Develop Reference

Stop fixed element scrolling at certain point

I have fixed sidebar which should scroll along with main content and stop at certain point when I scroll down. And vise versa when I scroll up.
I wrote script which determines window height, scrollY position, position where sidebar should 'stop'. I stop sidebar by adding css 'bottom' property. But I have 2 problems with this approach:
When sidebar is close to 'pagination' where it should stop, it suddenly jumps down. When I scroll up it suddenly jumps up.
When I scroll page, sidebar moves all the time
Here's my code. HTML:
<div class="container">
<aside></aside>
<div class="content">
<div class="pagination"></div>
</div>
<footer></footer>
</div>
CSS:
aside {
display: flex;
position: fixed;
background-color: #fff;
border-radius: 4px;
transition: 0s;
transition: margin .2s, bottom .05s;
background: orange;
height: 350px;
width: 200px;
}
.content {
display: flex;
align-items: flex-end;
height: 1000px;
width: 100%;
background: green;
}
.pagination {
height: 100px;
width: 100%;
background: blue;
}
footer {
height: 500px;
width: 100%;
background: red;
}
JS:
let board = $('.pagination')[0].offsetTop;
let filterPanel = $('aside');
if (board <= window.innerHeight) {
filterPanel.css('position', 'static');
filterPanel.css('padding-right', '0');
}
$(document).on('scroll', function () {
let filterPanelBottom = filterPanel.offset().top + filterPanel.outerHeight(true);
let bottomDiff = board - filterPanelBottom;
if(filterPanel.css('position') != 'static') {
if (window.scrollY + window.innerHeight - (bottomDiff*2.6) >= board)
filterPanel.css('bottom', window.scrollY + window.innerHeight - board);
else
filterPanel.css('bottom', '');
}
});
Here's live demo on codepen
Side bar is marked with orange background and block where it should stop is marked with blue. Than you for your help in advance.

I solved my problem with solution described here
var windw = this;
let board = $('.pagination').offset().top;
let asideHeight = $('aside').outerHeight(true);
let coords = board - asideHeight;
console.log(coords)
$.fn.followTo = function ( pos ) {
var $this = this,
$window = $(windw);
$window.scroll(function(e){
if ($window.scrollTop() > pos) {
$this.css({
position: 'absolute',
top: pos
});
} else {
$this.css({
position: 'fixed',
top: 0
});
}
});
};
$('aside').followTo(coords);
And calculated coordinates as endpoint offset top - sidebar height. You can see solution in my codepen

Adding touchEvents for navigation

I'm building a little site with full page horizontal and vertical scrolling. Check out a codepen demo here. There is a bug with the demo, the 'left' and 'up' buttons don't work how they're supposed to. The 'right' and 'down' buttons work fine. I just threw that together to show you what I'm talking about (excuse my inline styling).
First off, I need to incorporate touchEvents to make the full page scrolling work on mobile devices. If the user swipes left, right, down, or up, the page should move accordingly. I'm still learning the fundamentals of JS and I have no idea where to start with that.
Secondly, I have a few doubts about whether or not I'm using best practices in my JS. For one thing, I repeat myself a lot. For another, I'm pretty sure there's a simpler method for what I'm trying to do. I'd appreciate it if you could take a look at my code and give me some suggestions. Thanks!

