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PHP read more read less - Magento 2

I made an read more read less script for my Magento 2 webshop. This is used on a category page where there are serval subcategorie blocks to choose, each subcategory has a description with.
The problem: if I click read more all the descriptions of the subcategories will expand in stead of only the description of the subcategory I clicked read moreI am starting to learn PHP and Magento 2 but I can't fix this, does someone know the solution?
<div class="product description product-item-description">
<div class="more">
<?php if ($_subCategory->getDescription()) {
$string = strip_tags($_subCategory->getDescription());
if (strlen($string) > 250) {
// truncate string
$stringCut = substr($string, 0, 250);
$string = substr($stringCut, 0, strrpos($stringCut, ' ')).'... Lees meer';
}
echo $string;
?>
</div>
<?php
}else {?>
<?php /* #escapeNotVerified */ echo $_attributeValue;
}
?>
</div>
<div class="less" style="display:none">
<?php echo $_subCategory->getDescription(); ?>
Lees minder
</div>
<script type="text/javascript">
console.log('test');
require(["jquery"],function($){
$('.readmore').on("click",function(){
$('.less').show();
$('.more').hide();
});
$('.readless').on("click",function(){
$('.less').hide();
$('.more').show();
});
});
</script>
</div>

This is because, when you type $('.less').hide(); this is grabbing every element with the attribute class='less'. This is the way I would overcome this:
Start by attaching a unique attribute to each <div class="more"> or <div class="less"> - in this case, we use the class attribute: (and move 'more' or 'less' to an id)
<div id="read-more-block" class="cat-<?php echo $_subCategory->getId(); ?>">
<!-- my "read more" content -->
<a class="link" href="#read-more-block">Read Less</a>
</div>
<div id="read-less-block" class="cat-<?php echo $_subCategory->getId(); ?>">
<!-- my "read less" content -->
<a class="link" href="#read-less-block">Read More</a>
</div>
We now have a read-more-block and a read-less-block for each subcategory. When we click the inside link a jQuery event should fire which will hide itself and display the other.
And then, in your jQuery:
$('#read-more-block .link').on('click', function() {
var $readLessBlock = $('#read-less-block.' + $(this).parent().attr('class'));
$readLessBlock.show(); //Show the read less block
$(this).parent().hide(); //Hide the read more block
});
..and vice versa for read less.

Pass the value when a <div> has onclick function and the data inside is changing dynamically

enter image description hereThis is my index_category.php.
<?php
include("db.php");
$sql="SELECT * from tcategory";
$conect= mysqli_query($conn, $sql) or die ("Failed To Connect.");
while($rows= mysqli_fetch_array($conect, MYSQLI_ASSOC)){ ?>
<div class="dialog-outer" data="<?php echo $rows['cat_id']; ?>" onclick="openNav()">
<div class="dialog-inner">
<?php echo $rows['cat_nm'];?>
</div>
</div>
<?php }
?>
This is the side nav to which I want to pass the data of div
<div id="mySidenav" class="sidenav">
<h3 class="sub"><i class="fa fa-arrow-right" aria-hidden="true"></i><strong> Sub Category</strong></h3>
×
<div id="result">
<?php include("functions/sub_category.php")?>
</div>
</div>
<script>
function openNav() {
$("#mySidenav").attr("style","width:250px");
var id=$(".dialog-outer").attr("data");
alert(id);
$.post('functions/sub_category.php',{id: id},function(data){
$('#result').html(data);
});
}
function closeNav() {
$("#mySidenav").attr("style","width:0px");
}
</script>
The problem is it is taking data=1 only but in network it showing as data=1 data=2 data=3 so on...
How to pass all the values from div in index_category.php to script in index.php
as u can see in the image i want to filter the sub category based on category. But when i click on any of the category it is taking only first value.But when u look in the image(inspect element) it is taking all the values as data=1 data=2 so on...when i click on category i want to get their respective id's.

If I understand correctly your your outer nav is repeated, that means that your $(".outer-nav") will return an array of elements not just one. You will need to iterate over them to read their data attributes. If you are looking to get just one specific one I would recommend using JQuery(since you are using it) selector for the click detection and from there working out the .outer-nav that you need.
Sorry if I did not understand your question correctly, but you use a weird mixture of pure JS and JQuery so it is a bit stange to read the code.

as #Aurus told, it is not only one element. You should modify like this:
===== 1st method =====
.... onclick="openNav(this)">
and the function too:
function openNav(element) {
...
var id=$(element).attr("data");
.....
}
===== 2nd method =====
<div class="dialog-outer" data="<?php echo $rows['cat_id']; ?>" onclick="openNav('oid_<?php echo $rows['cat_id']; ?>')" id="oid_<?php echo $rows['cat_id']; ?>">
and the function too:
function openNav(id) {
...
var id=$("#"+id).attr("data");
.....
}

