Can I fade in a background image (CSS: background-image) with jQuery?
I have a div element with text in it and a background image, which is set via the CSS property background-image. Is it possible to fade in the background image via jQuery?
div {
background-repeat: no-repeat;
background-position: center;
background-size: contain;
background-image: url(http://upload.wikimedia.org/wikipedia/commons/8/84/Konqi_svg.svg);
border: 1px solid #666;
height: 10em;
}<div>Text</div>EDIT
I've made a fiddle exemplifying my scenario. Basically, this configures an initial background-image and a transition, and changes the background-image with jQuery. In my testing there is no animated transition between the two images.
EDIT2
My revised fiddle works!
i have been searching for ages and finally i put everything together to find my solution. Folks say, you cannot fade-in/-out the background-image- id of the html-background. Thats definitely wrong as you can figure out by implementing the below mentioned demo
CSS:
html, body
height: 100%; /* ges Hoehe der Seite -> weitere Hoehenangaben werden relativ hierzu ausgewertet */
overflow: hidden; /* hide scrollbars */
opacity: 1.0;
-webkit-transition: background 1.5s linear;
-moz-transition: background 1.5s linear;
-o-transition: background 1.5s linear;
-ms-transition: background 1.5s linear;
transition: background 1.5s linear;
Changing body's background-image can now easily be done using JavaScript:
switch (dummy)
case 1:
$(document.body).css({"background-image": "url("+URL_of_pic_One+")"});
waitAWhile();
case 2:
$(document.body).css({"background-image": "url("+URL_of_pic_Two+")"});
waitAWhile();
This is what worked for my, and its pure css
css
html {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
}
body {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
}
#bg {
width: 100%;
height: 100%;
background: url('/image.jpg/') no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
-webkit-animation: myfirst 5s ; /* Chrome, Safari, Opera */
animation: myfirst 5s ;
}
/* Chrome, Safari, Opera */
@-webkit-keyframes myfirst {
from {opacity: 0.2;}
to {opacity: 1;}
}
/* Standard syntax */
@keyframes myfirst {
from {opacity: 0.2;}
to {opacity: 1;}
}
html
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<div id="bg">
<!-- content here -->
</div> <!-- end bg -->
</body>
</html>
You can give opacity value as
div {opacity: 0.4;}
For IE, you can specify as
div { filter:alpha(opacity=10));}
Lower the value - Higher the transparency.
It's not possible to do it just like that, but you can overlay an opaque div between the div with the background-image and the text and fade that one out, hence giving the appearance that the background is fading in.
With modern browser i prefer a much lightweight approach with a bit of Js and CSS3...
transition: background 300ms ease-in 200ms;
Look at this demo:
http://codepen.io/nicolasbonnici/pen/gPVNbr
You can fade your background-image in various ways since Firefox 4 ...
Your CSS:
.box {
background: #CCCCCC;
-webkit-transition: background 0.5s linear;
-moz-transition: background 0.5s linear;
-o-transition: background 0.5s linear;
transition: background 0.5s linear;
}
.box:hover {
background: url(path/to/file.png) no-repeat #CCCCCC;
}
Your XHTML:
<div class="box">
Some Text …
</div>
And thats it.
jquery:
$("div").fadeTo(1000 , 1);
css
div {
background: url("../images/example.jpg") no-repeat center;
opacity:0;
Height:100%;
}
html
<div></div>
I know i'm late, but I found a way using jquery which works on every browser(i tested it on chrome, firefox and Ie 9)and th fore-ground elements are always displayed instead of css3 transition property.
create 2 absolute wrapper and using z-index.
First set the elements that have to be in the fore-ground with the highest z-index property value, and the other elemets(all included in the body, so: body{}) with a lower z-index property value than the fore-ground elements'one , at least of 2 number lower.
HTML part:
<div class="wrapper" id="wrapper1"></div>
<div class="wrapper" id="wrapper2"></div>
css part:
.fore-groundElements{ //select all fore-ground elements
z-index:0; //>=0
}
.wrapper{
background-size: cover;
width:100%;
height:100%;
background-size: 100% 100%;
position:absolute;
}
#wrapper1{
z-index:-1;
}
#wrapper2{
z-index:-2;
}
body{
height:100%;
width:100%;
margin:0px;
display:cover;
z-index:-3 //<=-3
}
than the javascript/jquery one:
i needed to change the background image every three second so i used a set timeout.
this is the code:
$(document).ready(main);
var main = function(){
var imgPath=[imagesPath1,..,...]; // the array in which store the image paths
var newWrapper; // the wrapper to display
var currentWrapper; //the current displayed wrapper which has to be faded
var l=2; // the next image index to be displayed, it is set to 2 because the first two position of the array(first two images) start already setted up
var imgNumber= imgPath.length; //to know when the images are over and restart the carousel
var currentImg; //the next image path to be displayed
$('#wrapper1').css("background-image", 'url'+imgPath[0]); //pre set the first wrapper background images
$('#wrapper2').css("background-image", 'url'+imgPath[1]); //pre set the first wrapper background images
setInterval(myfunction,3000); //refresh the background image every three seconds
function myfunction(){
if(l===imgNumber-1){ //restart the carousel if every single image has already been displayed
l=0;
};
if(l%2==0||l%2==2){ //set the wrapper that will be displaied after the fadeOut callback function
currentWrapper='#wrapper1';
newWrapper='#wrapper2';
}else{
currentWrapper='#wrapper2';
newWrapper='#wrapper1';
};
currentImg=imgPath[l];
$(currentWrapper).fadeOut(1000,function(){ //fade out the current wrapper, so now the back-ground wrapper is fully displayed
$(newWrapper).css("z-index", "-1"); //move the shown wrapper in the fore-ground
$(currentWrapper).css("z-index","-2"); //move the hidden wrapper in the back ground
$(currentWrapper).css("background-image",'url'+currentImg); // sets up the next image that is now shown in the actually hidden background wrapper
$(currentWrapper).show(); //shows the background wrapper, which is not visible yet, and it will be shown the next time the setInterval event will be triggered
l++; //set the next image index that will be set the next time the setInterval event will be triggered
});
}; //end of myFunction
} //end of main
i hope that my answer is clear,if you need more explanation comment it.
sorry for my english :)
ReferenceURL : https://stackoverflow.com/questions/7319552/can-i-fade-in-a-background-image-css-background-image-with-jquery
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