JS hover negative space between items - javascript

So I have a container with a grid of items and I want to be able to detect hover between rows. Not the individual items.
Its important to remember that the number of items, in the container and per row, will change.
My container of items currently looks like this
<div class="container">
<div class="hover-placeholder"></div>
<div class="row">
<!-- Start : Items -->
<div class="col-md-3">...</div>
<div class="col-md-3">...</div>
<div class="col-md-3">...</div>
<div class="col-md-3">...</div>
...
<div class="col-md-3">...</div>
<!-- End : Items -->
</div>
</div>
Preferably I DO NOT want to put a placeholder element every 4th item. Mainly because on smaller screens the number of items per row will reduce. This is why in my example above I have a single placeholder outside the grid that I want to transform: translateY(..) to the position between the hovered rows.
This is what I have currently: https://jsfiddle.net/0t8c0h4m/
Its nowhere near the result I am after but I have got to the point where I am overthinking it and getting stuck.
Any help would be great!
UPDATE
The goal for this functionality is when the user hovers the negative space, the .hover-placeholder will translate to that position and become visible. And when clicked will add a permanent separator between the rows.
SUCCESS!
I have solved my issue! Thank you all for your help.
Here is my solution: https://jsfiddle.net/0t8c0h4m/9/

I think that you are complicating stuff too much if you are only looking for the hover effect between the elements and nothing else.
Updated:
var offsets;
function get_offsets() {
offsets = {};
$('.card').each(function() {
var $this = $(this);
var card_offset = $this.offset().top;
offsets[card_offset] = {
ele: $this
};
})
}
get_offsets();
function get_last_ele(mouse_location) {
var element;
var previous_key;
$.each(offsets, function(key, obj) {
if (key > mouse_location && previous_key > 0) {
element = offsets[previous_key].ele;
return false;
}
previous_key = key;
})
return element;
}
$('.container').mousemove(function(e) {
if ($(e.target).parents('.row').length == 0) {
var last_item_row = get_last_ele(e.pageY)
console.log(last_item_row.text())
}
});
JSFiddle: https://jsfiddle.net/0t8c0h4m/6/
I'm only providing the code that gets the last item on the row before the space you are hovering. From there you can append the line or transition the placeholder the way you like it.

Please try with following script
(function($) {
'use strict';
// Count items per row
function items_per_row($collection) {
var count = 0;
$collection.each(function() {
var $this = $(this);
if ($this.prev().length > 0) {
if ($this.position().top !== $this.prev().position().top) {
return false;
} else {
count++;
}
} else {
count++;
}
});
var last = count ? $collection.length % count : 0,
rows = count ? Math.round($collection.length / count) : 0;
if (last == 0) {
last = count;
}
return {
count: count,
last: last,
rows: rows
}
};
// On card hover, print current row
$('.card').mouseenter(function() {
var $card = $(this);
var item_count = items_per_row( $('.card') ),
index = $(this).index(),
current_row = Math.floor(index / item_count.count) + 1;
$('pre').text( $card.find('.inner').text() + ' is in row '+ current_row );
});
$('.card').mouseout(function(){
$('pre').text('');
});
})(jQuery);

So I have come up with a solution to show dividers between each row using CSS. I just have been overthinking this issue.
I have added a dividing element after each item and with css nth-child() I can show specific dividers at each break point.
I have also added the grouping functionality I was aiming for.
Updated example: https://jsfiddle.net/0t8c0h4m/9/

Related

JQuery Filtering Using Bootstrap Columns

So I have this working fiddle: https://jsfiddle.net/p5ahob32/1/
$('#filter').keyup(function () {
var filter = $(this).val(), count = 0;
$('.col-md-3 a').each(function () {
// If the list item does not contain the text phrase fade it out
if ($(this).text().search(new RegExp(filter, "i")) < 0) {
$(this).fadeOut();
// Show the list item if the phrase matches and increase the count by 1
} else {
$(this).show();
count++;
}
});
// Update the count
var numberItems = count;
$("#filter-count").text("Number of Clients = " + count);
});
If you were to type 3 in the search box it would fade out all the other buttons except 3, however you will notice that the 3 button is all the way in the right because it is in a bootstrap column.
My question is how to I make it so that all the searched items will appear stacked nicely together at the top left?
Thank you!
get rid of all the rows except the outer one that wraps all the col's and hide parent of the <a>
$(this).parent().fadeOut();
//AND
$(this).parent().show()
DEMO
// change
$(this).fadeOut();
// to
$(this).parent().css("display","none");
// or
$(this).parent().fadeOut()