You need to modify these two in CSS:
#center.cslide-up {
top: 100vh;
}
#center.cslide-left {
left: 100vw;
}
First one: When the up button is clicked, it will move 100vh down from top position.
Second one: When the left button is clicked, it will move 100vw right from left position.
As far as for mobile phones, I'd suggest try using:
Hammer.js : https://hammerjs.github.io/
Or Refer this answer: https://stackoverflow.com/a/23230280/2474466
And you can reduce the lines of code by cooking up a function and calling it like this: (Make sure to declare panel2 variable globally)
btnL.addEventListener('click', function() {
swiper("left");
});
btnLBack.addEventListener('click', function() {
swiper("left");
});
function swiper(dir){
panelC.classList.toggle('cslide-'+dir);
if(dir=="up") panel2=panelU;
else if(dir=="right") panel2=panelR;
else if(dir=="left") panel2=panelL;
else if(dir=="down") panel2=panelD;
panel2.classList.toggle('slide-'+dir);
}
The function swiper takes a single argument dir which determines in which direction it has to be moved. And you can concatenate the dir with cslide- to move the center container. And use if/else conditions to determine which panel to move and use the same idea for it as well.
And to make it more simpler and a bit efficient, if you're not making use of any other eventlisteners for the buttons or panels and the only aim is to toggle the class around, you can just use inline onClick="swiper('direction');" attribute on the panels and buttons to trigger it only when needed instead of defining the eventlisteners in the script.
var panel2;
var panelC = document.getElementById('center');
var panelU = document.getElementById('up');
var panelR = document.getElementById('right');
var panelD = document.getElementById('down');
var panelL = document.getElementById('left');
var btnU = document.getElementById('btn-up');
var btnR = document.getElementById('btn-right');
var btnD = document.getElementById('btn-down');
var btnL = document.getElementById('btn-left');
var btnUBack = document.getElementById('btn-up-back');
var btnRBack = document.getElementById('btn-right-back');
var btnDBack = document.getElementById('btn-down-back');
var btnLBack = document.getElementById('btn-left-back');
btnU.addEventListener('click', function() {
swiper("up");
});
btnUBack.addEventListener('click', function() {
swiper("up");
});
btnR.addEventListener('click', function() {
swiper("right");
});
btnRBack.addEventListener('click', function() {
swiper("right");
});
btnD.addEventListener('click', function() {
swiper("down");
});
btnDBack.addEventListener('click', function() {
swiper("down");
});
btnL.addEventListener('click', function() {
swiper("left");
});
btnLBack.addEventListener('click', function() {
swiper("left");
});
function swiper(dir){
panelC.classList.toggle('cslide-'+dir);
if(dir=="up") panel2=panelU;
else if(dir=="right") panel2=panelR;
else if(dir=="left") panel2=panelL;
else if(dir=="down") panel2=panelD;
panel2.classList.toggle('slide-'+dir);
}
* {
margin: 0;
padding: 0;
transition: 1.5s ease;
-webkit-transition: 1.5s ease;
overflow: hidden;
background: white;
}
.panel {
width: 100vw;
height: 100vh;
display: block;
position: absolute;
border: 1px solid blue;
}
.btn {
position: absolute;
padding: 16px;
cursor: pointer;
}
#center {
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
}
#center.cslide-up {
top: 100vh;
}
#center.cslide-left {
left: 100vw;
}
#center.cslide-right {
left: -100vw;
}
#center.cslide-down {
top: -100vh;
}
#up {
top: -100vh;
}
#up.slide-up {
top: 0;
}
#right {
right: -100vw;
}
#right.slide-right {
right: 0;
}
#down {
bottom: -100vh;
}
#down.slide-down {
bottom: 0;
}
#left {
left: -100vw
}
#left.slide-left {
left: 0;
}
<div class="panel" id="center">
<div class="btn" id="btn-up" style="text-align: center; width: 100%;">
up
</div>
<div class="btn" id="btn-right" style="right: 0; top: 50%;">
right
</div>
<div class="btn" id="btn-down" style="text-align: center; bottom: 0; width: 100%;">
down
</div>
<div class="btn" id="btn-left" style="top: 50%;">
left
</div>
</div>
<div class="panel" id="up">
<div class="btn" id="btn-up-back" style="bottom: 0; width: 100%; text-align: center;">
back
</div>
</div>
<div class="panel" id="right">
<div class="btn" id="btn-right-back" style="left: 0; top: 50%;">
back
</div>
</div>
<div class="panel" id="down">
<div class="btn" id="btn-down-back" style="top: 0; width: 100%; text-align: center;">
back
</div>
</div>
<div class="panel" id="left">
<div class="btn" id="btn-left-back" style="right: 0; top: 50%;">
back
</div>
</div>

How do you create 3 adjustable divs?

