The opacity behavior of jQuery seems to behave strangely on IE10

Within my project, the left side of the content is contained within a div called ".container", and there's a preloader located in an element with the ID "#preloader."

Across all major browsers, the functionality works smoothly as intended - when all content has finished loading, the page fades in. However, when viewing in Internet Explorer (IE), I encounter two issues. Firstly, the container does not have any opacity at the beginning, and secondly, the #preloader is removed only after the page content has fully loaded.

Here is the CSS style for the container:

.container{
    height: 100%;
    filter:alpha(opacity=0);
    -moz-opacity:0;
    -khtml-opacity: 0;
    opacity: 0;

    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
    filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
}

Additionally, here are the JavaScript functions:

function init_on_load(){
    $("#preloader").remove();
    $(".container").animate({opacity: 1}, {duration: 1000});
}

$(window).on("load",
    function(){
        init_on_load();
    }
);

I would appreciate your insights on this issue. Do you have any ideas on what might be causing these problems? Thank you.

Answer №1

Instead of attempting to manipulate opacity for IE, use jQuery to hide the div and then fade it in. This method ensures that your CSS won't interfere with any jQuery styles.

CSS:

.container {
    height: 100%;
    visibility: hidden;
}

JS:

(function($) {
  function init_on_load(){
      $("#preloader").remove();
      $(".container").css('visibility', 'visible').fadeTo(1000, 1);
  }

  $(document).ready(function() {
    $('.container').fadeTo(0, 0);
  });

  $(window).load(function() {
    init_on_load();  
  });

})(jQuery);

Answer №2

  /* CSS for IE 8 */
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
  /* CSS for IE 5-7 */
  filter: alpha(opacity=50);

I encountered a similar issue with IE 7, which was caused by a trailing comma after the opacity property.

$(".container").animate({'opacity': 1}, 1000);

The correct format should be:

jQuery(".container").animate({opacity: 1.00}, 1000);

Alternatively,
To resolve this, try setting the opacity to zero before animating it:

$(".container").css({ opacity: 0.0 }).animate( {opacity: 1}, 1000);

Another approach is to handle opacity in older versions of IE by animating the filter property:

var val = 1;
$(".container").animate({
    'opacity': 1,
    '-ms-filter': 'progid:DXImageTransform.Microsoft.Alpha(opacity='+val+')',
    filter: 'alpha(opacity=' + (val * 100) + ')'
}, 1000);

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