How to Detect 40% in the Middle of a Div Using jQuery

How to Detect 40% in the Middle of a Div Using jQuery - javascript

Can you please let me know if it is possible to detect the 40% in the Middle of a Div Using jQuery for example in following example I need to enable the mousemove() only on 30% left side or 30% of the right side of the center.
$('#box-wrap').mousemove(function(e){
var x = e.pageX - this.offsetLeft;
var y = e.pageY - this.offsetTop;
console.log("X: " + x + " Y: " + y);
});
html, body{
width:100%;
height:100;
}
#box-wrap{
height:400px;
width:100%;
background:yellow;
}
<div id="box-wrap"></div>
Thanks

Add just two transparent divs as an overlay on the left and right and have the mouse move events only on those. I just added a red border to make them visible:
$('.sensor').mousemove(function(e){
var x = e.pageX - this.offsetLeft;
var y = e.pageY - this.offsetTop;
console.log("X: " + x + " Y: " + y);
});
html, body{
width:100%;
height:100;
}
#box-wrap{
height:400px;
width:100%;
background:yellow;
}
.sensor {
width:30%;
height: 100%;
border: 1px solid red;
background-color: transparent;
cursor: pointer;
}
.left {
position:absolute;
left: 0px;
top: 0px;
}
.right{
position:absolute;
right: 0px;
top: 0px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="box-wrap">
<div class="left sensor"></div>
<div class="right sensor"></div>
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</div>

How about adding two child divs and calling .mousemove() on them instead?
<div id="box-wrap">
<div id="left_30"></div>
<div id="right_30"></div>
</div>
#left_30 {
position: absolute;
width: 30%;
height: 100%;
}
#right_30 {
position: absolute;
width: 30%;
height: 100%;
right: 0px;
}
Check out this working fiddle: https://jsfiddle.net/qeaxu9c9/2/

Try this:
$('#box-wrap').mousemove(function(e){
var t = $(this), w = t.height(), h = t.width(), os = t.offset();
var x = e.pageX - os.left, y = e.pageY - os.top;
console.log("X: " + x + " Y: " + y);
if(x >= w * 0.3 && x <= w * 0.7 && y >= h * 0.3 && y <= h * 0.7){
console.log('Inner 40%');
}
});

Related

Scroll to top button visible only on desktop (no mobile)

I made a scroll to top button that appears when the user scrolls down 25px from the top of the document (otherwise it's not visible) thanks to JavaScript following a tutorial because I still don't know anything about this programming language.
However, I would like it to be visible only on desktop websites and not also on mobile.
I tried using media queries but they don't work since JavaScript has control over the visibility of the button.
What function can I integrate to manage everything with JS?
Here is the code I'm using.
let myButton = document.getElementById("to-top-container");
window.onscroll = function() {
scrollFunction()
};
function scrollFunction() {
if (document.body.scrollTop > 25 || document.documentElement.scrollTop > 25) {
myButton.style.display = "block";
} else {
myButton.style.display = "none";
}
}
#to-top-container {
position: fixed;
bottom: 30px;
right: 3px;
}
.to-top-button {
background-color: #263238;
min-height: 40px;
min-width: 40px;
border-radius: 20px;
text-decoration: none;
display: flex;
justify-content: center;
align-items: center;
box-shadow: 2px 4px 5px rgb(0 0 0 / 30%);
/* animation: Up 2.3s infinite; */
}
#to-top-container .lni {
font-size: 14px;
font-weight: 900;
color: white;
}
<div id="to-top-container">
<a href="#body-container" title="Torna su" class="to-top-button">
<i class="lni lni-chevron-up"></i>
</a>
</div>