What I want:
| A | | B | | C |
^ ^
When you move the handles left and right A, B, and C resize accordingly
| A | | B | | C |
What I have is the || between B and C sliding, but not resizing B and all I get on the other one is the resize cursor. Basically C is a curtain and covers A and B. I did get min size working for C.
| A | C |
I broke somebody else's perfectly good code to get this far:
var isResizing = false,
who='',
lastDownX = 0;
$(function () {
var container = $('#container'),
left = $('#left'),
right = $('#right'),
middle = $('#middle'),
hand2 = $('#hand2'),
handle = $('#handle');
handle.on('mousedown', function (e) {
isResizing = true;
who=e.target.id;
lastDownX = e.clientX;
});
$(document).on('mousemove', function (e) {
var temp, min;
// we don't want to do anything if we aren't resizing.
if (!isResizing)
return;
min=container.width() * 0.1;
temp = container.width() - (e.clientX - container.offset().left);
if (temp < min)
temp = min;
if (who == 'handle')
right.css('width', temp);
if (who == 'hand2')
left.css('width', temp);
}).on('mouseup', function (e) {
// stop resizing
isResizing = false;
});
});
body, html {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
#container {
width: 100%;
height: 100%;
/* Disable selection so it doesn't get annoying when dragging. */
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: moz-none;
-ms-user-select: none;
user-select: none;
}
#container #left {
width: 40%;
height: 100%;
float: left;
background: red;
}
#container #middle {
margin-left: 40%;
height: 100%;
background: green;
}
#container #right {
position: absolute;
right: 0;
top: 0;
bottom: 0;
width: 200px;
background: rgba(0, 0, 255, 0.90);
}
#container #handle {
position: absolute;
left: -4px;
top: 0;
bottom: 0;
width: 80px;
cursor: w-resize;
}
#container #hand2 {
position: absolute;
left: 39%;
top: 0;
bottom: 0;
width: 80px;
cursor: w-resize;
}
<div id="container">
<!-- Left side -->
<div id="left"> This is the left side's content!</div>
<!-- middle -->
<div id="middle">
<div id="hand2"></div> This is the middle content!
</div>
<!-- Right side -->
<div id="right">
<!-- Actual resize handle -->
<div id="handle"></div> This is the right side's content!
</div>
</div>
Been playing with it here: https://jsfiddle.net/ju9zb1he/5/

I was looking for a solution that required less extensive CSS. It does have one minor bug(FIXED), but hopefully this should get you started. Here is a DEMO.
Also I aimed to use DOM Traversal methods like .next() and .prev() that way it wouldn't be so attribute dependent, and would be easily reusable if you needed a feature like this multiple times on a page.
Edit - Further Explanation
The idea here is onClick of a .handle we want to gather the total width (var tWidth) of the .prev() and .next() divs relative to the .handle in the DOM. We can then use the start mouse position (var sPos) to substract the amount of pixels we've moved our mouse (e.pageX). Doing so gives us the correct width that the .prev() div should have on mousemove. To get the width of the .next() div we need only to subtract the width of the .prev() div from the total width (var tWidth) that we stored onClick of the .handle. Hope this helps! Let me know if you have any further questions, however I will likely be unavailable till tomorrow.
HTML
<div class="container">
<div id="left"></div>
<div id="l-handle" class="handle"></div>
<div id="middle"></div>
<div id="r-handle" class="handle"></div>
<div id="right"></div>
</div>
CSS
#left, #middle, #right {
display: inline-block;
background: #e5e5e5;
min-height: 200px;
margin: 0px;
}
#l-handle, #r-handle {
display: inline-block;
background: #000;
width: 2px;
min-height: 200px;
cursor: col-resize;
margin: 0px;
}
jQuery
var isDragging = false,
cWidth = $('.container').width(),
sPos,
handle,
tWidth;
$('#left, #middle, #right').width((cWidth / 3) - 7); // Set the initial width of content sections
$('.handle').on('mousedown', function(e){
isDragging = true;
sPos = e.pageX;
handle = $(this);
tWidth = handle.prev().width() + handle.next().width();
});
$(window).on('mouseup', function(e){
isDragging = false;
});
$('.container').on('mousemove', function(e){
if(isDragging){ // Added an additional condition here below
var cPos = sPos - e.pageX;
handle.prev().width((tWidth / 2) - cPos); // This was part of the bug...
handle.next().width(tWidth - handle.prev().width());
// Added an update to sPos here below
}
});
Edit
The bug was caused by 2 things.
1) On mousemove we were dividing the total width by two, instead of an updated mouse offset.
2) The sPos was not updating on mousemove, and stayed a static number based off of the click location.
Resolution
Update the sPos on mousemove that way the mouse offset is accurately based off of the previous mousemove position, rather than the click position. When this is done we can then subtract the .next() div's width from the total width. Then we subtract our current mouse position from the remaining width. The fiddle has been updated as well.
$('.container').on('mousemove', function(e){
var cPos = sPos - e.pageX;
if(isDragging && ((tWidth - handle.next().width()) - cPos) <= tWidth){
handle.prev().width((tWidth - handle.next().width()) - cPos);
handle.next().width(tWidth - handle.prev().width());
sPos = e.pageX;
}
});
Edit
Added an additional condition on mousemove to prevent the drag from exceeding the total width (var tWidth).

