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JavaScript

Matthias Nörr
Matthias Nörr
8,614 Points
Posted by Matthias Nörr
Matthias Nörr
8,614 Points

Overlay of Lightbox not showing. Images are just added after the body (Course: jQuery Basics, Simple Lightbox)

When an image in the gallery is clicked, no overlay is shown. Instead, the image is shown below the body of the page.

Javascript:

var $overlay = $('<div class="overlay"></div>');
var $image = $("<img>");

$("body").append($overlay);
$overlay.append($image);

$(".container_1 a").click(function(event){
    event.preventDefault();                         //Prevent Default Click Behaviour
    var imageLocation = $(this).attr("href");       //
    $image.attr("src", imageLocation);

    $overlay.show();                                //Show Overlay on Click
});

$overlay.click(function() {                         //Hide Overlay on Click
    $overlay.hide();    
});

CSS:

.overlay {
    background: rgba(0,0,0,0.7);
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 1;
    top: 0;
    left: 0;
    display: none;
    text-align: center;
}
Joel Bardsley
Joel Bardsley
31,246 Points
Joel Bardsley
Joel Bardsley
31,246 Points

Hi Matthias,

Everything looked fine to me, so I created a CodePen using your code (and a few placeholder images) to make sure it was working properly, which as you can see it is.

All I can suggest is making sure jQuery has been loaded properly from your HTML file, or ensuring there's nothing else using a z-index property in your css that might be preventing the overlay from appearing on top.

2 Answers

Matthias Nörr
Matthias Nörr
8,614 Points
Matthias Nörr
Matthias Nörr
8,614 Points

Thanks Joel. This allowed me to rule out some causes for the problem.

I solved my problem. Here is the solution:

Append the overlay to the html-tag and not to the body-tag

$("html").append($overlay);

and not 

$("body").append($overlay);
Matthias Nörr
Matthias Nörr
8,614 Points
Matthias Nörr
Matthias Nörr
8,614 Points

Joel Bardsley The lightbox overlay stops at the screen. When I scroll down in the browser, the overlay does not cover all of the screen but stops. Do you know how I can fix this?