There is a JS way to detect if a media query is matched: this is done by using window.matchMedia(). Then it is a matter of adding the appropriate media query to matchMedia() function, and then checking the .matches property in your if block:
let myButton = document.getElementById("to-top-container");
window.onscroll = function() {
scrollFunction()
};
function scrollFunction() {
const matchesMediaQuery = window.matchMedia('(min-width: 600px)');
if (matchesMediaQuery.matches && (document.body.scrollTop > 25 || document.documentElement.scrollTop > 25)) {
myButton.style.display = "block";
} else {
myButton.style.display = "none";
}
}
scrollFunction();
#to-top-container {
position: fixed;
bottom: 30px;
right: 3px;
}
.to-top-button {
background-color: #263238;
min-height: 40px;
min-width: 40px;
border-radius: 20px;
text-decoration: none;
display: flex;
justify-content: center;
align-items: center;
box-shadow: 2px 4px 5px rgb(0 0 0 / 30%);
/* animation: Up 2.3s infinite; */
}
#to-top-container .lni {
font-size: 14px;
font-weight: 900;
color: white;
}
<div id="to-top-container">
<a href="#body-container" title="Torna su" class="to-top-button">
<i class="lni lni-chevron-up"></i>
</a>
</div>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
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Just Add this css in your css file or if you are using bootstrap then add bootstrap media query to disable display in mobile
#media only screen and (max-width: 600px) {
#to-top-container {
display: none;
}
}

You don't need javaScript to do it, you should have used the "a" tag to jump to other pages. But the "a" tag can also jump to an element on the same page.
As defined in the HTML specification, you can use href="#top" or href="#" to link to the top of the current page.
The #media query is set to max-width: 600px - adjust the max-width to fit your needs.
html {
scroll-behavior:smooth;
}
body {
position: relative;
}
.section {
height: 100vh;
background: #dedede;
margin-bottom: 20px;
font-size: 100px;
}
.scroll-container {
position: absolute;
top: 0;
right:0;
height: 100%;
}
.scroll-container:before {
content: '';
display: block;
height: 100vh;
pointer-events: none;
}
.scroll-container a {
position: sticky;
top: 88vh;
cursor: pointer;
font-size: 20px;
}
#media (max-width: 600px) {
.scroll-container a {
display: none;
}
}
<div class="section">Section 1</div>
<div class="section">Section 2</div>
<div class="section">Section 3</div>
<div class="scroll-container">
To Top
</div>

Random <divs> onclick

I'm trying to make a simple game where
you start with 9 circles
when you click on a circle with a thicker border it's going to increment a score and cause new circles to be drawn randomly.
I've already worked on counting stuff but I have a problem, because wherever you click (I mean whatever div) it sums up points. I don't have an idea about how to deactivate div's which do not have a thicker border.
Please tell if this is a good programming approach.
HTML
<body>
<div class="container-fluid">
<div class="row">
<div class="col-md-2">
<h1> Wyniki </h1>
<p> Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet. </p>
</div>
<div class="col-md-8">
<h1> Gra </h1>
<div class="wynik">
<h2> Rezultat </h2>
<p id="zliczenie"> </p>
</div>
<div class="points"> </div>
</div>
<div class="col-md-2">
<h1> Profil </h1>
<p> Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet. </p>
</div>
</div>
</div>
</body>
CSS
body {
background-color: #ecf0f1;
margin : 2% 2%;
}
.wynik{
border : solid 1px blue;
}
.point {
width : 100px;
height : 100px;
border : solid 1px #000;
border-radius : 100%;
text-align : center;
cursor : pointer;
float : left;
margin : 20px;
}
.point:hover {
color : red;
border-radius : 0%;
}
.points{
width : calc(140px * 3);
margin : 5px auto;
}
JS
window.onload = start;
function start()
{
var div_value = "";
for (i = 0; i < 9; i++)
{
var element = "div_number" + i;
div_value = div_value + '<div class="point" id="'+element+'" onclick="c('+i+')"> Klik </div>';
if((i+1)%3 == 0)
{
div_value = div_value + '<div style="clear:both;"> </div>';
}
}
document.getElementsByClassName("points")[0].innerHTML = div_value;
esthetic();
random_show();
}
// IT SHOWS 1 RANDOM DIV TO START THE GAME
function random_show() {
var a = Math.floor((Math.random() * 8));
var x = document.getElementById("div_number" + a).style.border="10px dotted";
}
var liczby = [];
// IT DROWN LOTS AND COUNT THE SCORE
function c(i)
{
var a = Math.floor((Math.random() * 8));
this.i = a;
var z = document.getElementById("div_number" + i);
var y = document.getElementById("div_number" + a);
if(y.style.border = "10px dotted") {
z.style.border ="5px dotted";
liczby.push(i);
} else {
y.style.border="8px solid";
}
var x = document.getElementById("zliczenie").innerHTML = liczby.length;
}
// IT GIVES EVERY DIV INITIAL style.border
function esthetic()
{
var x = document.getElementsByClassName("point");
for (i = 0; i < 9; i++)
{
x[i].style.border = "5px dotted";
}
}
Thanks a lot for any hints one more time!