Can you please explain what you're trying to accomplish?
I don't believe you need to use position: absolute. The premise of absolute positioning is to override the margin and padding imposed on an element by its parent.
You don't need to do this, all elements have relative positioning by default which makes them push eachother around and don't allow overlapping.
I'm probably missing something, but I think this is what you want with nothing but some very basic CSS: http://jsfiddle.net/3bdoazpk/
<div class='first'>
asdf
</div><div class='second'>
dasdf
</div><div class='third'>
sadf
</div>
body {
margin: 0;
}
div {
display: inline-block;
height: 100%;
}
.first, .third {
width: 40%;
}
.first {
background-color: red;
}
.second {
background-color: blue;
width: 20%;
}
.third {
background-color: green;
}

Animate elements on .click () using .clone () and .animate ()

There're next HTML:
<div class="garden">
<div class="point left">◄</div>
<div class="trees">
<div id="apple">Apple</div>
<div id="cherry">Cherry</div>
<div id="pear">Pear</div>
<div id="oak">Oak</div>
<div id="fir">Fir</div>
</div>
<div class="point right">►</div>
</div>
And CSS:
.garden { position: absolute; top: 135px; left: 150px; }
.garden > div { display:inline-block; }
.trees { width:550px; height:53px; position:relative; font-size:70%; }
.point { width: 16px; height: 15px; background: url(/point-sprite.png) no-repeat;}
.point.left { background-position: -16px 0; }
.point:hover { background-position: 0 0; }
.point.right { background-position: -32px 0; }
.point:hover { background-position: -48px 0 }
.trees > div span { min-width:50px; position:absolute; display:inline-block; top:25px; left:15px; text-align:center; }
#apple, #cherry, #pear, #oak, #fir { position: absolute; color: #0094d9; }
#apple { top: 10px; }
#cherry { top: 2px; left: 90px; }
#pear { left: 180px; }
#oak { left: 280px; }
#fir { top: 2px; left: 373px; }
I need to change the position of the elements to the left after each clicking "point left". And to the right after each clicking "poin right". When an item has a position of leftmost and click "point left" then this item should go right to the rightmost position. One great man (https://stackoverflow.com/users/2121519/stuart-miller) help me to creat next script:
JS
$(document).ready(function () {
function changePositionLeft() {
var trees = $('#trees');
trees.children().each( function(index, child) {
if (index == 0) {
$(child).animate(trees.children().last().position());
}
else {
$(child).animate(trees.children().eq(index - 1).position());
}
});
trees.children().first().appendTo(trees);
}
$(".point.left").click(function() {
changePositionLeft();
});
});
Help transform it according to my task with using .clone. Thanks in advance
Link for script: http://jsfiddle.net/8kkfw7mu/5/

You want us to code the changePositionRight function?
If so, here it is.
I kept the same structure as the changePositionLeft method, but changed the following:
if (index == trees.children().length -1) {
$(child).animate(trees.children().first().position());
}
Instead of targetting the first element and putting it in the last position, we target the last one, and put it in first position.
Then:
else {
$(child).animate(trees.children().eq(index + 1).position());
}
Instead of moving the others elements to the previous position, move them to the next position.
Final result
Add this to your script:
function changePositionRight(){
var trees = $('#trees');
trees.children().each( function(index, child) {
if (index == trees.children().length -1) {
$(child).animate(trees.children().first().position());
}
else {
$(child).animate(trees.children().eq(index + 1).position());
}
});
trees.children().last().appendTo(trees);
}
$(".point.right").click(function() {
changePositionRight();
});

How to toggle (hide / show) sidebar div using jQuery

I have 2 <div>s with ids A and B. div A has a fixed width, which is taken as a sidebar.
The layout looks like diagram below:
The styling is like below:
html, body {
margin: 0;
padding: 0;
border: 0;
}
#A, #B {
position: absolute;
}
#A {
top: 0px;
width: 200px;
bottom: 0px;
}
#B {
top: 0px;
left: 200px;
right: 0;
bottom: 0px;
}
I have <a id="toggle">toggle</a> which acts as a toggle button. On the toggle button click, the sidebar may hide to the left and div B should stretch to fill the empty space. On second click, the sidebar may reappear to the previous position and div B should shrink back to the previous width.
How can I get this done using jQuery?

