i need help my stuff isn't working i'm not sure why. It's a scroll function that moves a navigation bar 20 px down if the window isn't at the top of document. And its supposed to move back 20px once the window is scrolled to the top.
<script type="text/javascript">
$(window).scroll(function(){
if( $(window).scrollTop() == $(document).height()- $(window).height() ){
$('#nav_space').animate({top:'20px'},200);
}
else {
$('#nav_space').animate({top:'-3px'},200);
}
});
</script>
<div id="nav_space">
<div id="nav_symbol">
</div>
<div id="nav_name">
<h3>Ascension</h3>
<span style="position: absolute; left: 19px; top: 39px;">Entertainment</span>
</div>
You can simplify using scrollTop(). Change your javascript to this instead:
$(window).scroll(function(){
if( $(window).scrollTop() > 0){
$('#nav_space').animate({top:'20px'},200);
}
else {
$('#nav_space').animate({top:'-3px'},200);
}
});
Related
I have a navigation header (normal HTML header tag).
I want to fade it out when a user scrolls down, but show it when the user stops scrolling (after a 1 second delay).
How can I achieve this with using jQuery? This is what I have got so far:
jQuery(function($){
var lastScrollTop = 0, delta = 15;
$(window).scroll(function(event){
var st = $(this).scrollTop();
if(Math.abs(lastScrollTop - st) <= delta)
return;
if ((st > lastScrollTop) && (lastScrollTop>0)) {
// downscroll code
$("header").css("top","-80px");
} else {
// upscroll code
$("header").css("top","32px");
}
lastScrollTop = st;
});
});
This might help you, try to implement this example in your code:
In this example, we are setting up the scroll event, so every time user perform the scroll operation following action is taken:
Fade out the header.
Clear the Time out, if it is set in the t var.
Set the timeout for 1 second, action taken after this timeout is to fade in the header again.
So, every time if one scroll point moved, event get called, header fade out and we setting a timout to display header after 1 second, but before that if another scroll point move, event again get called. and previous timer get cleared.
This goes on n on until, user stop scrolling and then last time out function execute successfully and fade in the header again.
$(function(){
var t;
document.addEventListener('scroll',function(e){
$("#Header").fadeOut(500);
clearTimeout(t);
checkScroll();
});
function checkScroll(){
t = setTimeout(function(){
$("#Header").fadeIn(500);
},1000); /* You can increase or reduse timer */
}
});
html, body { height: 1200px; margin: 0; padding: 0; width: 100%; }
#Header { background: red; height: 100px; left: 0; position: fixed; top: 0; width: 100%; }
#Header table { height: 100%; width: 100%; }
#Body { background: grey; height: 200%; margin-top: 100px; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="Header">
<table>
<tr>
<th>H E A D E R bar</th>
</tr>
</table>
</div>
<div id="Body">
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
<br/>
</div>
In your code, rather than using fading effect, position of header is changed, so when the position of the header is change to hide it, set the timer to bring it back, in this way you show the header when scrolling stops.
$(function(){
var lastScrollTop = 0, delta = 15;
var t;
$(window).scroll(function(event){
var st = $(this).scrollTop();
if(Math.abs(lastScrollTop - st) <= delta)
return;
if ((st > lastScrollTop) && (lastScrollTop>0)) {
// downscroll code
$("header").css("top","-80px");
clearTimeout(t);
checkScroll();
}
lastScrollTop = st;
});
function checkScroll(){
t = setTimeout(function(){
$("header").css("top","0px");
},1000); /* You can increase or reduse timer */
}
});
I ended up with the following code:
jQuery(function($){
var lastScrollTop = 0, delta = 15;
$(window).scroll(function(event){
var st = $(this).scrollTop();
if(Math.abs(lastScrollTop - st) <= delta)
return;
if ((st > lastScrollTop) && (lastScrollTop>0)) {
// downscroll code
$("header").css("top","-80px");
} else {
// upscroll code
$("header").css("top","32px");
}
lastScrollTop = st;
});
});
Codepen: https://codepen.io/Canvasandcode/pen/bGGeWrj
I have logo1 in the header changing to logo2 when user scrolls down. However, I don't want the logos to instantly switch but rather the first logo gradually fade out as the second logo fades in. I have added .fadeIn(slow) and .fadeOut(slow) in various places in my js but it's had no effect. Hoping I can get some help with this.
I've updated my question with more code. I've had 2 answers but can't get either to work for me and no more responses. Hoping an edited question with more detail will get a bit more attention.
<header>
<div id="nav" class="navbar">
<div id="nav_left">
HOME
SERVICES
PORTFOLIO
</div>
<a href="index.html" id="logo" class="Claire_logo">
<img src="images/logo_6_small.png" alt="logo2" id="logo_Claire" class="logo_main"
style="display:none" />
<img src="images/logo_bluebird_90_cc.png" alt="logo1" id="logo_Claire_blue" class="logo" />
</a>
<div id="nav_right">
BLOG
ABOUT
GET IN TOUCH
</div>
</div>
</header>
$(document).ready(function() {
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll > 0) {
$(".navbar").addClass("navbar-scroll");
$(".logo").show();
} else {
$(".navbar").removeClass("navbar-scroll");
$(".logo").hide();
}
if (scroll > 120) {
// $(".navbar").addClass("nav-color");
$(".logo_main").show();
$(".logo").hide();
} else {
// $(".navbar").removeClass("nav-color");
$(".logo_main").hide();
$(".logo").show();
}
});
});
You can do that using jQuery replaceWith
$(document).ready(function() {
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll > 0) {
$('#oldlogo').fadeOut(500, function() {
$('#oldlogo').replaceWith('<div id="newlogo"><img src="newlogo" alt="newlogo"/></div>').fadeIn(500);
});
}
});
});
body {
height: 200vh
}
header {
height: 50px;
position: fixed;
top: 0;
width: 100%;
background: white;
}
#nav {
display: flex;
justify-content: center;
flex-direction: row;
height: 180px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header>
<div id="nav" class="navbar">
<div id="oldlogo"> <img src="oldlogooldlogo" alt="oldlogo" /></div>
</div>
</header>
I edited my answer. I missed the error in your code. I commented below in codes. You can use both fadeIn & fadeOut or show & hide methods as well. But for fadeing effect using fadeIn & fadeOut maybe looks better than show & hide
$(document).ready(function() {
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= 0 && scroll <= 120) { // I missed this logic mistake for the first time.
