Develop Reference

if statement when button is clicked

Trying to make an if statement in JS that when one of the top 3 buttons changes, it checks which of the bottom 2 has the "active" class. and visa versa
So when I click 30g it will check if option a or option b is active, and then change the price accordingly.
Any help would be greatly appreciated as I'm kind of a noob.
$(function(){
$('ul.nav li').on('click', function(){
$(this).parent().find('li.activeBtn').removeClass('activeBtn');
$(this).addClass('activeBtn');
});
});
function myFunction(){
const element = document.getElementById("30");
const element2 = document.getElementById("no");
const pricetag = document.getElementById("price");
if(((element.classList.contains("activeBtn")) == true) && ((element2.classList.contains("activeBtn")) == true)){
pricetag.innerHTML = "€1,00";
}
}
ul.nav a {
border: 2px solid #E1E8EE;
border-radius: 6px;
padding: 13px 20px;
font-size: 14px;
color: #5E6977;
background-color: #fff;
cursor: pointer;
transition: all .5s;
display: inline-block;
vertical-align: middle;
}
.activeBtn {
color: grey;
font-weight: 1000;
border: 2px solid grey;
border-radius: 6px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="nav">
<li id="30" onclick="myFunction()" class="activeBtn"><a>30g</a></li>
<li id="70" onclick="myFunction()"><a>70g</a></li>
<li id="90" onclick="myFunction()"><a>90g</a></li>
</ul>
<ul class="nav">
<li id="no" class="activeBtn"><a>Zonder kreeftensoep</a></li>
<li id="yes"><a>Met kreeftensoep</a></li>
</ul>
<br>
<div class="product-price">
<span id="price">148$</span>
</div>

Are you trying to update the total price depending on which element is already selected ?
If that's the case, you can use a for loop event binding ->
// You should add a '.nav__el' class to your <li> elements in html
const navEls = document.querySelectorAll('.nav__el')
// Bind an event listener to all your buttons
navEls.forEach(el => {
el.addEventListener('click', () => {
const domPrice = document.querySelector('#price')
// Get the price related to your button
const price = el.getAttribute('data-price')
// Get the current total
const currentPrice = parseInt(domPrice.innerText)
if(el.classList.contains('activeBtn')) {
el.classList.remove('activeBtn')
domPrice.innerText = `${currentPrice - price}$`
}
else {
el.classList.add('activeBtn')
domPrice.innerText = `${currentPrice + price}$`
}
})
})

jQuery Navigation Carousel

I'm trying to make a carousel-like navigation and subnavigation.
This script works almost as I expected:
https://jsfiddle.net/xpvt214o/23270/
Here is how it should work:
If the navigation overflows, make next arrow visible.
If we scroll right, make the left arrow visible.
Hide both arrows if the navigation does not overflow.
In the first script I have a few problems:
1) Prev and next arrows from both navs work for first nav
2) When I scroll right and really get to the end of the navigation, I need to click the next arrow once more before it hides.
To make appropriate arrows work with their navigations I wrap my main code in a function and replace $('.go-left') to nav.find('.go-left') and same for the right arrow. Here's the code:
https://jsfiddle.net/0z5u4vyt/5/
The arrows are supposed to work but they don't. Please, I need your help!

