switch z-index change on click (vanillaJS) - javascript

I'm trying to change the z-index on the clicked item on vanilla JS.
When a click event happens, the clicked item should come front. There are only two divs atm, but there will be more.
I'm storing the last clicked item, so that if new click event happens the last clicked item have less z-index. But it doesn't seem to work.(both of items are position relative)
Any help would be appreciated.
<div class="post" data-name="post" draggable="true">1</div>
<div class="post" data-name="post" draggable="true">2</div>
const a = new A()
memoSection.addEventListener('click', ({target})=>{
switch(target.dataset.name){
case "post":
let clickedItem ="";
a.bringFront(clickedItem)
break;
})
class A{
constructor(){
this.selected = null
}
bringFront(clickedItem){
this.selected = clickedItem; //store the previously clicked element
if(!clickedItem.style.zIndex == 10 || !clickedItem.style.zIndex){
this.selected.zIndex = 0
clickedItem.style.zIndex = 10
} else {
this.selected.zIndex = 10
clickedItem.style.zIndex = 0 }
}
}

I don't understand what your code was trying to do, but here is example how to get desired effect:
document.querySelectorAll('.post').forEach(item => {
//get all elements with class .post
item.addEventListener('click', event => {
// add Event Listener to each
document.querySelectorAll('.post').forEach(el => {
el.style.zIndex = "0";
})
// when clicked fetch all again and set all back to 0
item.style.zIndex = "10";
//set clicked only to 10
console.clear()
console.log(item.innerHTML);
})
})
.post:first-of-type {
position: absolute;
background-color: blue;
left: 100px;
top: 50px;
width: 150px;
height: 150px;
z-index: 0;
}
.post {
position: absolute;
background-color: red;
left: 25px;
top: 50px;
width: 150px;
height: 150px;
z-index: 0;
}
<div class="post" data-name="post" draggable="true">1</div>
<div class="post" data-name="post" draggable="true">2</div>

Related

Adding multiple .random classes to multiple divs without a duplication

Trying to add a random class to two classes (.left & .right) but with a rule of the two random divs cannot appear at the same time
JS:
$(document).ready(function(){
var classes = ['random-1','random-2', 'random-3']; //add as many classes as u want
var randomnumber = Math.floor(Math.random()*classes.length);
$('.left').addClass(classes[randomnumber]);
});
HTML:
<div class="left">
Left
</div>
<div class="right">
Right
</div>
.left {
background: blue;
height: 100vh;
width: 50%;
float: left;
position: relative;
}
.right {
background: red;
height: 100vh;
width: 50%;
float: right;
}
.random-1 {
background: orange;
}
.random-2 {
background: yellow;
}
.random-3 {
background: pink;
}
.random-4 {
background: green;
}
.random-5 {
background: blueviolet;
}
Ideal result would be
<div class="left random-1">
Left
</div>
<div class="right random-4">
Right
</div>
https://codepen.io/anon/pen/OOJaqL
You can use a while loop that iterates until two random and unique classes have been chosen.
function getRandomClass() {
let classes = ['random-1','random-2', 'random-3'];
let index = Math.floor(Math.random() * classes.length);
return classes[index];
}
$(document).ready(function() {
let leftClass = null;
let rightClass = null;
while (leftClass == rightClass) {
leftClass = randomClass();
rightClass = randomClass();
}
$('.left').addClass(leftClass);
$('.right').addClass(rightClass);
});
Add the .random-* class to the left div, only when the right div does not have this class.
var rightHasClass = $('.right').hasClass(classes[randomnumber]);
if( ! rightHasClass){
$('.left').addClass(classes[randomnumber]);
}
var leftHasClass = $('.left').hasClass(classes[randomnumber]);
if( ! leftHasClass){
$('.right').addClass(classes[randomnumber]);
}