You can store the current bordered div number in a variable, and each time the click function is called, you can check if the same div number triggered this function call.
Here is your modified code that does this:
window.onload = start;
function start() {
var div_value = "";
for (i = 0; i < 9; i++) {
var element = "div_number" + i;
div_value = div_value + '<div class="point" id="' + element + '" onclick="c(' + i + ')"> Klik </div>';
if ((i + 1) % 3 == 0) {
div_value = div_value + '<div style="clear:both;"> </div>';
}
}
document.getElementsByClassName("points")[0].innerHTML = div_value;
esthetic();
random_show();
}
currDiv = 0;
// IT SHOWS 1 RANDOM DIV TO START THE GAME
function random_show() {
var a = Math.floor((Math.random() * 8));
currDiv = a; // assign current bordered div
var x = document.getElementById("div_number" + a).style.border = "10px dotted";
}
var liczby = [];
// IT DROWN LOTS AND COUNT THE SCORE
function c(i) {
if (parseInt(i) == currDiv) { // check if the current div clicked is the bordered div
var a = Math.floor((Math.random() * 8));
this.i = a;
var z = document.getElementById("div_number" + i);
var y = document.getElementById("div_number" + a);
currDiv = a; // change it to the current bordered div
if (y.style.border = "10px dotted") {
z.style.border = "5px dotted";
liczby.push(i);
} else {
y.style.border = "8px solid";
}
var x = document.getElementById("zliczenie").innerHTML = liczby.length;
}
}
// IT GIVES EVERY DIV INITIAL style.border
function esthetic() {
var x = document.getElementsByClassName("point");
for (i = 0; i < 9; i++) {
x[i].style.border = "5px dotted";
}
}
body {
background-color: #ecf0f1;
margin: 2% 2%;
}
.wynik {
border: solid 1px blue;
}
.point {
width: 100px;
height: 100px;
border: solid 1px #000;
border-radius: 100%;
text-align: center;
cursor: pointer;
float: left;
margin: 20px;
}
.point:hover {
color: red;
border-radius: 0%;
}
.points {
width: calc(140px * 3);
margin: 5px auto;
}
<body>
<div class="container-fluid">
<div class="row">
<div class="col-md-2">
<h1> Wyniki </h1>
<p>Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
</div>
<div class="col-md-8">
<h1> Gra </h1>
<div class="wynik">
<h2> Rezultat </h2>
<p id="zliczenie"></p>
</div>
<div class="points"></div>
</div>
<div class="col-md-2">
<h1> Profil </h1>
<p>Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
</div>
</div>
</div>
</body>
Hope it helps!