Multiple Functions with one Code

so I'm using this code, to slideToggle a box on my webpage.
// OPEN CERTAIN BOX
$(function() {
var sliding = false;
var mq = window.matchMedia( "(min-width: 700px)" );
if (mq.matches) {
var time = 500;
} else {
var time = 0;
}
var id = ('1');
var div = ('#toggle-content-' + id);
var img = ('#toggle-img-' + id);
var toggler = ('toggler-' + id);
$(div).hide()
$(toggler).click(function() {
if (sliding == false) {
sliding = true;
// Open / Close
$( div ).slideToggle(time,"swing");
// ...
As you can see, I'm using the var id, to use the toggle function for a certain box, which has its own css and html code.
I have 7 more boxes. Until now, i copied the code 7 times and changed the id at each copy from 2 - 8. Is there a way to make it with one code?
I tried a for loop, that goes from 1 - 8 but this obviously didnt work.
Has someone an idea? Or do I have to make that 8 copies and changed the id.
Edit:
My approach with the for-loop:
$(function() {
var sliding = false;
var mq = window.matchMedia( "(min-width: 700px)" );
if (mq.matches) {
var time = 500;
} else {
var time = 0;
}
for(i = 1; i <= 8; i++){
var id = (i.toString());
var div = ('#toggle-content-'+id);
var img = ('#toggle-img-'+id);
var toggler = ('toggler-'+id);
$( div ).hide()
$( toggler ).click(function(){
if (sliding == false){
sliding = true;
// Open / Close
$( div ).slideToggle(time,"swing");
...
And this is my html code for one box:
<tr><td cellspacing="0" cellpadding="0" height="50px" class="upper">
<toggler-1><area-head-text><img id="toggle-img-1" src="images/box_opener.png"/>Starterpaket</area-head-text></toggler-1>
</td></tr>
<tr><td>
<div id="toggle-content-1">
<area-head-text>
<img class="text-image" src="images/arrow.png"/>3 individuelle Entwürfe<br>
<img class="text-image" src="images/arrow.png"/>3 Korrekturzeichnungen<br>
<img class="text-image" src="images/arrow.png"/>Internationale Nutzungsrechte<br>
<img class="text-image" src="images/arrow.png"/>400€<br><br>
</area-head-text>
</div>
</td></tr>
I'm not sure why you put "Obviously" a loop doesn't work, because that's pretty much exactly what you should do. Something like this:
for(var i = 1; i <= 8; i++)
{
var div = $('#toggle-content-' + i);
var img = $('#toggle-img-' + i);
var toggler = $('toggler-' + i);
$(div).hide()
$(toggler).click(function() {
if (sliding == false) {
sliding = true;
// Open / Close
$( div ).slideToggle(time,"swing");
// ...
}
This is 2 options.
(and my preference) -
Instead of using an ID to add the click event onto each individual toggle button, use the same class on each, and add the click event on that class. When the user clicks a toggle button traverse the DOM from the clicked toggle button to perform your toggle on the relevant <div>.
This would look something like:
$(function() {
$('.toggleBtn').click(function() {
var sliding = $(this).data('sliding'); //use data attr to store sliding status
if (sliding == false) {
$(this).data('sliding') = true;
}else {
return; //don't toggle we're sliding
}
// navigate to element and toggle
$(this).parent('.someParentElement').children('.theDiv').slideToggle(time,"swing");
//clear sliding status
$(this).data('sliding', false);
}
}
The reason this is my preference, is because although it's faster to target an ID for a click event than a class for a single event, using 7 click events on 7 different IDS in my opinion (I don't know for sure) is less efficient than using a single click event on 1 class. That's my perceived purpose of using events on classes rather than IDS.
Also this way, when you want to add another box in, or remove a box, you don't need to modify any Javascript, the only thing you would need to maintain this code for is if you decide to change the structure of the HTML, and therefore the navigation of the DOM to perform your toggle.
using your method:
var ids = ["id1","id2","id3"];
for(var id in ids) {
var $div = $('#toggle-content-' + id);
var $img = $('#toggle-img-' + id);
var $toggler = $('toggler-' + id);
$div.hide()
$toggler.click(function() {
if (sliding == false) {
sliding = true;
// Open / Close
$div.slideToggle(time,"swing");
// ...
}