Stick div at top not working properly : javascript

I going to create a scroll and stick div which has to stick on the top of the page but while scrolling down the div next to stickdiv automatically stick to the div before to sticky div
var left = document.getElementsByClassName("stickdiv");
for (var i = 0; i < left.length; i++) {
var stop = (left[0].offsetTop);
window.onscroll = function(e) {
var scrollTop = (window.pageYOffset !== undefined) ? window.pageYOffset : (document.documentElement || document.body.parentNode || document.body).scrollTop;
// left.offsetTop;
if (scrollTop >= stop) {
// get array item by index
left[0].classList.add('stick'); //adding a class name
} else {
// get array item by index
left[0].classList.remove('stick');
}
}
}
.stickdiv {
height: 50vh!important;
width: 100vh!important;
background-color: green!important;
}
.stick {
position: fixed;
top: 0;
margin: 0 0
}
#right {
float: right;
width: 100px;
height: 1000px;
background: red;
}
.des {
height: 300px;
width: 100%;
background-color: #000;
}
<div class="des"></div>
<div class="stickdiv"></div>
<div id="right"></div>
Example : green color div is the sticky div but after scrollingdown , red is also going to stick , I've tried position absolute in css but not working how to fix it
Here is the code to make green sticky when scrolling.
$ = document.querySelectorAll.bind(document);
// how far is the green div from the top of the page?
var initStickyTop = $(".stickdiv")[0].getBoundingClientRect().top + pageYOffset;
// clone the green div
var clone = $(".stickdiv")[0].cloneNode(true);
// hide it first
clone.style.display = "none";
// add it to dom
document.body.appendChild(clone);
addEventListener("scroll",stick=function() {
// if user scroll past the sticky div
if (initStickyTop < pageYOffset) {
// hide the green div but the div still take up the same space as before so scroll position is not changed
$(".stickdiv")[0].style.opacity = "0";
// make the clone sticky
clone.classList.add('stick');
// show the clone
clone.style.opacity="1";
clone.style.display = "block";
} else {
// make the clone not sticky anymore
clone.classList.remove("stick");
// hide it
clone.style.display = "none";
// show the green div
$(".stickdiv")[0].style.opacity="1";
};
});
// when resize, recalculate the position of the green div
addEventListener("resize", function() {
initStickyTop = $(".stickdiv")[0].getBoundingClientRect().top + pageYOffset;
stick();
});
.stickdiv {
height: 50vh!important;
width: 100vh!important;
background-color: green!important;
}
.stick {
position: fixed;
top: 0;
margin: 0 0
}
#right {
float: right;
width: 100px;
height: 1000px;
background: red;
}
.des {
height: 300px;
width: 100%;
background-color: #000;
}
<div class="des"></div>
<div class="stickdiv"></div>
<div id="right"></div>
JS FIDDLE
you might want to remove the stickdiv class and add it accordingly
if (scrollTop >= stop) {
// get array item by index
left[0].classList.add('stick'); //adding a class name
left[0].classList.remove('stickdiv');
} else {
// get array item by index
left[0].classList.remove('stick');
left[0].classList.add('stickdiv');
}

can a click event be triggered on absolutely stacked elements?