Display content based on id (from database, not html id)

Here is what I want to do. I have the following html displaying projects from by db.
<div class="col-md-5">
<ul class="todo-projects-container">
<li class="todo-padding-b-0">
<div class="todo-head">
<button class="btn btn-square btn-sm green todo-bold">Add Project</button>
<h3>Projects</h3>
<p>4 Waiting Attention</p>
</div>
</li>
<?php foreach ($projects as $project): ?>
<li class="todo-projects-item">
<h3><?php echo $project->project_name ?></h3>
<p><?php echo $project->project_body ?></p>
<div class="todo-project-item-foot">
<p class="todo-red todo-inline">Project #<?php echo $project->project_id ?></p>
<p class="todo-inline todo-float-r">32 Members
<a class="todo-add-button" href="#todo-members-modal" data-toggle="modal">+</a>
</p>
</div>
</li>
<div class="todo-projects-divider"></div>
<?php endforeach; ?>
</ul>
</div>
When I first load the page, the first project receives the class="active" (using jquery) and whenever a click a project it removes the active class from the previous li and adds to the clicked one. So far so good.
Now I need to display the following:
<ul class="todo-tasks-content">
<li class="todo-tasks-item">
<h4 class="todo-inline">
<a data-toggle="modal" href="#todo-task-modal">Welcome to the hotel California</a>
</h4>
<p class="todo-inline todo-float-r">Bob,
<span class="todo-red">TODAY</span>
</p>
</li>
<li class="todo-tasks-item">
<h4 class="todo-inline">
<a data-toggle="modal" href="#todo-task-modal">Talking 'bout my generation</a>
</h4>
<p class="todo-inline todo-float-r">Shane,
<span class="todo-red">TODAY</span>
</p>
</li>
</ul>
On the above html all the info is obviously static. I know how to make ajax calls to fetch info from my db. What I don't really know how to do is displaying the corresponding tasks according to project_id whenever I click on a project.
I assume I need to make an ajax call and return the data along with some html and then do something like (dummy syntax)
onclick(function() {
var tasksHTML = insert ajax call here
});
Not sure if this is the right approach, I'm new to js. Any suggestions?
UPDATE:
Here is a picture:
In the picture, there is an active (clicked) project and on the right are the tasks that have that project id. How do I change the tasks list when I click a project?

First we need to give javascript a way to get the id so it can pass it to the PHP file that gets the tasks.
I assume you're binding JQuery click to the <li> so also include a data attribute and call it projectid. Or add this data attribute wherever the click method is bound.
<?php foreach ($projects as $project): ?>
<li class="todo-projects-item" data-projectid="$project['id']">
//.................
<?php endforeach; ?>
If you are using JQuery do this in your .click method
$('.todo-projects-item').click(function(){
//Get your project id from the data-attribute
projectId = $(this).data('projectid');
//run your ajax
$.post('phpfile.php', {projectId:projectId}, function(r){
//your phpfile.php should echo a json of the tasks
//see example below
$('.class-of-the-task-div').html(r.html);
}, 'JSON');
});
your php file can be something like this
$r['html'] = '<ul class="todo-tasks-content">
<li class="todo-tasks-item">
//....................Stuff
</li>
</ul>';
echo json_encode($r);

Yii: TbCollapse multi link (href = #collapse and update status to be="1")

in this issue, i use booster widgets tbcollapse to make some like a inbox in message menu, unread or new message is have status 0, so when i click the panel title in collapse widgets, it will open div with id #collapse, and change the status in database to be 1 (readed), its possible??? how?
<?php $collapse = $this->beginWidget('booster.widgets.TbCollapse');
<div class="panel-group" id="accordion">
<?php for ($a = 0; $a<count($pesan); $a++){ ; ?>
<div class="panel panel-warning">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#collapse<?php echo $a ;?>">
<?php echo $pesan[$a]["sender"] ;?>
</a>
</h4>
</div>
<div id="collapse<?php echo $a ;?>" class="panel-collapse collapse">
<div class="panel-body">
<?php echo $pesan[$a]["message"] ;?>
</div>
</div>
</div>
<?php }; ?>
</div>

