http://placehold.it/350x150">
    <div class="text">3</div>
  </div>

  <a class="prev">&#10094;</a>
  <a class="next">&#10095;</a>
</div>

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