I have a click event thats firing. It's working great and does what I need it to do. Here's the problem
The nature of the widget i'm building stacks elements on top of each other through position: absolute When i click on one of these stacked elements, only one event is firing, but id like every element to fire that is under the mouse cursor of the click. Is there a way to do this?
Please check the demo or run the code snippet in full page and click through all the divs to see the result message.
DEMO:
http://plnkr.co/edit/KRWvLmRhGbO200pFkOxL?p=preview
What I am doing here is :
Hide the top element
and
get the next absolute element's co-ordinate with document.elementFromPoint and then repeat.
Stack Snippet:
jQuery(document).ready(function(){
$common = $("div.common").on('click.passThrough', function (e, ee) {
var $element = $(this).hide();
try {
if (!ee) $("#output").empty();
$("<div/>").append('You have clicked on: '+$element.text()).appendTo($("#output"));
ee = ee || {
pageX: e.pageX,
pageY: e.pageY
};
var next = document.elementFromPoint(ee.pageX, ee.pageY);
next = (next.nodeType == 3) ? next.parentNode : next //Opera
$(next).trigger('click.passThrough', ee);
} catch (err) {
console.log("click.passThrough failed: " + err.message);
} finally {
$element.show();
}
});
$common.css({'backgroundColor':'rgba(0,0,0,0.2)'});
});
#output {
margin-bottom: 30px;
}
.common {
position: absolute;
height: 300px;
width: 300px;
padding: 3px;
border: 1px #000 solid;
}
.elem5 {
top: 150px;
left: 150px;
}
.elem4 {
top: 180px;
left: 180px;
}
.elem3 {
top: 210px;
left: 210px;
}
.elem2 {
top: 240px;
left: 240px;
}
.elem1 {
top: 270px;
left: 270px;
}
<script data-require="jquery#3.0.0" data-semver="3.0.0" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.js"></script>
<div id="output"></div>
<div class="common elem1">Top Most Element</div>
<div class="common elem2">Element 2</div>
<div class="common elem3">Element 3</div>
<div class="common elem4">Element 4</div>
<div class="common elem5">Bottom Element</div>
Credit for source:
http://jsfiddle.net/E9zTs/2/
You can use customEvent property
Place all div in a parent div
add a click handler to the parent div
if there is a click in the parent box..determine whether the click is in any of the child boxes
If true. then send a click event to all child box
snippet
//This function changes the color of all child divs
function changeColor(e) {
this.style.background = "red";
}
//this function is attached to the parent div which will send that click event to all divs
function trigger(e) {
//create an event
event = new CustomEvent('click');
//if the event originates from a child div
if (e.target.className == 'box')
//loop through all child div
for (var i = 0; i < all_box.length; ++i) {
//dispatch a click event to each child div
all_box[i].dispatchEvent(event);
}
}
document.getElementById('parent').addEventListener('click', trigger)
var all_box = document.getElementsByClassName('box');
for (var i = 0; i < all_box.length; ++i) {
all_box[i].addEventListener('click', changeColor)
}
.box {
padding: 10px;
display: inline-block;
border: solid black;
}
#parent {
border: solid black;
padding: 10px;
}
;
<div id="parent">
<div class="box" id="primary">box1</div>
<div class="box">box2</div>
<div class="box">box3</div>
<div class="box">box3</div>
</div>

Alternate z-index between 2 divs on click?

I'm not great with JS so been using trial and error to try and figure out how to get 2 divs to swap z-index on the click of a trigger (button).
I currently have 2 drawers that technically are on top of each other and slide out from the right. On click of 'Buy' the #QuickShopDrawer should open and on click of 'Cart' or 'Add to Cart' the #CartDrawer should open.
Link to my test store.
My code so far is making the open with the #CartDrawer on top with a higher z-index.
JS:
Drawer.prototype.init = function () {
$(this.config.open).on('click', $.proxy(this.open, this));
$('.js-drawer-open-right-two').click(function(){
$(this).data('clicked', true);
});
if($('.js-drawer-open-right-two').data('clicked')) {
//clicked element, do-some-stuff
$('#QuickShopDrawer').css('z-index', '999');
} else {
//run function 2
$('#CartDrawer').css('z-index', '999');
}
this.$drawer.find(this.config.close).on('click', $.proxy(this.close, this));
};
I've tried this which is more of what I want but it's only firing once?
$('.js-drawer-open-right-two').click(function() {
var i = $(this).index();
$('.drawer--right').hide();
$('.drawer--right-two' + (i+1)).show();
});
Any help would be greatly appreciated!
You need to swap the z-index of the elements on button click. Also, you can disable the button on click so that user cannot click it continiously.
Demo
$(document).ready(function() {
$('#buy').on('click', function(e) {
var myZindex = $('#QuickShopDrawer').css('z-index');
$('#QuickShopDrawer').css('z-index', $('#CartDrawer').css('z-index'));
$('#CartDrawer').css('z-index', myZindex);
$(this).prop('disabled', true).siblings('button').prop('disabled', false);
});
$('#addToCart').on('click', function(e) {
var myZindex = $('#CartDrawer').css('z-index');
$('#CartDrawer').css('z-index', $('#QuickShopDrawer').css('z-index'));
$('#QuickShopDrawer').css('z-index', myZindex);
$(this).prop('disabled', true).siblings('button').prop('disabled', false);
});
});
button {
position: absolute;
top: 150px;
left: 0;
clear: both;
}
#addToCart {
margin-left: 50px;
}
.red {
position: absolute;
width: 100px;
height: 100px;
background-color: red;
left: 20px;
top: 20px;
z-index: 1;
}
.green {
position: absolute;
width: 100px;
height: 100px;
background-color: green;
z-index: 2;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<div>
<div id="QuickShopDrawer" class="red">fdsafdsafdsa</div>
<div id="CartDrawer" class="green">fdsafdsafdsa</div>
</div>
<button id="buy">Buy</button>
<button id="addToCart">Add To Cart</button>