jQuery- counting articles in a row- it counts items from both boxes

I'm trying to count the articles in the top row of the two boxes on the page.
The boxes are separate and I want the count to be like that too -
function calculateArticlesInRow() {
var articleInRow = 0;
$('.promotionWrapper').each(function() {
console.log($(this).prev().length);
if($(this).prev().length > 0) {
console.log($(this).offset().top + '='+ $(this).prev().offset().top);
if($(this).offset().top != $(this).prev().offset().top){
return false;
}
articleInRow++;
}
else {
articleInRow++;
}
});
$('.result1').html('No: of articles in a row = ' + articleInRow);
}
setTimeout(function(){
calculateArticlesInRow();
}, 3000);
The problem I'm having however, is that the script is counting the articles in both boxes when only the articles with a certain top offset should be counted.
I have found other questions like this, but the all seem to use only one box.
Any help would be appreciated.
Here is a fiddle so you can see what I'm trying to do: https://jsfiddle.net/JackofD/de31nojn/
Thanks in advance
I think you should count the .promotionWrapper articles for each .productWrapper section.
i've updated your fiddle.
var articleInRow = 0,
maxArtNo = 0;
// cycle for every .productWrapper
$('.productWrapper').each(function (index, el) {
articleInRow = 0
// cycle for every .promotionWrapper in this .productWrapper
$('.promotionWrapper', el).each(function (innerIndex, innerEl) {
//your code
});
//set the count to the max
if (articleInRow > maxArtNo) maxArtNo = articleInRow;
});
// rest of your code
Try something like this:
$('.contentWrapper').each(function(){
//finds how many articles in the current container
console.log($(this).find('.promotionWrapper').length);
});
But to get each container individually, maybe you should put a separate class on each section tag instead.
You are counting all the sections with "promotionWrapper" class. To count the 1st row only, you need to select its parent section first and then count children of that. Here is the code:
$('.productWrapper:first').children('.promotionWrapper').each(function () {
console.log($(this).prev().length);
if ($(this).prev().length > 0) {
console.log($(this).offset().top + '=' + $(this).prev().offset().top);
if ($(this).offset().top != $(this).prev().offset().top) {
return false;
}
articleInRow++;
} else {
articleInRow++;
}
});
Sorry, my bad. Didnt see the jsfiddle.
Here is a working solution independent of your code:
var articlesInRow = [];
$('.productWrapper').each(function (index) {
articlesInRow[index] = $(this).find('.promotionWrapper').length;
$('.result' + (index+1)).html('No: of articles in row' + (index + 1) + ' = ' + articlesInRow[index]);
});
which i added to your calculateArticlesInRow function.
Please see updated jsfiddle:
https://jsfiddle.net/de31nojn/15/

How to reduce 180 lines of code down to 20 in Javascript?

