Develop Reference

JS toggle for multiple div elements

What should I do if I have multiple elements in HTML foreach and I need to make them all a toggle slider what opens div block with specific information about the element and I need to add close button too if a user wants to close the div. Sorry, I don't have any code to show because I did not find anything that suits my needs. The main idea is to have a product page with products that are displayed on a page using foreach... Then when you click on a product toggle div block is opened with information about a product. What should I search and what to use, I can't find anything because I am limited with my knowledge. Sorry for terrible English.

You can easily control the visibility of an element either within the div you're clicking or after it using a class you toggle. Here's an example controlling the div after one of the divs that controls the toggle:
document.getElementById("container").addEventListener("click", function(e) {
var toggleDiv = e.target.closest(".toggle");
if (toggleDiv && this.contains(toggleDiv)) {
toggleDiv.classList.toggle("closed");
}
});
.closed + .detail {
display: none;
}
<div id="container">
<div class="toggle closed">Product A</div>
<div class="detail">Details about Product A</div>
<div class="toggle closed">Product B</div>
<div class="detail">Details about Product B</div>
<div class="toggle closed">Product C</div>
<div class="detail">Details about Product C</div>
</div>
The key bits there are:
Hiding the details via CSS with the adjacent sibling combinator (+)
Toggling the class on the toggling div
I used event delegation to hook up the handler, but you could instead hook it up to each individual div if you preferred. Note that the Element#closest method I used is relatively new, you may need a polyfill or a loop on parentNode instead.

From what i have understood.
You need to toggle div elements using button tag and the button u click will show that particular div element.
<div id="container1" class={container1 ? "show" : "hide"}>
container1
</div>
<div id="container2"class={container2 ? "show" : "hide"}>
container2
</div>
<div id="container3"class={container3 ? "show" : "hide"}>
container3
</div>
and three button tags to call toggle function to show the three div element.
<div class="container">
<button name="container1" onclick=(toggle())>Container1</button>
<button name="container2" onclick=(toggle())>Container2</button>
<button name="container3" onclick=(toggle())>Container3</button>
</div>
toggle function
function toggle(e) {
if(e.target.name === 'container1'){
container1 = true;
}
else if(e.target.name === 'container2'){
container2 = true;
}
else if(e.target.name === 'container3'){
container3 = true;
}
}
css part
.show{
display: block;
}
.hide{
display: none;
}

Select items from different lists at the same time

This is the HTML I got to do a button click event to control selected items in more than one list.
$('#button').click(function(){
var $next = $('.section.selected').removeClass('selected').next('.section')
if ($next.length) {
$next.addClass('selected');
}
else {
$(".section:first").addClass('selected');
}
});
//On click I select next div with same class and remove selected from previous.
//How to loop? After 3 is selected, I want it to go to one again.
.selected { background:red }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="all">
<div class="section selected">ONE</div>
<div class="section">TWO</div>
<div class="section">THREE</div>
</div>
<div id="all">
<div class="section selected">ONE</div>
<div class="section">TWO</div>
<div class="section">THREE</div>
</div>
<br />
CLICK
However, because the items are using the same class name, at the end, the script can't decide which one is first / last item.
Can anyone give me an idea?

To get the items, use Queries like first-child, last-child and so on.
For more detals, Check jQuery API Documentation

Use this instead $(".section:first-child").addClass('selected') in your else condition

Hide div and show onclick using js

I've been trying to hide and show a div using javascript in my website.
But i want it to be hidden by default and be able to show and hide it on click.
My code seems okay and when I click the button, the display:none; turns into a display:block; but the div doesn't show…
Here's the HTML
<div class="col-lg-8 col-lg-offset-2 text-center">
<button href="#collapse1" class="nav-toggle">Show</button>
</div>
<div class="col-md-3 col-sm-4 col-xs-12 portfolio-item" id="collapse1" style="display:none">
<img src="img/myimage.jpg" class="img-responsive" />
</div>
Here's the JS
// Show or hides div
$(document).ready(function() {
$('.nav-toggle').click(function(){
//get collapse content selector
var collapse_content_selector = $(this).attr('href');
//make the collapse content to be shown or hide
var toggle_switch = $(this);
$(collapse_content_selector).toggle(function(){
if($(this).css('display')=='none'){
//change the button label to be 'Show'
toggle_switch.html('Show');
}else{
//change the button label to be 'Hide'
toggle_switch.html('Hide');
}
});
});
});
And here's the example on my website