It is always good practice to keep the styling in .css file and html tags in .html file and the code in .js file.
Also for checking if a particular style is there on an element, you should just check if the element has a particular class in its classlist. Refer: https://developer.mozilla.org/en/docs/Web/API/Element/classList
Create new classes in your .css as:
.boldCircle {
border: 10px dotted;
}
And in your code just do:
if(y.classlist.contains("boldCircle")) {
// Do what you want
}
Another thing that I would like to point out is the equality in if condition. You should use '==' instead of '='. '=' is assignment operator and evaluates to true always.
if (y.style.border == "10px dotted") {
// Do what you want
}

Building on #DeepakKumar recommendation, I would also think about using a class to flag an element as the active target. Your click event handler can then check for it and increment points/manage your array as needed.
I also simplified the code a bit to better format it for this sandbox.
// =====================
// Initialize the game
// =====================
function start() {
var divTemplate = '<div id="%1%" class="point" data-index="%2%" onclick="c(event)"> Klik </div>';
var clearTemplate = '<div style="clear:both;"> </div>';
var elPoints = document.getElementsByClassName("points")[0];
var div_value = "";
for (i = 0; i < 9; i++) {
div_value += divTemplate
.replace("%1%", "div_number" + i)
.replace("%2%", i);
if ((i + 1) % 3 == 0) { div_value += clearTemplate; }
}
elPoints.innerHTML = div_value;
liczby = [];
random_show();
}
// =====================
// =====================
// Set one div as the target
// =====================
function random_show() {
var a = Math.floor((Math.random() * 8));
var elCurrentTarget = document.querySelector(".point.target");
var elNewTarget = document.getElementById("div_number" + a);
if (elCurrentTarget) { elCurrentTarget.classList.remove("target"); }
elNewTarget.classList.add("target");
}
// =====================
// =====================
// If the target div was clicked increment the score
// reset the board.
// =====================
function c(event) {
var elTarget = event.target;
var elScore = document.getElementById("zliczenie");
if (elTarget.classList.contains("target")) {
liczby.push(elTarget.getAttribute("data-index"));
elScore.innerHTML = liczby.length;
}
random_show();
}
// =====================
var liczby = [];
window.onload = start;
.wynik {
border: solid 1px blue;
}
.points {
width: calc(140px * 3);
margin: 5px auto;
}
.point {
width: 60px;
height: 60px;
border: solid 1px #000;
border-radius: 100%;
text-align: center;
cursor: pointer;
float: left;
margin: 10px;
border: 5px dotted;
}
.point.target {
border: 10px dotted;
}
.point:hover {
color: red;
border-radius: 0%;
}
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha256-916EbMg70RQy9LHiGkXzG8hSg9EdNy97GazNG/aiY1w=" crossorigin="anonymous" />
<div class="container-fluid">
<div class="row">
<div class="wynik">
<span>Rezultat: </span><span id="zliczenie"></span>
</div>
<div class="points"></div>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha256-U5ZEeKfGNOja007MMD3YBI0A3OSZOQbeG6z2f2Y0hu8=" crossorigin="anonymous"></script>

The following code means "score + 1 if you clicked the thick circle, score - 1 otherwise" :
score += i == winning ? +1 : -1;
See conditional operator for details.
A post about randomness : https://stackoverflow.com/a/32395535/1636522.
var boardEl = document.getElementById("board"),
scoreEl = document.getElementById("score"),
indexOf = Array.prototype.indexOf,
winning = 0,
score = 0;
scoreEl.textContent = "( " + score + " )";
boardEl.innerHTML = new Array(10).join("");
boardEl.childNodes[winning].setAttribute("class", "winning");
boardEl.onclick = function (ev) {
var i, rdm, winningEl;
ev.preventDefault();
if (ev.target.parentNode == boardEl) {
i = indexOf.call(boardEl.childNodes, ev.target);
score += i == winning ? +1 : -1;
winningEl = boardEl.childNodes[winning];
winningEl.setAttribute("class", "");
rdm = Math.floor(Math.random() * 8);
winning = rdm >= winning ? rdm + 1 : rdm;
winningEl = boardEl.childNodes[winning];
winningEl.setAttribute("class", "winning");
scoreEl.textContent = "( " + score + " )";
}
};
#board, #score {
display: inline-block;
vertical-align: middle;
}
#board {
width: 150px;
}
#score {
font: bold 32px Arial;
color: #666;
}
#board a {
vertical-align: top;
display: inline-block;
border: 5px dashed #666;
border-radius: 50%;
height: 30px;
width: 30px;
margin: 5px;
}
#board a.winning {
border-width: 10px;
height: 20px;
width: 20px;
}
#board a:hover {
border-color: black;
}
<div id="board"></div>
<div id="score"></div>

