Trying to make multiple background images cycle through a slideshow with CSS and JQUERY

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-上瘾入骨i
-上瘾入骨i 2020-11-28 16:14

I\'ve placed three background images in a div. I\'m trying to make all three of them cycle through on a timer that fades in and out. I\'ve actually found similar quesitons o

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  •  南方客
    南方客 (楼主)
    2020-11-28 16:47

    Try creating array from css background-image value , fading in , fading out first background image ; removing faded out background image from array , placing removed background image at last index of array ; resetting background image value to array joined by comma; fading in , fading out next , now first indexed background image ; cycling through fading in , fading out all background images ; recursively calling function , to attempt to create displayed effect of an "infinite" fade in , fade out "slideshow"

    $(function() {
      // set `$.fx.interval` at `0`
      $.fx.interval = 0;
      (function cycleBgImage(elem, bgimg) {
    // `elem`:`#slideshow`
    // set, reset, delay to `1000` after background image reset
    elem.css("backgroundImage", bgimg)
      // fade in background image
      .fadeTo(3000, 1, "linear", function() {
        // set `delay` before fadeing out image
        // fade in background image        
        $(this).delay(3000, "fx").fadeTo(3000, 0, "linear", function() {
          // split background image string at comma , creating array
          var img = $(this).css("backgroundImage").split(","),
            // concat first background image to `img` array,
            // remove first background image from `img` array
            bgimg = img.concat(img[0]).splice(1).join(",");
          // recursively call `cycleBgImage`
          cycleBgImage(elem, bgimg);
        });
      });
      }($("#slideshow")));
    });
    body {
      width: 400px;
      height: 400px;
    }
    /* set `#slideshow` parent background color */
    .slideshow {
      background: #000;
      display:block;
      width:inherit;
      height:inherit;
    }
    #slideshow {
      width: 100%;
      height: 100%;
      display: block;
      opacity: 0.0;
      background-color: #000;
      /* 
         set background images as `url(/path/to/image)` here, 
         separated by commas 
      */
      background-image: url("http://lorempixel.com/400/400/cats/?1"), 
        url("http://lorempixel.com/400/400/animals/?2"), 
        url("http://lorempixel.com/400/400/nature/?3"), 
        url("http://lorempixel.com/400/400/technics/?4"), 
        url("http://lorempixel.com/400/400/city/?5");
      background-size: cover, 0px, 0px, 0px;
    /* set transtitions at 3000ms 
      -webkit-transition: background-image 3000ms linear;
      -moz-transition: background-image 3000ms linear;
      -ms-transition: background-image 3000ms linear;
      -o-transition: background-image 3000ms linear;
      transition: background-image 3000ms linear;
        */
    }
    
    

    jsfiddle http://jsfiddle.net/gkjL6mdj/15/

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