I have a lot of click handler functions which are almost (textually and functionally) identical. I've got a menu with maybe 10 items in it; when I click on an item, the click handler simply makes one div visible, and the other 9 div's hidden. Maintaining this is difficult, and I just know there's got to be a smart and/or incomprehensible way to reduce code bloat here. Any ideas how? jQuery is Ok. The code at the moment is:
// repeat this function 10 times, once for each menu item
$(function() {
$('#menuItem0').click(function(e) {
// set 9 divs hidden, 1 visble
setItem1DivVisible(false);
// ...repeat for 2 through 9, and then
setItem0DivVisible(true);
});
});
// repeat this function 10 times, once for each div
function setItem0DivVisible(on) {
var ele = document.getElementById("Item0Div");
ele.style.display = on? "block" : "none";
}
Create 10 div with a class for marking
<div id="id1" class="Testing">....</div>
<div id="id2" class="Testing">....</div>
<div id="id3" class="Testing">....</div>
and apply the code
$('.Testing').each(function() {
$(this).click(function() {
$('.Testing').css('display', 'none');
$(this).css('display', 'block');
}
}
$(document).ready(function (){
$("div").click(function(){
// I am using background-color here, because if I use display:none; I won't
// be able to show the effect; they will all disappear
$(this).css("background-color","red");
$(this).siblings().css("background-color", "none");
});
});
Use .siblings() and it makes everything easy. Use it for your menu items with appropriate IDs. This works without any for loops or extra classes/markup in your code. And will work even if you add more divs.
Demo
Fiddle - http://jsfiddle.net/9XSJW/1/
It's hard to know without an example of the html. Assuming that there is no way to traverse from the menuItem to ItemDiv - you could use .index and .eq to match up the elements based on the order they match with the selector.
var $menuItems = $("#menuItem0, #menuItem1, #menuItem2, ...");
var $divs = $("#Item0Div, #Item1Div, #Item2Div, ...");
$menuItems.click(function(){
var idx = $(this).index();
// hide all the divs
$divs.hide()
// show the one matching the index
.eq(idx).show();
})
Try
function addClick(i) {
$('#menuItem'+i).click(function(e) {
// set nine divs hidden, 1 visble
for( var j = 0; j < 10; ++j ) {
var ele = document.getElementById("Item"+j+"Div");
ele.style.display = (i == j ? "block" : "none");
}
});
}
// One click function for all menuItem/n/ elements
$('[id^="menuItem"]').on('click', function() {
var id = this.id; // Get the ID of the clicked element
$('[id^="Item"][id$="Div"]').hide(); // Hide all Item/n/Div elements
$('#Item' + id + 'Div').show(); // Show Item/n/Div related to clicked element
});
Obviously this would be much more logical if you were using classes instead:
<elem class="menuItem" data-rel="ItemDiv-1">...</elem>
...
<elem class="ItemDiv" id="ItemDiv-1">...</elem>
$('.menuItem').on('click', function() {
var rel = $(this).data('rel'); // Get related ItemDiv ID
$('.ItemDiv').hide(); // Hide all ItemDiv elements
$('#' + rel).show(); // Show ItemDiv related to clicked element
});
Save the relevant Id's in an array - ["Item0Div", "Item1Div", ...]
Create a generic setItemDivVisible method:
function setItemDivVisible(visible, id) {
var ele = document.getElementById(id);
ele.style.display = visible ? "block" : "none";
}
And set your click handler method to be:
function(e) {
var arrayLength = myStringArray.length;
for (var i = 0; i < idsArray.length; i++) {
setItemDivVisible(idsArray[i] === this.id, idsArray[i]);
}
}
I think this will do the trick

Reduce textarea height based on its content

I'm able to increase textarea height as textrows add up (based on this question/answer: Adjust TD height depending on textarea rows).
Now, how do I reduce rows as I remove text? The answer above only adds rows.
If you want it more stable, you can count the linebreaks. So you can be sure that it set exactly the right number of rows:
$('.expand').on('keydown', function(e) {
if(13==(e.keyCode ? e.keyCode : e.which)) {
var rows = $(this).attr('rows');
var rowsNew = parseInt(rows) + 1;
$(this).attr('rows', rowsNew);
}
});
$('.expand').on('keyup', function (e) {
var lines = $('.expand').val().match(/\n/g);
var need = lines ? lines.length + 1 : 1;
var itis = $('.expand').attr("rows");
if(itis!=need) {
$('.expand').attr("rows", need);
}
});
Demo here: http://jsfiddle.net/efhYe/
But if you have jQuery already, you can also use this plugin: http://www.jacklmoore.com/autosize/

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