Develop Reference

Show logo if site has scrolled

I have a header with a logo. This logo should appear only if the site has been scrolled.
I tried this in javascript:
if(document.getElementById("div").scrollTop != 0){
document.write("<img src='logo.jpg'>");
}
But this did not work.
How to achieve it?

Use window.addEventListener('scroll', callback) and then set the value "block" to the img's property.
window.addEventListener('scroll', function(e) {
if (document.getElementsByTagName("html")[0].scrollTop > 5) {
document.getElementsByClassName('imgHeader')[0].style.display = "block";
} else {
document.getElementsByClassName('imgHeader')[0].style.display = "none";
}
});
.imgHeader {
height: 100px;
width: 100px;
display: none;
}
div {
height: 1000px;
}
header {
position: fixed;
top: 0;
width: 100%;
}
<header><img class="imgHeader" src="https://material.angular.io/assets/img/examples/shiba1.jpg" /></header>
<div></div>

Try this one
$(document).on("scroll", function() {
if ($(document).scrollTop() > 5) {
$(".below-top-header").addClass("show-class");
} else {
$(".below-top-header").removeClass("show-class");
}
});
.content {
height: 500px;
}
.show-class {
position: fixed;
display: block !important;
}
.hide-class {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="content">
<div class="below-top-header hide-class">
Image
</div>
</div>

Unfortunately, I think you must use some JavaScript to make it work like you want.
Here is an easy snippet to show the principle I used:
Start with the logo already in the html, but with display: none in its CSS,
Use window.addEventListener('scroll', callback) to change display: none to display: block when the page is scrolled down (i.e. document.documentElement.scrollTop > 0).
var logo = document.getElementById('logo');
window.addEventListener('scroll', function(e) {
if (document.documentElement.scrollTop > 0) {
logo.style.display = 'block';
}else logo.style.display = 'none';
});
#logo {
display: none;
position: fixed;
top: 0;
background: #aaa;
}
#page {
background: #ddd;
height: 2000px;
}
<div id='logo'><img src='http://placekitten.com/200/50'></div>
<div id='page'>Start of page<br>Try to scroll down</div>
Hope it helps.

You need to add an scrollListener to the window in order to execute code when the user scrolls.
Your code only gets executed on page load.
Informations on Eventlisteners: https://developer.mozilla.org/de/docs/Web/API/EventTarget/addEventListener
window.addEventListener('scroll', function(e) {
//do something as soon as the window was scrolled
});
Be aware that the event will be triggered each time the user scrolls.

click button to reactivate autohidden-div not working, fiddle Jquery

I want a panel to show up for five seconds after a button is clicked....
Then if the user click on the panel (uses it...) the panel continues showing up,otherwise it hides for inactivation.
So the panel can increase its lifespan if the user uses it (click or hover on it)...otherwise it just fadeOut
What am I doing wrong?
I tried to use clearTimeout but it ends up in a wierd behaviour snippet. I tried reseting with booleans the code but as well...I couldnt make it work the way is expected
let ShowPanel = 0;
$('.ShowPanel5Seconds').on("click", function() {
ShowPanel = 1;
$(".Panel").show();
setTimeout(function() {
$(".Panel").fadeOut();
}, 5000)
});
//clicking hoverin on the panel
$('.Panel,.container').on("click", function(event) {
if (1 == ShowPanel) {
$('.ShowPanel5Seconds').trigger("click");
}
});
.container{
position:relative;
width:300px;
height:300px;
border:1px solid blue;
margin:10px
}
.Panel {
display: none;
position:absolute;
top:10px;
left:10px;
background: red;
height: 100px;
width: 50px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<button class="ShowPanel5Seconds">Show Panel 5 seconds</button>
<div class="container">
<div class="Panel">I'm the panel...click me to continue living</div>
</div>

An alternative, that works as expected is to keep a timeout variable with the time left to display the div.
let timeleft = 0;
function hide_or_not() {
timeleft = timeleft - 1;
if (timeleft <= 0) {
$(".Panel").fadeOut();
}
setTimeout(hide_or_not, 1000);
}
$('.ShowPanel5Seconds').on("click", function() {
$(".Panel").show();
if (timeleft <= 0) {
timeleft = 5;
hide_or_not();
}
});
//clicking hoverin on the panel
$('.Panel').on("click", function(event) {
timeleft = timeleft + 1;
});
.Panel {
display: none;
background: red;
height: 100px;
width: 50px;
}
<scri
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<button class="ShowPanel5Seconds">Show Panel 5 seconds</button>
<div class="Panel">I'm the panel...click me to continue living</div>
Note: The code is made to be readable, not exactly optimal.