$(".navbar").addClass("navbar-scroll");
$(".logo").fadeIn(300); // or show(300)
} else {
$(".navbar").removeClass("navbar-scroll");
$(".logo").fadeOut(0); // or hide()
}
if (scroll > 120) {
// $(".navbar").addClass("nav-color");
$(".logo_main").fadeIn(300);
$(".logo").fadeOut(0);
} else {
// $(".navbar").removeClass("nav-color");
$(".logo_main").fadeOut(0);
$(".logo").fadeIn(300);
}
});
});
Long time ago I found somewhere (on stackoverflow I think) code to scroll one window height per scroll. I tried many libraries but that script works just like I want. But it's jumpy when scrolling during animation. So I disable scroll during animation but it works only in Firefox.
I made a fiddle: https://jsfiddle.net/msoys5gc/1/
if( $(window).scrollTop() < $(window).height() * 6 ) {
window.onwheel = function(){ return false; };
}
$('html,body').stop().animate({
scrollTop: divs.eq(div).offset().top
}, 600, function() {
window.onwheel = function(){ return true; };
});
I don`t understand this:
if( $(window).scrollTop() < $(window).height() * 6 )
this will be true until you pass the six slide...
UPDATED: If you want to stop triggering the animation while it is running you can just delete the stop(). Then if you don't want to enqueue animations(and then get strange behaviors), you can just call clearQueue() when the animation has finished.
var divs = $('.section');
var dir = 'up'; // wheel scroll direction
var div = 0; // current div
$(document.body).on('DOMMouseScroll mousewheel', function (e) {
if (e.originalEvent.detail > 0 || e.originalEvent.wheelDelta < 0) {
dir = 'down';
}
else {
dir = 'up';
}
// find currently visible div :
div = -1;
divs.each(function(i){
if (div<0 && ($(this).offset().top >= $(window).scrollTop())) {
div = i;
}
});
if (dir == 'up' && div > 0) {
div--;
}
if (dir == 'down' && div < divs.length) {
div++;
}
$('html,body').animate({
scrollTop: divs.eq(div).offset().top
}, 1600, function() {
$('html,body').clearQueue();
});
return false;
});
$(window).resize(function () {
$('html,body').scrollTop(divs.eq(div).offset().top);
});
.section {
height: 100vh;
}
body{
margin: 0px !important;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="section" style="background: yellow;"></div>
<div class="section" style="background: green;"></div>
<div class="section" style="background: blue;"></div>
<div class="section" style="background: red;"></div>
<div class="section" style="background: violet;"></div>
<div class="section" style="background: orange;"></div>
<div class="section" style="background: black;"></div>
I am trying to get the scroll down and up position at This Demo but as you can see it is updating the <p> element on every single pixel by pixel scroll (Up or Down). But what I need to only update the <p> on every 200 scroll until reaching the end of the div (right now the p element is updating on every single scroll).
Here is the code I have:
$(window).scroll(function () {
var height = $(window).scrollTop();
if (height > 200) {
$('p').html(height);
}
});
div {
height:1080px;
}
p {
position:fixed;
top:0;
left:0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<p></p>
<div>
<h3> Hello Scroll!</h3>
</div>
How can I fix this?
var a=0;
$(window).scroll(function () {
var height = $(window).scrollTop();
if (height-a<200){
if (height-a<-200){
$('p').html(a);
a = parseInt(height/100) *100;
}
}else{
$('p').html(a);
a = parseInt(height/100)*100;
}
});
div {
height:1080px;
}
p {
position:fixed;
top:0;
left:0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<p></p>
<div>
<h3> Hello Scroll!</h3>
</div>
I have this HTML code
HTML
<div id="d1"></div>
<div id="d2"></div>
<div id="d3"></div>
<div id="d4"></div>
<div id="d5"></div>
and this CSS code
CSS
#d1, #d2, #d3, #d4, #d5{ float:left; height:500px; width:200px; display:none;}
Script:
<script>
$(document).ready(function() {
$(window).scroll(function() {
if ($("#d2").height() <= ($(window).height() + $(window).scrollTop())) {
$("#d1").css("display","block");
}else {
$("#d1").css("display","none");
}
});
});
</script>
Question:
When I scroll page down each div display one by one.
When scroller reach at "#d2" the div "#d1" should be displayed, When scroller reach at "#d3" div "#d2" should be displayed.... and when scroller reach at the end of page "#d5" should be displayed.
You may try this similar case:
http://jsfiddle.net/j7r27/
$(window).scroll(function() {
$("div").each( function() {
if( $(window).scrollTop() > $(this).offset().top - 100 ) {
$(this).css('opacity',1);
} else {
$(this).css('opacity',0);
}
});
});