Fadein/Fadeout a text inside a div

I would like to know how could I make my div that contains text fade in from bottom to top when scrolling down the page? i will be grateful for your help. Here is my Code:
var $text = $('.textBlock');
$(window).on('scroll', function(event, element) {
$text.each(function(event, element) {
if ($(this).visible()) {
$(this).children('p').stop().fadeIn();
} else {
$(this).siblings('.textBlock p').stop().fadeOut();
}
});
});
.textBlock {
text-align: center;
width: 100%;
height: 118px;
float: left;
display: block;
}
.textBlock p {
font-size: 24px;
padding: 30px 0;
line-height: 25px;
letter-spacing: 0.1em;
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="blockOne" class="textBlock">
<p>Lorem ipsum dolor sit Amet, consectetuer adipiscing.</p>
</div>
<div id="blockTwo" class="textBlock">
<p>Lorem ipsum dolor sit Amet, consectetuer adipiscing.</p>
</div>
<div id="blockThree" class="textBlock">
<p>Lorem ipsum dolor sit Amet, consectetuer adipiscing.</p>
</div>

You need to use a timer function for this. Check this out:
$(function () {
$(".textBlock").hide();
$("#blockOne").show();
$(window).scroll(function () {
numTextBlocks = $(".textBlock").length;
$(".textBlock:visible").fadeOut(400, function () {
console.log(".textBlock:nth-child(" + ($(window).scrollTop() * 10) % numTextBlocks + ")");
$(".textBlock:nth-child(" + ($(window).scrollTop() * 10) % numTextBlocks + ")").fadeIn(400);
});
});
});
html, body {
height: 150%;
}
.textBlock {
position: fixed;
text-align: center;
width: 100%;
height: 118px;
}
.textBlock p {
font-size: 24px;
padding: 30px 0;
line-height: 25px;
letter-spacing: 0.1em;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="blockOne" class="textBlock">
<p>One Lorem ipsum dolor sit Amet, consectetuer adipiscing.</p>
</div>
<div id="blockTwo" class="textBlock">
<p>Two Lorem ipsum dolor sit Amet, consectetuer adipiscing.</p>
</div>
<div id="blockThree" class="textBlock">
<p>Three Lorem ipsum dolor sit Amet, consectetuer adipiscing.</p>
</div>

This is what I used:
$(document).on("mousewheel", function () {
$(".textBlock:not(:visible)").first().fadeIn("slow")
});
Here is the JSFiddle demo

Let me know if this code works with you.
Fiddle
$(window).on("load",function() {
function fade() {
$('.fade').each(function() {
/* Check the location of each desired element */
var objectBottom = $(this).offset().top + $(this).outerHeight();
var windowBottom = $(window).scrollTop() + $(window).innerHeight();
/* If the object is completely visible in the window, fade it in */
if (objectBottom < windowBottom) { //object comes into view (scrolling down)
if ($(this).css('opacity')==0) {$(this).fadeTo(500,1);}
} else { //object goes out of view (scrolling up)
if ($(this).css('opacity')==1) {$(this).fadeTo(500,0);}
}
});
}
fade(); //Fade in completely visible elements during page-load
$(window).scroll(function() {fade();}); //Fade in elements during scroll
});