in your javascript code var prevArrow = nav.find('.go-left'); and var nextArrow = nav.find('.go-right'); don't get value so change your code to
var prevArrow = nav.siblings('.go-left');
var nextArrow = nav.siblings('.go-right');
function navCarousel(el) {
var nav = el;
var navFirstItem = nav.find('li:first-child');
var navLastItem = nav.find('li:last-child');
var prevArrow = nav.siblings('.go-left');
var nextArrow = nav.siblings('.go-right');
function checkNavOverflow() {
if (nav.prop('scrollWidth') > nav.width() &&
(nav.find('ul').width() - navLastItem.offset().left) < 51) {
nextArrow.css('display', 'block');
} else {
nextArrow.css('display', 'none');
}
if (navFirstItem.offset().left < 15) {
prevArrow.css('display', 'block');
} else {
prevArrow.css('display', 'none');
}
}
checkNavOverflow();
$(window).on('resize', function() {
checkNavOverflow();
// console.log(nav.find('ul').width() - navLastItem.offset().left);
});
prevArrow.click(function() {
var pos = nav.scrollLeft() - 200;
nav.animate( { scrollLeft: pos }, 300, checkNavOverflow());
});
nextArrow.click(function() {
var pos = nav.scrollLeft() + 200;
nav.animate( { scrollLeft: pos }, 300, checkNavOverflow());
});
}
navCarousel($('.category-navigation .category-navigation-container'));
navCarousel($('.subcategory-navigation .subcategory-navigation-container'));
body {
background: #20262e;
padding: 0;
margin: 0;
font-family: Helvetica;
}
.category-navigation, .subcategory-navigation {
background-color: #fff;
position: relative;
border-bottom: 1px solid grey;
}
.category-navigation-container, .subcategory-navigation-container {
overflow: hidden;
}
.category-navigation ul, .subcategory-navigation ul {
list-style: none;
display: flex;
white-space: nowrap;
}
.category-navigation ul li, .subcategory-navigation ul li {
padding: 20px;
}
.category-navigation .go-left, .subcategory-navigation .go-left, .category-navigation .go-right, .subcategory-navigation .go-right {
display: none;
position: absolute;
top: 50%;
transform: translateY(-50%);
cursor: pointer;
width: 20px;
height: 20px;
background-color: grey;
z-index: 9;
border-radius: 50%;
padding: 10px;
text-align: center;
}
.category-navigation .go-left, .subcategory-navigation .go-left {
left: 0;
}
.category-navigation .go-right, .subcategory-navigation .go-right {
right: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="category-navigation">
<div class="go-left">←</div>
<div class="category-navigation-container">
<ul>
<li>Category Item 1</li>
<li>Category Item 2</li>
<li>Category Item 3</li>
<li>Category Item 4</li>
<li>Category Item 5</li>
<li>Category Item 6</li>
<li>Category Item 7</li>
<li>Category Item 8</li>
<li>Category Item 9</li>
</ul>
</div>
<div class="go-right">→</div>
</div>
<div class="subcategory-navigation dropdown">
<div class="go-left">←</div>
<div class="subcategory-navigation-container">
<ul>
<li>
<a href="#">
<div>Subitem 1</div>
</a>
</li>
</ul>
</div>
<div class="go-right">→</div>
</div>

How to get updated top position of scrolled up div?

http://codepen.io/leongaban/pen/YNBgqE
After you scroll the #tickers-col how do you get the correct updated top position of the div?
From the log no matter how far up the column goes, it still displays the original y position of the div:
colPos Object {x: 8, y: 8}
const tickersCol = document.getElementById("tickers-col");
// https://stackoverflow.com/questions/288699/get-the-position-of-a-div-span-tag
function getPos(el) {
for (var lx=0, ly=0;
el != null;
lx += el.offsetLeft, ly += el.offsetTop, el = el.offsetParent);
return {x: lx,y: ly};
}
function mouseHover() {
const colPos = getPos(tickersCol);
console.log('colPos', colPos)
}
.container {
position: fixed;
font-family: Arial;
}
#tickers-col {
overflow-y: auto;
height: 400px;
}
li {
margin-bottom: 10px;
list-style: none;
padding: 5px 10px;
width: 120px;
color: white;
background: salmon;
border-radius: 4px;
cursor: pointer;
}
<div class="container">
<div id="tickers-col">
<ul>
<li onmouseenter="mouseHover()">aaa</li>
<li onmouseenter="mouseHover()">bbb</li>
<li onmouseenter="mouseHover()">ccc</li>
<li onmouseenter="mouseHover()">ddd</li>
<li onmouseenter="mouseHover()">eee</li>
<li onmouseenter="mouseHover()">fff</li>
<li onmouseenter="mouseHover()">ggg</li>
<li onmouseenter="mouseHover()">hhh</li>
<li onmouseenter="mouseHover()">iii</li>
<li onmouseenter="mouseHover()">jjj</li>
<li onmouseenter="mouseHover()">kkk</li>
<li onmouseenter="mouseHover()">lll</li>
<li onmouseenter="mouseHover()">mmm</li>
<li onmouseenter="mouseHover()">nnn</li>
<li onmouseenter="mouseHover()">ooo</li>
<li onmouseenter="mouseHover()">ppp</li>
<li onmouseenter="mouseHover()">qqq</li>
<li onmouseenter="mouseHover()">rrr</li>
<li onmouseenter="mouseHover()">sss</li>
<li onmouseenter="mouseHover()">ttt</li>
<li onmouseenter="mouseHover()">uuu</li>
<li onmouseenter="mouseHover()">vvv</li>
<li onmouseenter="mouseHover()">www</li>
<li onmouseenter="mouseHover()">yyy</li>
<li onmouseenter="mouseHover()">xxx</li>
<li onmouseenter="mouseHover()">zzz</li>
</ul>
</div>
</div>
Found the getPos function from here: Get the position of a div/span tag