$('button').toggle(
function() {
$('#B').css('left', '0')
}, function() {
$('#B').css('left', '200px')
})
Check working example at http://jsfiddle.net/hThGb/1/
You can also see any animated version at http://jsfiddle.net/hThGb/2/

See this fiddle for a preview and check the documentation for jquerys toggle and animate methods.
$('#toggle').toggle(function(){
$('#A').animate({width:0});
$('#B').animate({left:0});
},function(){
$('#A').animate({width:200});
$('#B').animate({left:200});
});
Basically you animate on the properties that sets the layout.
A more advanced version:
$('#toggle').toggle(function(){
$('#A').stop(true).animate({width:0});
$('#B').stop(true).animate({left:0});
},function(){
$('#A').stop(true).animate({width:200});
$('#B').stop(true).animate({left:200});
})
This stops the previous animation, clears animation queue and begins the new animation.

You can visit w3school for the solution on this the link is here and there is another example also available that might surely help,
Take a look

The following will work with new versions of jQuery.
$(window).on('load', function(){
var toggle = false;
$('button').click(function() {
toggle = !toggle;
if(toggle){
$('#B').animate({left: 0});
}
else{
$('#B').animate({left: 200});
}
});
});

Using Javascript
var side = document.querySelector("#side");
var main = document.querySelector("#main");
var togg = document.querySelector("#toogle");
var width = window.innerWidth;
window.document.addEventListener("click", function() {
if (side.clientWidth == 0) {
// alert(side.clientWidth);
side.style.width = "200px";
main.style.marginLeft = "200px";
main.style.width = (width - 200) + "px";
togg.innerHTML = "Min";
} else {
// alert(side.clientWidth);
side.style.width = "0";
main.style.marginLeft = "0";
main.style.width = width + "px";
togg.innerHTML = "Max";
}
}, false);
button {
width: 100px;
position: relative;
display: block;
}
div {
position: absolute;
left: 0;
border: 3px solid #73AD21;
display: inline-block;
transition: 0.5s;
}
#side {
left: 0;
width: 0px;
background-color: red;
}
#main {
width: 100%;
background-color: white;
}
<button id="toogle">Max</button>
<div id="side">Sidebar</div>
<div id="main">Main</div>

$('#toggle').click(function() {
$('#B').toggleClass('extended-panel');
$('#A').toggle(/** specify a time here for an animation */);
});
and in the CSS:
.extended-panel {
left: 0px !important;
}

$(document).ready(function () {
$(".trigger").click(function () {
$("#sidebar").toggle("fast");
$("#sidebar").toggleClass("active");
return false;
});
});
<div>
<a class="trigger" href="#">
<img id="icon-menu" alt='menu' height='50' src="Images/Push Pin.png" width='50' />
</a>
</div>
<div id="sidebar">
</div>
Instead #sidebar give the id of ur div.

This help to hide and show the sidebar, and the content take place of the empty space left by the sidebar.
<div id="A">Sidebar</div>
<div id="B"><button>toggle</button>
Content here: Bla, bla, bla
</div>
//Toggle Hide/Show sidebar slowy
$(document).ready(function(){
$('#B').click(function(e) {
e.preventDefault();
$('#A').toggle('slow');
$('#B').toggleClass('extended-panel');
});
});
html, body {
margin: 0;
padding: 0;
border: 0;
}
#A, #B {
position: absolute;
}
#A {
top: 0px;
width: 200px;
bottom: 0px;
background:orange;
}
#B {
top: 0px;
left: 200px;
right: 0;
bottom: 0px;
background:green;
}
/* makes the content take place of the SIDEBAR
which is empty when is hided */
.extended-panel {
left: 0px !important;
}