Change Width of Element via scrollTop

I'm looking to achieve an affect like you can see here: http://www.nearme.co.il/Code/index.htm (if it's not working in Chrome try IE).
This is what I achieved so far: http://jsfiddle.net/yuvalsab/op9sg2L2/
HTML
<div class="trasition_wrapper">
<div class="trasition">1</div>
<div class="trasition">2</div>
<div class="trasition">3</div>
<div class="trasition">4</div>
<div class="trasition">5</div>
<div class="trasition">6</div>
<div class="trasition">7</div>
<div class="trasition">8</div>
<div class="trasition">9</div>
<div class="trasition">10</div>
<div class="trasition">11</div>
<div class="trasition">12</div>
<div class="trasition">13</div>
<div class="trasition">14</div>
<div class="trasition">15</div>
</div>
<div class="pagewrap">
<div class="some_text_1">Lorem ipsum dolor sit amet.</div>
<div class="some_text_2">Lorem ipsum dolor sit amet.</div>
<div class="some_text_3">Lorem ipsum dolor sit amet.</div>
<div class="some_text_4">Lorem ipsum dolor sit amet.</div>
<div class="some_text_5">Lorem ipsum dolor sit amet.</div>
<div class="some_text_6">Lorem ipsum dolor sit amet.</div>
<div class="some_text_7">Lorem ipsum dolor sit amet.</div>
<div class="some_text_8">Lorem ipsum dolor sit amet.</div>
<div class="some_text_9">Lorem ipsum dolor sit amet.</div>
<div class="some_text_10">Lorem ipsum dolor sit amet.</div>
<div class="some_text_11">Lorem ipsum dolor sit amet.</div>
<div class="some_text_12">Lorem ipsum dolor sit amet.</div>
<div class="some_text_13">Lorem ipsum dolor sit amet.</div>
<div class="some_text_14">Lorem ipsum dolor sit amet.</div>
</div>
CSS
div[class^="some_text"] {
padding:50px 0;
border-bottom:1px solid;
}
div.trasition_wrapper {
width:100%;
position: fixed;
left:100%;
background:red;
}
.trasition {
background: red;
position: absolute;
width:100%;
}
jQuery
function animate(element) {
var lastScrollTop = 0;
window_width = $(window).innerWidth();
$(window).scroll(function(event){
var scrolltop = $(this).scrollTop();
var stcalc = $(this).scrollTop()*3; // 3 -> Sets the speed of the animation
if(stcalc >= window_width) {
stcalc = window_width;
}
if(stcalc < window_width) {
element.animate({
left:-stcalc
}, 10);
}
else {
stcalc = window_width;
element.animate({
left:-stcalc
}, 10);
}
lastScrollTop = scrolltop;
});
}
jQuery(document).ready(function(){
jQuery('.trasition_wrapper .trasition').each(function() {
var element = jQuery(this);
pos=0;
position = pos+40;
animate(element);
element.css('top',position+'px');
});
});

Here's a decent solution. It could be cleaned up a bit, but it works.
http://jsfiddle.net/scheda/4tsokks7/
$(document).on('scroll', function(e) {
var bodyHeight = $(document).height()
var windowHeight = $(window).height();
var scrollTop = $(document).scrollTop();
var whereAmI = scrollTop + windowHeight
//we need to make sure we're calculating the percentage correctly
if (scrollTop < windowHeight) {
var heightPercentage = scrollTop / bodyHeight * 100;
} else {
var heightPercentage = whereAmI / bodyHeight * 100;
}
$('.scroll-progress').css('width', heightPercentage + '%');
$('.progress').text(Math.round(heightPercentage));
});
It's pretty simple. Basically it just calculates where you are in your scroll and then updates .scroll-progress with a new width and text.