So, I really don't understand what exactly you are trying to do but by definition the offsetTop property of an element will return the top position (in pixels) relative to the top of the offsetParent element.
So no matter how long you scroll, if the top distance between the element you are inspecting and it's parent does't change, your top value will not change.
Maybe the property you are looking for is scrollTop;
const getPos = (el) => {
for (var lx=0, ly=0;
el != null;
lx += el.offsetLeft, ly += el.scrollTop, el = el.offsetParent);
return { x:lx, y:ly };
}

Try the code blow.
Scroll and then hover on one of the divs, you can see the y-coordinate is getting updated.
const tickersCol = document.getElementById("tickers-col");
const getPos = (el) => {
for (var lx=0, ly=0;
el != null;
lx += el.offsetLeft, ly += el.scrollTop, el = el.offsetParent);
return { x:lx, y:ly };
}
function mouseHover() {
const colPos = getPos(tickersCol);
console.log('colPos', colPos)
}
.container {
position: fixed;
font-family: Arial;
}
#tickers-col {
overflow-y: auto;
height: 400px;
}
li {
margin-bottom: 10px;
list-style: none;
padding: 5px 10px;
width: 120px;
color: white;
background: salmon;
border-radius: 4px;
cursor: pointer;
}
<div class="container">
<div id="tickers-col">
<ul>
<li onmouseenter="mouseHover()">aaa</li>
<li onmouseenter="mouseHover()">bbb</li>
<li onmouseenter="mouseHover()">ccc</li>
<li onmouseenter="mouseHover()">ddd</li>
<li onmouseenter="mouseHover()">eee</li>
<li onmouseenter="mouseHover()">fff</li>
<li onmouseenter="mouseHover()">ggg</li>
<li onmouseenter="mouseHover()">hhh</li>
<li onmouseenter="mouseHover()">iii</li>
<li onmouseenter="mouseHover()">jjj</li>
<li onmouseenter="mouseHover()">kkk</li>
<li onmouseenter="mouseHover()">lll</li>
<li onmouseenter="mouseHover()">mmm</li>
<li onmouseenter="mouseHover()">nnn</li>
</ul>
</div>
</div>
Let me know if this is what you wanted.

After you scroll the #tickers-col how do you get the correct updated top position of the div?
div itself isn't moving when scrolling, instead only its direct children are moving.
So top position is : #ticker-col's offsetTop - ul's scrollTop , and your js code should look like this:
(function(){
var tc = document.querySelector("#tickers-col");
tc.addEventListener("scroll",function(){
console.log("colPos:", { x : tc.parentNode.offsetLeft,
y : tc.parentNode.offsetTop - tc.scrollTop,
});
});
})();
.container {
position: fixed;
font-family: Arial;
}
#tickers-col {
overflow-y: auto;
height: 400px;
}
li {
margin-bottom: 10px;
list-style: none;
padding: 5px 10px;
width: 120px;
color: white;
background: salmon;
border-radius: 4px;
cursor: pointer;
}
<div class="container">
<div id="tickers-col">
<ul>
<li>aaa</li>
<li>bbb</li>
<li>ccc</li>
<li>ddd</li>
<li>eee</li>
<li>fff</li>
<li>ggg</li>
<li>hhh</li>
<li>iii</li>
<li>jjj</li>
<li>kkk</li>
<li>lll</li>
<li>mmm</li>
<li>nnn</li>
<li>ooo</li>
<li>ppp</li>
<li>qqq</li>
<li>rrr</li>
<li>sss</li>
<li>ttt</li>
<li>uuu</li>
<li>vvv</li>
<li>www</li>
<li>yyy</li>
<li>xxx</li>
<li>zzz</li>
</ul>
</div>
</div>
P.S.
onmouseenter="mouseHover()"
this thing looks ugly, if you need to set the same function for some number of elements > 2 as event listener the better approach would be like so
var collection =
Array.prototype.slice.call(
document.querySelectorAll('mycssselector')
).forEach(function(el){
el.addEventListener("myevent",/*callback*/function(){});
});