Just use bootstrap's collapse events to trigger an ajax call, for what you want probably the best option is the shown.bs.collapse event, for example:
$('#myCollapsible').on('shown.bs.collapse', function () {
//Get the id of the message and use ajax to update the database
});
Edit #1
A little example:
First add a custom id to your widget
<?php $collapse = $this->beginWidget('booster.widgets.TbCollapse',
array('id'=>"myCollapsible")
);?>
At the end of your view add a script tag, or you can register a script with yii's CClientScript. For the sake of simplicity I will use script tags
<script>
$(function(){
$('#myCollapsible').on('shown.bs.collapse', function (e) {
var target=$(e.target);//get shown element
if(target.attr('id')===$(this).attr('id'))return;//Event is fired on page load, ignore event on main collapse
$.post('controllerUrl',{messageId:$(e.target).attr("id")},function(data){//call server to update
//do something if everything was ok or display error
});
});
});
</script>
In your controller just add a method to update the message status
public function actionUpdateMessage{
MessageModel::model()->updateByPK($_POST['messageId'],'viewed'=>'1');//update the model whose id was sent, provide some validation if needed
return;//end processing
}
Hope this helps
Edit #2
In case you need to put more metadata for the ajax call, I recommend to use data attributes in your elements, so for example you could add an Id based on your database
<div id="collapse<?php echo $a ;?>" class="panel-collapse collapse"
data-messageId="<?php echo $pesan[$a]["id"] ;?>">
<div class="panel-body">
<?php echo $pesan[$a]["message"] ;?>
</div>
</div>
And in the javascript code you can retrieve the info with data method like the following
<script>
$(function(){
$('#myCollapsible').on('shown.bs.collapse', function (e) {
var target=$(e.target);//get shown element
if(target.attr('id')===$(this).attr('id'))return;//Event is fired on page load, ignore event on main collapse
$.post('controllerUrl',{messageId:$(e.target).data("messageId")},function(data){//call server to update
//do something if everything was ok or display error
});
});
});
</script>
Edit #3
If retrieving data attributes using jquery data method doesn't work, you still can access these attributes using attr method
$.post('controllerUrl',{messageId:target.attr("data-messageId")},function(data){//call server to update
//do something if everything was ok or display error
});
If the data attributes aproach doesn't work, you can also try with hidden fields like this:
Firs, instead of setting data-messageId attribute, add inside your panel-collapse div an input hidden like the following:
<div id="collapse<?php echo $a ;?>" class="panel-collapse collapse">
<input type="hidden" value="<?php echo $pesan[$a]["id"] ;?>"/>
<div class="panel-body">
<?php echo $pesan[$a]["message"] ;?>
</div>
</div>
Then, change the following in the javascript:
$.post('controllerUrl',{messageId:target.find("input").val()},function(data){//call server to update
//do something if everything was ok or display error
});

Need help making jQuery loop for basic .fadeIn()/.fadeOut() slider

I'm new to jQuery and am having trouble figuring out the right way to loop a set of code for a basic carousel/banner rotator. I've tried a few versions of "for" statements and .each(), but I can't get it to work on my own so I'm reaching out for help.
Here's my code so far:
$('.next-1').click(function () {
$('.featured-1').fadeOut(500,function(){
$('.featured-2').fadeIn(500,function(){
$('.featured-2').toggleClass("hide");
});
});
});
$('.next-2').click(function () {
$('.featured-2').fadeOut(500,function(){
$('.featured-3').fadeIn(500,function(){
$('.featured-3').toggleClass("hide");
});
});
});
And then a similar code block for going back within the slider:
$('.prev-2').click(function () {
$('.featured-2').fadeOut(500,function(){
$('.featured-1').fadeIn(500,function(){
$('.featured-2').toggleClass("hide");
});
});
});
$('.prev-3').click(function () {
$('.featured-3').fadeOut(500,function(){
$('.featured-2').fadeIn(500,function(){
$('.featured-3').toggleClass("hide");
});
});
});
This code does work right now, I just don't want to have to output so many unnecessary lines of code when I know I could loop it. I'd like to be able to loop until there are no more "featured-n" divs to cycle through (being able to cycle around to the beginning would be great too!)
Here's the PHP/HTML I'm using to generate each "featured-n" div block:
function home_slider_loop() {
$count = 0;
query_posts ('tag=slider');
if (have_posts()) : while (have_posts()) : the_post();
$count++;
?>
<div class="featured-post featured-<?php echo $count; if ($count>1) { echo ' hide';}?>">
<div class="featured-header">
<h1 class="featured-title"><?php the_title(); ?></h1>
<p class="author">Written by Evan Luzi</p>
</div>
<div class="image-wrap">
<?php the_post_thumbnail('full', array('class' => 'slider-image')); ?>
<div class="slider-nav">
<div class="featured-prev prev-<?php echo $count; ?>"></div>
<div class="featured-next next-<?php echo $count; ?>"></div>
</div><!--End Navigation-->
</div><!--End Image <?php echo $count; ?>-->
<div class="featured-footer">
<?php the_excerpt(); ?>
<a class="more-link" href="<?php the_permalink(); ?>" alt="<?php the_title(); ?>" >Read more</a>
</div>
</div><!--End Featured <?php echo $count; ?>-->
<?php
endwhile;
endif;
}
Here's a sample of one of the static HTML outputs (just imagine this iterated several times with the "featured-n" classes incrementing:
<div class="featured-1">
<div class="featured-header">
<h1 class="featured-title">5 Useful Cinematography Apps for iOS You Should Download Today</h1>
<p class="author">Written by Evan Luzi</p>
</div>
<div class="image-wrap">
<img width="1018" height="416" src="http://www.tbabdev.com/wp-content/uploads/2013/07/cinematography-apps-8-hero.jpg" class="slider-image wp-post-image" alt="cinematography-apps-8-hero" />
<div class="slider-nav">
<div class="featured-prev prev-1"></div>
<div class="featured-next next-1"></div>
</div><!--End Navigation-->
</div><!--End Image 1-->
<div class="featured-footer">
<p>The devices we have in our pockets, the ones that can run these apps, these are the new leathermans. They have everything we need. They eliminate the need to carry paper manuals and enable us to do complex timelapse calculations in a fraction of the time as a paper and pen.</p>
<a class="more-link" href="http://www.tbabdev.com/?p=27" alt="5 Useful Cinematography Apps for iOS You Should Download Today" >Read more</a>
</div>
</div><!--End Featured 1-->
You can see the code in action at http://www.tbabdev.com/
Thank you in advance for your help and please be kind to a n00b :)