How to move a carousel item to the middle when it's clicked in jquery

How can I make the carousel center the item I've clicked to the middle? I've looked everywhere for an answer but they're not straight answers... Can someone help me in this, please?
This is what I've done so far: http://jsfiddle.net/sp9Jv/
HTML:
<div id="wrapper">
<div id="carousel">
prev
next
<div class="viewport">
<ul>
<li>Un</li>
<li>Deux</li>
<li>Trois</li>
<li>Quatre</li>
<li>Cinq</li>
<li>Six</li>
<li>Sept</li>
<li>Huit</li>
</ul>
</div>
<!-- viewport -->
</div>
<!-- carousel -->
</div>
<!-- wrapper -->
JavaScript:
var carousel = $('#carousel'),
prev = carousel.find('.prev'),
next = carousel.find('.next'),
viewport = carousel.find('.viewport'),
item = viewport.find('li'),
itemWidth = item.outerWidth(true),
itemNum = item.length,
itemList = viewport.find('ul');
itemList.width(itemWidth * itemNum);
var moveCarousel = function(dir) {
itemList.animate({ left: '-=' + (itemWidth * dir) + 'px' }, 400);
};
//prev
prev.on('click', function(e) {
e.preventDefault();
moveCarousel(-1);
});
//next
next.on('click', function(e) {
e.preventDefault();
moveCarousel(1);
});
//carousel item
item.on('click', 'a', function(e) {
var self = $(this),
selfIndex = self.index(),
distance = itemList.width() / 2,
selfPos = self.position(),
selfPosLeft = selfPos.left,
viewportPosLeft = viewport.position().left;
e.preventDefault();
//move item to middle, but it doesn't work...
if (selfPosLeft > Math.floor(viewport.width())/3) {
itemList.animate({ left: '-' + Math.floor(viewport.width())/3 + 'px' }, 400);
}
if (selfPosLeft < Math.floor(viewport.width())/3) {
itemList.animate({ left: Math.floor(viewport.width())/3 + 'px' }, 400);
}
});
CSS:
#wrapper {
width: 500px;
margin: 20px auto;
}
#carousel {
position: relative;
}
.viewport {
width: 260px;
border: 1px solid #6e6e6e;
height: 80px;
overflow: hidden;
position: relative;
margin-left: 100px;
}
.prev, .next {
position: absolute;
}
.prev {
top: 20px;
left: 0;
}
.next {
top: 20px;
right: 0;
}
.viewport ul {
position: absolute;
}
.viewport li {
float: left;
margin-right: 10px;
}
.viewport li a {
display: block;
width: 80px;
height: 80px;
background: #ddd;
}
While you have prepared all the information needed about all items, you can calculate the value of the left based on the clicked item.
Here is my modification:
and I've bound the click action of carousel items with this function and passed the clicked item using the self keyword.
var itemClicked=function(item){
var itemIndex=$(item).index(),
newLeft=(itemIndex*itemWidth*-1)+Math.floor(($(viewport).width()/itemWidth)/2)*itemWidth;
$(itemList).animate({left:newLeft+"px"},400);
};
You can check it working on this url: http://jsfiddle.net/rUZHg/3/
I assume that this should work despite of the number of viewed elements while it calculates the padding between the left 0 and the left of the center element.
Alright, it's ugly, I hope it gives you some ideas.
I created a global currentItem that tracks what's in the center. Every time the carousel moves this is updated.
The very useful variable I found was selfPosLeft which told me what was being clicked. I should add that 90 was the multiple I got from clicking around. Must be linked to your CSS and I don't know how to find this number dynamically.
Please try it :) http://jsfiddle.net/sp9Jv/4/
Well, I'm picturing that when you have more than 3 items you can change the code to compute the difference between the current item and the selfPosLeft of the clicked one, I'll leave that to you :) Like this, seems to work. http://jsfiddle.net/sp9Jv/5/

Categories