Recently, I encountered an issue with changing a 3x3 image gallery layout to an image slider when the screen size was less than 768px (mobile). Thanks to the help of everyone and particularly Danilo, who provided solutions in the comments, I was able to identify that my CSS wasn't properly targeting the screen. I realized I needed @media only screen and had also overlooked a DIV, which was a rookie mistake on my part.
If you're facing a similar challenge of switching content display from a desktop layout to a mobile layout in Bootstrap 4, you can utilize CSS media queries targeting the wrapped DIV for displaying or hiding elements accordingly.
Check out the updated working snippet below:
@media only screen and (min-width: 768px) {
.slider {
display: none;
}
.block {
display: block;
}
}
@media only screen and (max-width: 768px) {
.slider {
display: block;
}
.block {
display: none;
}
}
.hold-tests {
display: flex;
width: 100%;
}
.col {
flex: 1;
} <!--- Start of Gallery Section -->
<div id="hold-tests">
<div class="col slider">
<div id="sliderIndicators" class="carousel slide carousel-fade z-depth-1-half" data-ride="carousel" data-interval="9000">
<div class="carousel-inner col-" role="listbox">
<!--- First Slide -->
<div class="carousel-item active">
<img src="Img/PHportrait.png" alt="background image">
</div>
<div class="carousel-item">
<img src="Img/PHportrait2.png" alt="background image">
</div>
<div class="carousel-item">
<img src="Img/PHportrait.png" alt="background image">
</div>
</div>
<div class="narrow">
<div class="col-12">
<p class="lead text-center">Want to see more of my work?</p>
<!-- add in social media icons and add target="_blank" to open in new tab -->
</div>
</div>
</div>
</div>
<div class="col block">
<div id="gallery" class="offset">
<div class="col-md">
<div class="row no-padding">
<div class="col-md-4">
<div class="gallery-card">
<a href="Img/PHportrait.png" target="_blank">
<img src="Img/PHportrait.png" class="img-fluid" alt="Gallery Picture">
</a>
</div>
</div>
<div class="col-md-4">
<div class="gallery-card">
<a href="Img/PHportrait.png" target="_blank">
<img src="Img/PHportrait.png" class="img-fluid" alt="Gallery Picture">
</a>
</div>
</div>
<div class="col-md-4">
<div class="gallery-card">
<a href="Img/PHportrait.png" target="_blank">
<img src="Img/PHportrait.png" class="img-fluid" alt="Gallery Picture">
</a>
</div>
</div>
<div class="col-md-4">
<div class="gallery-card">
<a href="Img/PHportrait.png" target="_blank">
<img src="Img/PHportrait.png" class="img-fluid" alt="Gallery Picture">
</a>
</div>
</div>
<div class="col-md-4">
<div class="gallery-card">
<a href="Img/PHportrait.png" target="_blank">
<img src="Img/PHportrait.png" class="img-fluid" alt="Gallery Picture">
</a>
</div>
</div>
<div class="col-md-4">
<div class="gallery-card">
<a href="Img/PHportrait.png" target="_blank">
<img src="Img/PHportrait.png" class="img-fluid" alt="Gallery Picture">
</a>
</div>
</div>
</div>
</div>
<div class="narrow">
<div class="col-12">
<p class="lead text-center">Want to see more of my work?</p>
<!-- add in social media icons and add target="_blank" to open in new tab -->
</div>
</div>
</div>
</div>
</div>
<!--- End of Gallery Section -->