I checked up your website and I can see that it changes state from "Show/Hide" on button as well as removing style or adds it to the div that is hidden, but however your image width and height is 0...
Perhaps like this ?
<img src="http://iampox.com/img/portfolio/Visuel_JPO_ESTEN_thumbnail#2x.jpg" class="img-responsive" alt="Visuel JPO ESTEN 2014" width="100%" height="100%" />
And here's simplified JS fiddle, since you asked "how to show/hide a div" in your question, so I used a button and hidden content just for sample demo. Perhaps you can minimize your script to something like this.
JS Fiddle Sample
$('#btn').on('click', function () {
var btnText = ($(this).text() == 'Show') ? 'Hide' : 'Show';
$(this).text(btnText);
$('#content').toggle();
});

hide all but one element of certain class in Jquery

I am trying to create an effect whereby clicking on a title toggles the corresponding content div. Clicking on another title while some content is showing should hide that content div and show the content div corresponding to the title just clicked.
However the code is not doing anything, as you can see on the following jquery: http://jsfiddle.net/dPsrL/
Any ideas?
HTML:
<div class="row title">
<div class="title" industry_id="education">Ed</div>
<div class="title" industry_id="tech">Tech</div>
<div class="title" industry_id="finance">Fin</div>
</div>
<br>
<br>
<div class="row content">
<div class="content" id="education">Education is great</div>
<div class="content" id="tech">Technology is awesome</div>
<div class="content" id="finance">Finance is super</div>
</div>
JAVASCRIPT:
$(document).ready(function () {
$('.content').hide();
});
('.title').on('click', function () {
var clicked = $(this).attr('industry_id');
alert(clicked);
$("#"+clicked).toggle(400);
$("#"+clicked).siblings().hide();
});

Instead of toggling the clicked element first and then hiding the others, why don't you just hide everything first and then show the clicked one? Saves you a check, and all you have to do is switch the order
$('.title').on('click', function () {
var clicked = $(this).attr('industry_id');
alert(clicked);
$('.content').hide();
$('#' + clicked).show(400);
});

Your attribute doesn't have the id selector in it. You need to do a string concatenation :
$('.title').on('click', function () {
var clicked = $(this).attr('industry_id');
alert(clicked);
$('#' + clicked).toggle(400);
$('#' + clicked).siblings().hide();
//The two last lines could be :
//$('#' + clicked).toggle(400).siblings().hide();
});
Also you have to remove the class content and title on the row since it trigger the click event and the hide part.
Here's a working fiddle : http://jsfiddle.net/dPsrL/3/

Typo on ('.title'). Should be $('.title'). Also, you should probably not give the container divs the same class as the child divs and then use that same class in your CSS and jQuery. It just makes selection more difficult.
jsFiddle example

Replace the same class div and has no ID

I have four DIVS, one is ready and the other three are still hidden. When the link to the second div is pressed, I want the second div to show up, and so for the next link.
The problem is, all the four DIV doesn't have ID and has the same class.
I just want it to automatically run without knowing what is the ID and the class of the div, or anything inside the div. It may look like a slideshow but on click function.
<p> link to the ready div </P>
<p> link to the second div </P>
<p> link to the third div </P>
<p> link to the last div </P>
<div id="wrapper">
<div> this is the div that is ready. This div has no ID and has the same class with others <div>
<div> this is the second div that is hidden. This div has no ID and has the same class with others <div>
<div> this is the third div that is hidden. This div has no ID and has the same class with others <div>
<div> this is the last div that is hidden. This div has no ID and has the same class with others <div>
</div>
FIDDLE

i have made a fiddle that might suite your case please have a look. You can make some modifications according to your needs.
var currentDiv = 0;
$(document).ready(function(){
$(".container div").click(function(){
$(".container div").eq(currentDiv+1).css( "display", "block" );
currentDiv++;
})
});
JSFIddle Link

Im pretty sure this is what you are looking for.
jQuery
$(".options p").click(function () {
var ourPick = $("p").index(this) + 1;
$(".container div:nth-child(" + ourPick + ")").show();
});
Demo Here
So what we are doing is getting the index for the link pressed and then using that to select the div we want to show (this is using :nth-child()).
Note: I have put a container around the links so you it doesn't pick up every p on the page.
If you want only one at a time you can just set them all to hide before showing one.
jQuery:
$(".options p").click(function () {
var ourPick = $("p").index(this) + 1;
$(".container div").hide();
$(".container div:nth-child(" + ourPick + ")").show();
});
Demo Here

JS FIDDLE DEMO
Explanation
<div class="parentDiv">
<div class="div">1</div>
<div class="div">2</div>
<div class="div">3</div>
<div class="div">4</div>
</div>
<div class="buttons">
<a idx="1">1</a>
<a idx="2">2</a>
<a idx="3">3</a>
<a idx="4">4</a>
</div>
$('.buttons a').click(
function(event)
{
var idx = $(event.target).attr('idx');
$('.div').hide(); //Hides all the divs
$('.parentDiv div:nth-child('+idx+')').show(); // Shows required div
}
);
DISADVANTAGE
If you will insert more contents, there is more work. Else no problem..
If you insert a div , you have to change all the links.
<div class="parentDiv">
<div class="div">1</div>
<div class="div">2.0 Inserted Div</div>
<div class="div">2</div>
<div class="div">3</div>
<div class="div">4</div>
</div>
<div class="buttons">
<a idx="1">1</a>
<a idx="2">2.0</a>
<a idx="3">2</a>
<a idx="4">3</a>
<a idx="5">4</a>
</div>
Not here , All the idx has to be changed. Since my code uses nth-child property
Edited
Updated Fiddle
Another Update