Curious about the new way YouTube is loading pages

Question

I\'ve noticed when I\'m watching a video and I click on the logo or a related video that a red progress bar (above the logo) dashes across the screen. At the same time there

Answer 1

looking at this demo, maybe could help you, and look at the comments, some say nice while some say too complicate to achieve it

html:

css:

#progress {
    position: fixed;
    z-index: 2147483647;
    top: 0;
    left: -6px;
    width: 1%;
    height: 2px;
    background: #0088CC;
    -moz-border-radius: 1px;
    -webkit-border-radius: 1px;
    border-radius: 1px;
    -moz-transition: width 500ms ease-out,opacity 400ms linear;
    -ms-transition: width 500ms ease-out,opacity 400ms linear;
    -o-transition: width 500ms ease-out,opacity 400ms linear;
    -webkit-transition: width 500ms ease-out,opacity 400ms linear;
    transition: width 500ms ease-out,opacity 400ms linear;
}


#progress dd, #progress dt {
    position: absolute;
    top: 0;
    height: 2px;
    -moz-box-shadow: #0088CC 1px 0 6px 1px;
    -ms-box-shadow: #0088CC 1px 0 6px 1px;
    -webkit-box-shadow: #0088CC 1px 0 6px 1px;
    box-shadow: #0088CC 1px 0 6px 1px;
    -moz-border-radius: 100%;
    -webkit-border-radius: 100%;
    border-radius: 100%;
}

#progress dt {
    opacity: .6;
    width: 180px;
    right: -80px;
    clip: rect(-6px,90px,14px,-6px);
}

#progress dd {
    opacity: .6;
    width: 20px;
    right: 0;
    clip: rect(-6px,22px,14px,10px);
}  

js:

$(document).ajaxStart(function() {
//only add progress bar if added yet.
  if ($("#progress").length === 0) {
    $("body").append($("
").attr("id", "progress"));
    $("#progress").width((50 + Math.random() * 30) + "%");
  }
});

$(document).ajaxComplete(function() {
//End loading animation
    $("#progress").width("101%").delay(200).fadeOut(400, function() {
      $(this).remove();
    });
});