a thoughtful use of digital
All browsers have this limitation: they not allow to show an svg with an external image embedded, such as
<image x="2" y="2" width="somewidth" height="someheight" xlink:href="myimage.jpg">even though the image is in local.
For security reasons.
We managed to add an image map to the on-click expansible image.
This is the code:
<style type="text/css">
img[usemap] { zoom: 12%;}
img[usemap]:focus {zoom: 50%;}
</style>
<map name="mymap">
<area shape="rect" coords="1294,253,1420,434" title="mount" />
<area shape="rect" coords="1709,296,1835,477" title="tree" />
</map>
<img tabindex="0" src="path-to/myimage" usemap="#mymap" />
The problem is that to close the expansed image you must click either on a map area or outside the image.
We were looking for the simplest possible solution to enlarge an image on click, without javascript and with the least amount of code possible.
At first we found the pseudo-class focus as a solution: with this css code img:focus and in html (inside the img tag) tabindex="0".
In this way, the image expanded on click, but to make it return to the initial size, it was necessary to click outside the enlarged image. As in the following example:
Therefore we had to add other code, so that we could return to the original, small, size, clicking inside the image. We had to use the input tag.
This is the result:
This is the code:
<style type="text/css">
input:checked + label > img {max-width: 200px; transform:scale(1.0); left: 0px;}
input {display: none;}
img {
max-width: 200px;
transition: all 1s;
transition:transform 0.25s ease;
}
img:focus {
max-width: none;
transform:scale(2.8);
position: relative;
left: 5%;
outline:0;
}
</style>
<p>This the result:</p>
<input type="checkbox" checked id="myimage" />
<label for="myimage">
<img tabindex="0" src="path-to-my-image/myimage.jpg" width="200px" />
</label>We speak about this new feature in another article.
The child element of a flexbox may not obey to the css property min-height. Therefore you should use this code in the parent element: min-height: 100vh.
Otherwise the child element, f.e. the main div of a web page with few content, could end before the end of the page, in an inelegant way.
The width of a child element as well may not work as expected (and as it would do without flex). Therefore you should explicitly state the width of a child element within a flexbox.
Otherwise a web page (with few text, i.g.) could have a width considerably narrower that expected.
It is quite easy automatically alternate a (image) banner in a webpage with javascript. But if you want alternate automatically a complex text it is not so easy.
First of all you have to know that is not possible use php, because the “duty” of php ends with the “production” of a page, and it is not usable to change something in a page alrealdy “made”.
Therefore, the only way is javascript. I found a js to change automatically images (every x time) and I modified it according to my needs.
var slideIndex = 0;
showSlides();
function showSlides() {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
for (i = 0; i < slides.length; i++) { slides[i].style.display = "none"; } slideIndex++; if (slideIndex > slides.length) {slideIndex = 1}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
// slides[slideIndex-1].style.display = "block";
// slides[slideIndex-1].className = slides[i].className.replace(" visible", "");
slides[slideIndex-1].style.display = "flex";
dots[slideIndex-1].className += " active";
setTimeout(showSlides, 4000); // Change image every 4 seconds
}
Afterward I was able to use, within the html proposed a php code, as in the following
$ads_verticale_dx="<code><p class=\"mySlides fade\"><span class=\"numbertext\">1 / 3</span><img src=\"someimage.jpg\" width=\"100px\" /><br />some <b>text</b> with<br /> <a rel=\"external\" href=\"somelink/\">some link</a></p>
<p class=\"mySlides fade\"><span class=\"numbertext\">2 / 3</span><img src=\"someotherimage.jpg\" width=\"100px\" /><br />some other <b>text</b> with a<br />
<a rel=\"external\" href=\"somelink/\">some other link</a></p>
<div style=\"text-align:center\"><span class=\"dot\"></span><span class=\"dot\"></span><span class=\"dot\"></span></div>
And this is the css to add
.mySlides {display: none;
}
/* Slideshow container */
.slideshow-container { vertical-align: middle;
}
/* Caption text */
.text {
display: none;
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
width: 100%;
text-align: center;
}
/* Number text (1/3 etc) */
.numbertext {
visibility: hidden;
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
top: 0;
}
/* The dots/bullets/indicators */
.dot {
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: none;
transition: background-color 0.6s ease;
}
.active {
background-color: #717171;
}
/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.text {font-size: 11px}
}Last problem: how load the javascript. You can put it within the body, and this way it works without proiblems, but is a quite ugly solution. The best way is tu put the script within the head, or in a linked js file with all the other scripts, and then do (wihin the body tag) the command onLoad=”showSlides();”. But doing so, some browser, such as Chrome, could not understand the command. To fix this issue, be sure to use the correct case (onLoad, not onload) and try to delete the browser cache. This way you should force Chrome to recognize the script.
It works!
In my website I have three (main) divs: the actually main one and two small laterals ads divs (at left and at right of the main one). I noticed that the lateral divs weren’t at the middle of the free (lateral) space, in big screens.
1. The solution was use the flexbox, with this code in the parent div:
display:flex; justify-content: space-around; 2. But a problem was the fact that these divs have a position:fixed propriety, that is incompatible with flex.
Therfore I was suggested to use position:sticky instead of position:fixed, and it worked.
3.A last problem was that after this change, clicking anything in my page there was a sort od “dance” of all the element within the window. This was solved creating a parent div of my three (main) divs, so that not body, but this new div is the parent.
There is this simple, but very helpful page on the Internet, where you can immediately see the result of flexbox settings: https://flexbox.help/
You can use a javascript, like this
<script type="text/javascript">
// img[style]').each(function(){
$el = $(this);
var style = $el.attr('style');
$el.attr('style','');
$el.parent().attr('style',style);
}); //Moves the inline styles
$("img").each(function(){
var title = this.alt;
$(this).after(''+ title +'');
}); //Adds the dynamic captions.
});
//]]>
</script>
It is a very serious problem: there are very good free hosting, but unfortunately without a free https service.
You can add this row, before “foreach()”, if the variable $yourvariable is not always present
if (is_array($yourvariable) || is_object($yourvariable))Further info here.