Detect data change from different DOM element

TL;DR: Detect item change from the actual <ul> list and persist the data
Howdy everyone?
I'm currently doing a Trello-like based web-application using PHP as a backend and jQueryUI as a front-end.
The front-end part is made using sortable(), by defining three UL elements. One is a container / wrapper with the id Nav and the other two are actual boards that hold the items.
Case scenarios are simple:
You can reorder boards
You can move order of items inside the single board
You can move item from one board to another
The included code supports all three of them but the data should persist to the back-end powered database (I'm currently on SQLite since the project is in early phase).
Problem
The method setSortAction currently detects all three use case but once you move the item from one board to another the order of the list can't be properly detected (since they are in incremented value).
Getting the bodyContent like this: action=updateMenuItemListings&record=2&record=1&record=3
by moving the second item to the first place in the board is fine, and I can persist that change through the POST request on back-end and then onto the database.
What happens when you move the first item from the second board on the first board? You'd get value of bodyContent similar to this:
action=updateMenuItemListings&record=1&record=2&record=1&record=3
As you can see the record with value 1 duplicates.
That means I can't detect the item moved is from the second board and I have duplicate items in the order of the board.
How would you go about designing this? Can it be done by the given code or have I totally missed the logic that one should apply in this scenario?
Thank you.
$(function() {
var debugMode = true;
$("ul.droptrue").sortable({
connectWith: "ul"
});
//Set common sort settings for all lists
$(".sortable").sortable({
opacity: 0.6,
cursor: 'move'
});
//Function used to configure update calls for each sort
function setSortAction(selector, updatePage, updateAction, itemLabel) {
$(selector).sortable({
update: function() {
var itemList = $(this).sortable(
"serialize", {
attribute: "id",
key: itemLabel
});
//Create POST request to persist the update
var bodyContent = "action=" + updateAction + "&" + itemList;
if (debugMode) {
alert("DEBUG: bodyContent = \n" + bodyContent);
}
//$.post(updatePage, bodyContent, function (postResult)
//{ alert(postResult); });
}
});
}
//Set sort update action for top level and second level
setSortAction(".navLevel1",
"reorder.php",
"updateMenuListings",
"record");
setSortAction(".navLevel2",
"reorder.php",
"updateMenuItemListings",
"record");
});
#import url( 'https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css' );
#sortable_1,
#sortable_2,
#sortable_3 {
list-style-type: none;
margin: 0;
float: left;
margin-right: 10px;
background: #eee;
padding: 5px;
width: 143px;
}
#sortable_1 li,
#sortable_2 li,
#sortable_3 li {
margin: 5px;
padding: 5px;
font-size: 1.2em;
width: 120px;
}
body {
font-family: Arial, Helvetica, sans-serif;
}
table {
font-size: 1em;
}
.ui-draggable,
.ui-droppable {
background-position: top;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<ul id="Nav" class="sortable navLevel1">
<ul id="sortable_1" class="droptrue navLevel2">
<li class="ui-state-disabled" style="opacity: 1; pointers-event: none; background: yellow">Classes</li>
<li id="item_1" class="ui-state-default">Some class</li>
<li id="item_2" class="ui-state-default">Another one!</li>
<li id="item_3" class="ui-state-default">Yep, thats enough</li>
</ul>
<ul id="sortable_2" class="droptrue navLevel2">
<li class="ui-state-disabled" style="opacity: 1; pointers-event: none; background: yellow">Presentation</li>
<li id="item_1" class="ui-state-default">Tom</li>
<li id="item_2" class="ui-state-default">Jessica</li>
<li id="item_3" class="ui-state-default">Kevin</li>
</ul>
</ul>
<br style="clear:both">