Use something like this :
$('.nav .prev').click(function(){
activeBlock = $('.featured.active');
prevBlock = activeBlock.prev('.featured');
activeBlock.fadeOut('slow',function(){
prevBlock.fadeIn().addClass('active');
}).removeClass('active');
});
$('.nav .next').click(function(){
activeBlock = $('.featured.active');
nextBlock = activeBlock.next('.featured');
activeBlock.fadeOut('slow',function(){
nextBlock.fadeIn().addClass('active');
}).removeClass('active');
});
Html
<div class="nav">
<div class="prev"> </div>
<div class="next"> </div>
</div>
<div class="featured-post featured <?php if($count>1) echo 'hide' ?>">
<div class="featured-header">
<h1 class="featured-title"><?php the_title(); ?></h1>
<p class="author">Written by Evan Luzi</p>
</div>
<div class="image-wrap">
<?php the_post_thumbnail('full', array('class' => 'slider-image')); ?>
</div>
<!--End Image <?php echo $count; ?>-->
<div class="featured-footer">
<?php the_excerpt(); ?>
<a class="more-link" href="<?php the_permalink(); ?>" alt="<?php the_title(); ?>" >Read more</a>
</div>
</div>

You could do it this way :
$('.featured-next, .featured-prev').click(function () {
//find out if the clicked element is a prev or next element, extract the last part, will be useful later
var direction = $(this).hasClass("featured-next") ? "next" : "prev";
//select the ".featured-n" block which is the super-parent of clicked element
var $fullBlock = $(this).closest('div[class^="featured-"]'); //or add a class here to make your life easier
//fade out full block
$fullBlock.fadeOut(500, function () {
//search for the next element and show it
//note that $fullBlock.next() => $fullBlock["next"]() => $fullBlock[direction]()
$fullBlock[direction]().fadeIn(500, function () {
//toggle the class "hide" of the element next to fullBlock
$(this).toggleClass("hide");
});
});
});
Explanation:
You can join up both prev and next events together.
Then, you have to check if its a next or a prev element. Set that to a variable called direction. We'll be using this to find out if we have to use prev() or next() when we're trying to fadeIn featured-n divs.
Find the parent with the class set to featured-n (in your case its the superparent). It might be better if you give a common class to all these elements so that we can stop using 'div[class^="featured-"]' selector, which is slightly inefficient.
Fade out the superparent.
In the callback, based on the direction variable, we'll have to decide if the carousel is gonna go to prev block or next block, something like this :
if(direction === "prev")
{
$fullBlock.prev().fadeIn(//your code)
}
else
{
$fullBlock.next().fadeIn(//your code)
}
You must also know that, in an object like this :
var data = {"name" : "Blah Blah"}
To get the "Blah Blah" out, we can say
data.name
or we could say :
data["name"]
So based on this, in our situation, instead of
$fullBlock.prev()
Or we could say
$fullBlock["prev"]()
Which is what direction variable contains. So finally, we could do this to select the next/prev element based on what was clicked :
$fullBlockdirection
Show the prev/next element.
Add/remove "hide" class.
Hope this helped!