You are overcomplicating it. Just show/extend time in one go
let panel = $('.Panel'),
panelTimer;
function showAndExtendPanel(){
panel.stop(true,true).show();
clearTimeout(panelTimer);
panelTimer = setTimeout(killPanel, 5000)
}
function killPanel(){
panel.fadeOut();
}
$('.ShowPanel5Seconds, .Panel').on("click", showAndExtendPanel);
.Panel {
display: none;
background: red;
height: 100px;
width: 50px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<button class="ShowPanel5Seconds">Show Panel 5 seconds</button>
<div class="Panel">I'm the panel...click me to continue living</div>

You can control this by addClass, removeClass() and :not() selector
// on button click show/fadeOut the panel but not the panel with class hover
$('.ShowPanel5Seconds').on("click", function() {
$(".Panel:not(.hover)").show();
setTimeout(function() {
$(".Panel:not(.hover)").fadeOut();
}, 5000)
});
// when hover over the panel add class hover and remove it when unhover and trigger the button click
$('.Panel:not(.hover)').hover(function(event){
$(this).addClass('hover');
} , function(){
$(this).removeClass('hover');
$('.ShowPanel5Seconds').click();
});
.Panel {
display: none;
background: red;
height: 100px;
width: 50px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<button class="ShowPanel5Seconds">Show Panel 5 seconds</button>
<div class="Panel">I'm the panel...click me to continue living</div>

Toggling divs to slide at certain times

Please see this fiddle http://jsfiddle.net/rabelais/6bt70uhj/9/
$('#name-a').click(function() {
$('#bio-line-1').animate({width: 'toggle'});
window.setTimeout(function (){$('#bio-line-2').slideToggle( "slow" ); }, 300);
When clicking the link the first lines slides in from the left, and then when that is finished the second line slides in from the top. When it slides back to be hidden, the first line slides aways before the second line does.
How can I change it so the second line slides away before the first line slides away?

$('#name-a').click(function () {
if ($('#bio-line-1').css('display') == 'none') {
$('#bio-line-1').animate({ width: 'toggle' });
window.setTimeout(function () {
$('#bio-line-2').slideToggle("slow");
}, 300);
}
else {
$('#bio-line-2').slideToggle("slow");
window.setTimeout(function () {
$('#bio-line-1').animate({ width: 'toggle' });
}, 300);
}
});
DEMO

I think this is what you want:
$('#name-a').click(function () {
window.setTimeout(function () {
$('#bio-line-2').slideToggle("slow", function () {
$('#bio-line-1').animate({
width: 'toggle'
});
});
}, 300);
});
Demo: https://jsfiddle.net/tusharj/6bt70uhj/11/

I think you can do
var $l2 = $('#bio-line-2'),
$l1 = $('#bio-line-1');
var $a = $('#name-a').click(function() {
$a.toggleClass('visible');
var visible = $a.hasClass('visible'),
$f = visible ? $l1 : $l2,
$s = visible ? $l2 : $l1;
$f.animate({
width: 'toggle'
});
window.setTimeout(function() {
$s.slideToggle("slow");
}, 300);
});
#name-a {
left: 38px;
position: fixed;
top: 38px;
z-index: 1;
}
#bio-line-1 {
left: 150px;
position: fixed;
top: 35px;
width: 633px;
z-index: 1;
}
#bio-line-1 p {
color: #333333;
display: block;
float: right;
font-size: 16px;
line-height: 21px;
width: 552px;
}
#bio-line-2 {
left: 150px;
margin-top: 20px;
position: fixed;
top: 38px;
width: 633px;
z-index: 1;
}
#bio-line-2 p {
color: #333333;
display: block;
float: right;
font-size: 16px;
line-height: 21px;
width: 552px;
}
.hidden {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="name-a">
John Love
</div>
<div id="bio-line-1" class="hidden">
<p>holds a Master's Degree from the University of the Arts</p>
</div>
<div id="bio-line-2" class="hidden">
<p>London and currently works in London.</p>
</div>

$('#name-a').click(function() {
if($("#bio-line-2").is(":visible")){
window.setTimeout(function (){
$('#bio-line-1').animate({width: 'toggle'});
}, 300);
$('#bio-line-2').slideToggle( "slow" );
}
else{
window.setTimeout(function (){
$('#bio-line-2').slideToggle( "slow" );
}, 300);
$('#bio-line-1').animate({width: 'toggle'});
}
});

i have made some condition that while showing the lines, line number 1 will appear first and then line number 2 will appear. and while hiding lines, line number 2 will hide first and then line number 1 will hide... i think this is what you trying
Here is fiddle link
Thank You

I'd do something like this. I would also not use a setTimeout as it is not a reliable way to trigger consecutive animations. The timer can trigger at different times depending on what is happening in the UI thread and therefore ruining the effect you are trying to create. You should use the animate success callback of each animation in order to trigger the next one at the exact right time.
http://jsfiddle.net/6bt70uhj/23/
var $line1 = $('#bio-line-1'),
$line2 = $('#bio-line-2');
$('#name-a').click(function() {
if (!$line1.is(":visible")) {
$line1.animate({
width: 'toggle'
}, 300, function () {
$line2.slideToggle("slow");
});
} else {
$line2.slideToggle("slow", function() {
$line1.animate({
width: 'toggle'
});
});
}
});

Make div all content below move down if div slides down

I'm trying to make this notification div that slides down if it is active. It slides down using this script:
<script type="text/javascript">
$(document).ready(function(){
$('#notice').slideDown(1000);
$('.exit').click(function(){
$("#notice").slideUp(400);
});
});
</script>
And the style is:
#notice {
background: #E0E0E0;
color: #FFF;
padding-left: 30px;
padding-top: 20px;
padding-bottom: 20px;
padding-right: 30px;
position: absolute;
z-index: 999999;
width: calc(100% - 60px);
top: 0;
font-weight: 200;
letter-spacing: 1px;
text-align: center;
display: none;
}
But how can I make this move everything else down as it slides down, even though the div below is at state 'position: fixed'. And slide everything else back up when it is removed using the .exit link.