Unlike classes HTML ID's should be unique, in this way you can identify which items are from which columns.
Knowing for example that column one has 4 slots and column two has 6 would mean that a request array of 7,3,9,3,2,5,6,1,4,8,10 gets split into 4 and 6 hence
Column one: 7, 3, 9, 10,
Column two: 2, 5, 6, 1, 4, 8
$(function() {
var debugMode = true;
$("ul.droptrue").sortable({
connectWith: "ul"
});
//Set common sort settings for all lists
$(".sortable").sortable({
opacity: 0.6,
cursor: 'move'
});
//Function used to configure update calls for each sort
function setSortAction(selector, updatePage, updateAction, itemLabel) {
$(selector).sortable({
update: function() {
var itemList = $(this).sortable(
"serialize", {
attribute: "id",
key: itemLabel
});
//Create POST request to persist the update
var bodyContent = "action=" + updateAction + "&" + itemList;
if (debugMode) {
$('#report').text("DEBUG: bodyContent = \n" + bodyContent);
}
//$.post(updatePage, bodyContent, function (postResult)
//{ alert(postResult); });
}
});
}
//Set sort update action for top level and second level
setSortAction(".navLevel1",
"reorder.php",
"updateMenuListings",
"record");
setSortAction(".navLevel2",
"reorder.php",
"updateMenuItemListings",
"record");
});
#import url( 'https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css' );
#sortable_1,
#sortable_2,
#sortable_3 {
list-style-type: none;
margin: 0;
float: left;
margin-right: 10px;
background: #eee;
padding: 5px;
width: 143px;
}
#sortable_1 li,
#sortable_2 li,
#sortable_3 li {
margin: 5px;
padding: 5px;
font-size: 1.2em;
width: 120px;
}
body {
font-family: Arial, Helvetica, sans-serif;
}
table {
font-size: 1em;
}
.ui-draggable,
.ui-droppable {
background-position: top;
}
#report {
position: fixed;
font-size: 0.5em;
bottom: 2em;
left: 1em;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<ul id="Nav" class="sortable navLevel1">
<ul id="sortable_1" class="droptrue navLevel2">
<li class="ui-state-disabled" style="opacity: 1; pointers-event: none; background: yellow">Classes</li>
<li id="item_1" class="ui-state-default">Some class</li>
<li id="item_2" class="ui-state-default">Another one!</li>
<li id="item_3" class="ui-state-default">Yep, thats enough</li>
</ul>
<ul id="sortable_2" class="droptrue navLevel2">
<li class="ui-state-disabled" style="opacity: 1; pointers-event: none; background: yellow">Presentation</li>
<li id="item_4" class="ui-state-default">Tom</li>
<li id="item_5" class="ui-state-default">Jessica</li>
<li id="item_6" class="ui-state-default">Kevin</li>
</ul>
</ul>
<div id="report"></div>
<br style="clear:both">

Use Jquery for single select with mouse click and multiselect with CTRL + Click on the image inside a div

Having a situation here!
I have multiple images in a div. On click of the image, it should toggle something like select and de-select but, at a time only one image should be selected on Click event or none.
Now, when using CTRL+Click, I should be able to select/toggle other images also, something like multi-select.
Following is my code for single-select
jQuery toggleClass with single select on - on both left click and right click
$(document).on('click', '#snapshotsRpt img', function(e) {
e.preventDefault;
$('#snapshotsRpt img.htmlView_img_select_toggle').not(this).removeClass('htmlView_img_select_toggle');
$(this).toggleClass('htmlView_img_select_toggle');
});
$(document).on('mousedown', '#snapshotsRpt img', function(e){
if(e.which == 3){
e.preventDefault;
$('#snapshotsRpt img.htmlView_img_select_toggle').removeClass('htmlView_img_select_toggle');
$(this).addClass('htmlView_img_select_toggle');
}
});
This is what I tried doing for ctrl-click but something is not quite right.
$(document).on('click', '#snapshotsRpt img', function(e) {
e.preventDefault;
// To detect ctrl + click
if(e.ctrlKey) {
//alert("need to select multiple");
$(this).toggleClass('htmlView_img_select_toggle');
}
});
Any direction will be helpful. Thank you!

Here is the demo which will hek
$(document).ready(function () {
$(".selectOption").click(function (e) {
if (e.ctrlKey) {
$(this).toggleClass("selected");
} else {
if ($(this).hasClass("selected")) {
$(".selectOption").removeClass("selected");
} else {
$(".selectOption").removeClass("selected");
$(this).addClass("selected");
}
}
});
});
.selectOption{
height:30px;
width:30px;
background:red;
margin-bottom:2px;
}
.selected{
background:green;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="selectOption"></div>
<div class="selectOption"></div>
<div class="selectOption"></div>
<div class="selectOption"></div>
<div class="selectOption"></div>

May be this is not what you are expecting. But this could do the trick. **jQueryUI** has an interaction called **Selectable**
So the structure should be,
<ol id="selectable">
<li class="ui-state-default">1</li>
<li class="ui-state-default">2</li>
<li class="ui-state-default">3</li>
<li class="ui-state-default">4</li>
<li class="ui-state-default">5</li>
<li class="ui-state-default">6</li>
<li class="ui-state-default">7</li>
<li class="ui-state-default">8</li>
<li class="ui-state-default">9</li>
<li class="ui-state-default">10</li>
<li class="ui-state-default">11</li>
<li class="ui-state-default">12</li>
</ol>
CSS:
#feedback { font-size: 1.4em; }
#selectable .ui-selecting { background: #FECA40; }
#selectable .ui-selected { background: #F39814; color: white; }
#selectable { list-style-type: none; margin: 0; padding: 0; width: 450px; }
#selectable li { margin: 3px; padding: 1px; float: left; width: 100px; height: 80px; font-size: 4em; text-align: center; }
Script:
$(function() {
$( "#selectable" ).selectable();
});
A working Fiddle