Multiple Sticky Headers - CSS / JavaScript / AngularJS

I tried to find some solution for the following scenario:
Header height is all different
Mouse scroll down
Fixed headers
Does anyone know how to make multiple sticky headers like this?
(1) init
(2) scroll down (using mouse)
(3) scroll down (using mouse)

hmm...
DEMO
$(window).scroll(function() {
var $headers = $(".header");
var scrollTop = $(this).scrollTop();
if (scrollTop <= 0) {
// reset all
$headers.css({
position: "relative",
top: "0px"
});
} else {
$headers.each(function(index, $el) {
var $curHeader = $($headers).eq(index);
var curTop = $curHeader.offset().top;
var curHeight = $curHeader.height();
// scroll up
var isRelative = ($el.isFixed && scrollTop <= $el.exTop);
// scroll down
var isFixed = (curTop <= scrollTop);
var position = "";
var top = 0;
if (isRelative) {
// reset
positon = "relative";
top = 0;
$el.isFixed = false;
} else if (isFixed) {
position = "fixed";
if (0 < index) {
for (var i = 0; i < index; i++) {
top += $($headers).eq(i).height();
}
}
scrollTop += curHeight;
if (!$el.isFixed) {
$el.isFixed = true;
$el.exTop = curTop;
}
}
$($el).css({
position: position,
top: top + "px"
});
});
}
});
body {
height: 10000px;
}
div {
height: 200px;
background: gray;
width: 100%;
}
.header {
height: 50px;
background: green;
}
div.header:nth-child(7) {
height: 100px;
}
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<div>content 0</div>
<div class="header">header 1</div>
<div>content 1</div>
<div class="header">header 2</div>
<div>content 2</div>
<div class="header">header 3</div>
<div>content 3</div>
</body>
</html>

Here is a simple example:
I'm calculating the height of the headers and setting the top property.
DEMO
$(window).scroll(function () {
var $headers = $(".header");
if ($(this).scrollTop() > 50) {
$headers.each(function (index, el) {
var height = 0;
if (index == 0) {
height = "0px";
} else {
for ( var x = index - 1; x >= 0; x--) {
height += $headers.eq(x).height();
}
}
height = height + "px";
$(el).css({
"position": "fixed",
"top": height
});
});
} else {
$headers.css({
position: "relative",
top: "0"
});
}
});
body {
height: 10000px;
}
div {
height: 100px;
background: green;
width: 100%;
}
.header {
height: 50px;
background: red;
}
.header:first-child {
height: 20px;
}
div.header:nth-child(5) {
height: 100px;
}
<!DOCTYPE html>
<html>
<head>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<div class="header">header 1</div>
<div>content 1</div>
<div class="header">header 2</div>
<div>content 2</div>
<div class="header">header 3</div>
<div>content 3</div>
</body>
</html>

With only css
Codepen-FollowMe Headers
body {
margin:0;
min-height:200vh;
border:2px solid;
}
.first {
height:50px;
background:red;
height: 10rem;
}
.second {
height:50px;
background:blue;
height: 10rem;
}
.third {
height:50px;
background:green;
height: 10rem;
}
.stickyContainer {
.sticky {
position: sticky;
top: 0;
height: 2rem;
background: white;
}
}
<div class="first stickyContainer">
<div class="sticky"><h1>1</h1></div>
<p>lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum</p>
</div>
<div class="second stickyContainer">
<div class="sticky"><h1>2</h1></div>
<p>lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum</p>
</div>
<div class="third stickyContainer">
<div class="sticky"><h1>3</h1></div>
<p>lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum</p>
</div>

Develop Reference

JavaScript is the programming language of the Web.

How to Detect 40% in the Middle of a Div Using jQuery - javascript

Try this: $('#box-wrap').mousemove(function(e){ var t = $(this), w = t.height(), h = t.width(), os = t.offset(); var x = e.pageX - os.left, y = e.pageY - os.top; console.log("X: " + x + " Y: " + y); if(x >= w * 0.3 && x <= w * 0.7 && y >= h * 0.3 && y <= h * 0.7){ console.log('Inner 40%'); } });

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Multiple Sticky Headers - CSS / JavaScript / AngularJS

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