Here you are one option to do it
Example here http://jsfiddle.net/jvarj4gk/2/
$('#notice').slideDown(1000);
var timer = setInterval(function () {
$('#fixed').css({
top: $('#notice').outerHeight()
});
if ($('#notice').outerHeight() == $('#fixed').css('top')) {
clearInterval(timer);
}
}, 10);
$('.exit').click(function () {
$("#notice").slideUp(400, function(){
$(this).remove();
});
$('#fixed').animate({
top: 0
}, 400);
});
Update
To move the #body you can do it like this
Example http://jsfiddle.net/jvarj4gk/5/
$('#notice').slideDown(1000);
var timer = setInterval(function () {
$('#fixed, #body').css({
top: $('#notice').outerHeight()
});
if ($('#notice').outerHeight() == $('#fixed').css('top')) {
clearInterval(timer);
}
}, 10);
$('.exit').click(function () {
$("#notice").slideUp(400, function(){
$(this).remove();
});
$('#fixed').animate({
top: 0
}, 400);
});

You can animate() the div below
var h = '+=' + $('#notice').height();
$('#fixedDivId').animate({
top: h;
},1000);
And almost the same stuff for slide up but h='-='+ $('#notice').height();
UPD
For your code it will look like this
$(document).ready(function(){
var h = $('#notice').height()+'px';
$('#notice').slideDown({duration:1000, queue:false});
$('#fixedDivId').animate({
top: h
},{duration:1000, queue:false});
$('.exit').click(function(){
$("#notice").slideUp(400);
});
});
Fiddle

How to Animate (slide) content adjacent to content with jquery toggle()

I am setting up a page which the user can hide the side bar if they wish. I am trying to use the jqeuryui to do this with the following js code
// TOGGLE JS
$(function () {
function runEffect() {
var options = {};
$("#effect").toggle('slide', options, 500);
};
$("#button").click(function () {
runEffect();
return false;
});
});
I have this working in a JSFiddle here http://jsfiddle.net/jwg4U/
However, when you look at the JSFiddle you will notice that my main content area which is a DIV called #content does not animate, it just jumps into place when I toggle the sidebar.
I would like the content div to also slide into place seamlessly and follow the toggle as it if it attached to it.
I have looked at jquery animate, but not sure how to implement this with the slide?
A Second part I am struggling with is how to change the button text when the sidebar is closed to say "Show Sidebar" - Weather it is open or closed right now it just says "Hide Sidebar"
Looking for some help
Thanks

See this updated fiddle : http://jsfiddle.net/jwg4U/23/
HTML:
<div id="container" style="width:800px">
<div id="header">
<h1>HEADER</h1>
</div>
<div class="toggler">
<div id="effect" class="ui-widget-content ui-corner-all">
<div id="menu" style="background-color:#FFD700;height:300px;width:100px;float:left;">
<h3>SIDEBAR</h3>
</div>
</div>
<div id="content" style="background-color:#EEEEEE;height:300px;">Main Content goes here</div>
</div>
Hide Sidebar
<div id="footer" style="background-color:#FFA500;clear:both;text-align:center;">
FOOTER</div>
</div>
​
JS:
// TOGGLE JS
$(function() {
var i = 0;
function runEffect() {
var options = {};
if (i === 0) {
i = 1;
$(".toggler").animate({
left: -100
}, {
duration: 500
});
}
else {
i = 0;
$(".toggler").animate({
left: 0
}, {
duration: 500
});
}
}
$("#button").click(function() {
if (i === 0) {
$(this).html("Show Sidebar");
}
else {
$(this).html("Hide Sidebar");
}
runEffect();
return false;
});
});
// TABS JS
$(function() {
$("#tabs").tabs();
});​
CSS:
.toggler {
float: left;
position: relative;
}
#button {
padding: .5em 1em;
text-decoration: none;
}
#effect {
position: relative;
float: left;
}
#content{
position: relative;
float: left;
width: 500px;
}
#button{
float: left;
clear: both;
}
#header{
background-color: #000;
color: #FFF;
}​

The jsfiddle for the complete answer : http://jsfiddle.net/jwg4U/22/
$('#effect').animate({
width: 'toggle',
height: 'toggle'
}, {
duration: 500,
specialEasing: {
width: 'linear',
height: 'linear'
},
complete: function() {
$("#content").animate(
{ left: '+=100px' },
60,
'easeInQuad',
function ()
{
if(isOpen)
{
isOpen=false;
$("#button").html('Show Sidebar');
}
else
{
isOpen=true;
$("#button").html('Hide Sidebar');
}
});
}
});