jQuery Scroll to top fade in/out issue

Question 1

Xavier’s Question:

This code has two parts:

The first one is supposed to fade in the .toTop button when the user scrolls down and keep it hide otherwise.

The second part is supposed to bring the user top when clicking on it.

Part two isn’t working when mixed with part one. I can’t find the conflict between the two.

<script>
    $(document).ready(function(){

        $(".toTop").hide();

        $(function () {
            $(window).scroll(function () {
                if ($(this).scrollTop() > 300) {
                    $('.toTop').fadeIn();
                } else {
                    $('.toTop').fadeOut();
                }
            });        
        });        
    });

        var easing, e, pos;
    $(function(){
      $(".toTop").on("click", function(){
        pos= $(window).scrollTop();
        $("body").css({
          "margin-top": -pos+"px",
          "overflow-y": "scroll", 
        });
        $(window).scrollTop(0);
        $("body").css("transition", "all 1s ease");
        $("body").css("margin-top", "0");
        $("body").on("webkitTransitionEnd transitionend msTransitionEnd oTransitionEnd", function(){
          $("body").css("transition", "none");
        });
      });
    });      
</script>

Answer

MG_Bautista

Use this…

$(document).ready(function(){

        $(".toTop").hide();

        $(function () {
            $(window).scroll(function () {
                if ($(this).scrollTop() > 200) {
                    $('.toTop').fadeIn();
                } else {
                    $('.toTop').fadeOut();
                }
            });        
        });        
    });

var easing, e, pos;
    $(function(){
      $(".toTop").on("click", function(){
        pos= $(window).scrollTop();
        $("body").css({
          "margin-top": -pos+"px",
          "overflow-y": "scroll", 
        });
        $(window).scrollTop(0);
        $("body").css("transition", "all 1s ease");
        $("body").css("margin-top", "0");
        $("body").on("webkitTransitionEnd transitionend msTransitionEnd oTransitionEnd", function(){
          $("body").css("transition", "none");
        });
      });
    });

And dee this DEMO

Answer

Starx

First point is that, you have used to many .ready() event handler. Remove all the redundancies:

$(document).ready(function(){

  $(".toTop").hide();

  $(window).scroll(function () {
      if ($(this).scrollTop() > 300) {
           $('.toTop').fadeIn();
      } else {
           $('.toTop').fadeOut();
      }
  });        

  var easing, e, pos;
  $(".toTop").on("click", function(){
    pos = $(window).scrollTop();
    $("body").css({
      "margin-top": -pos+"px",
      "overflow-y": "scroll", 
    });
    $(window).scrollTop(0);

    $("body").css("transition", "all 1s ease");
    $("body").css("margin-top", "0");
    $("body").on("webkitTransitionEnd transitionend msTransitionEnd oTransitionEnd", function(){
      $("body").css("transition", "none");
    });
  });

});

Question 2

Question by Sandro Antonucci

Sandro Antonucci

I have a DIV which shows one image at once coming from an ajax script, the images are all different in height and are showed with fadeIn/fadeOut (just for the tag)

How can I allow to resize the DIV (that contains the img tag of course) “sliding” based on the new content before the images that fadein changes the DIV height very rudely? 😛

Thanks

Answer

Answer by Starx

Starx

Well do Something like this

$(".change").click(function() {
  $(".mydiv").fadeOut('slow');
  $(".myimg").attr("src",'');    
  $(".myimg").attr("src","linktonewimage.jpg");
  var newheight = $(".myimg").height();    
  $(".mydiv").css("height",newheight+"px");
  $(".mydiv").fadeIn('slow');
});

I am assuming you have a <img> tag with myimg class inside a div with mydiv class.

Check the DEMO HERE

Tag: fade

jQuery Scroll to top fade in/out issue

Xavier’s Question:

resize DIV matching the new content with jquery

Question by Sandro Antonucci

Answer by Starx

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