As a beginner, I am currently working on a photo viewer project using JavaScript and jQuery.
My main issue arises when clicking on the arrow to view the next picture. I want the current picture to fade out smoothly before the new one fades in. However, there was a problem where the old picture would still be visible during the fade-in transition if the new image took longer to load. This led me to the conclusion that I need to ensure the fade-in effect only begins once the new picture has fully loaded.
I have come up with a sequence of actions that should run consecutively, with each step triggered only after the previous one has completed:
$('#image').fadeOut(500);
getImage();
$('#image').fadeIn(500);
Here is the function responsible for fetching the new image:
getImage = function() {
document.getElementById("image").src = "Images/Image" + counter + ".jpg";
}
In this code, 'counter' is a variable previously declared and updated every time the user clicks on the 'next' button or equivalent.
Considering my limited programming knowledge, I am seeking a solution to ensure that:
$('#image').fadeIn(500);
Is not executed until the new image has been successfully retrieved. Otherwise, what happens is that the old image begins fading in before being replaced by the new one.
I attempted to use a callback like this:
$('#image').fadeOut(500, function() {
getImage();
});
$('#image').fadeIn(500);
However, this approach did not work as intended since it requires nested fallbacks, which I am unsure how to implement.
Another strategy I tried involved checking the status of image loading:
var hasloaded = $('#image').fadeOut(500, function() {
getImage();
});
if (hasloaded)
{$('#image').fadeIn(500);}
Unfortunately, this clever workaround also proved unsuccessful in solving the issue at hand.
I would greatly appreciate any guidance or assistance in resolving this dilemma.
Thank you.