Develop Reference

Toggle or Show/Hide

I need help toggling overlays with multiple divs. I don't want to have a separate function for each one (there's 6 with 6 different overlay popups). The onclick div will reveal the overlay popup. Help is appreciated!
I need help toggling overlays with multiple divs. I don't want to have a separate function for each one (there's 6 with 6 different overlay popups). The onclick div will reveal the overlay popup. Help is appreciated!
function on() {
document.getElementById("overlay").style.display = "block";
}
function off() {
document.getElementById("overlay").style.display = "none";
}
#overlay {
position: fixed;
display: none;
width: 100%;
height: 100%;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: rgba(0,0,0,0.8);
z-index: 2;
cursor: pointer;
}
#text{
position: absolute;
top: 50%;
left: 50%;
font-size: 1rem;
color: white;
transform: translate(-50%,-50%);
-ms-transform: translate(-50%,-50%);
}
<!-- //DIV -->
<div class="row ">
<div class="col-md-6 col-lg-4 d-flex align-items-stretch" onclick="on()">
<div class="card mb-3">
<img src="img/ballet.jpg" class="embed-responsive w-100 classpic" alt="...">
<div class="card-body">
<h5 class="card-title">BALLET</h5>
</div>
</div>
</div>
<!-- //POPUP -->
<div id="overlay" onclick="off()">
<div id="text">
<h3>Ballet</h3>
<p>Ballet is an artistic dance form performed to music using precise and highly formalized set steps and gestures.
Classical ballet, which originated in Renaissance Italy and established its present form during the 19th century,
is characterized by light, graceful, fluid movements and the use of pointe shoes.
</p>
<h4>Shedule:</h4>
<p>Ages 4-8: Thursdays • 4PM<br>
Ages 9-14: Fridays • 7PM</p>
</div>
</div>

There's a problem with your approach, namely, when an element has display:none it is removed from the html tree and cannot receive a click event. Also, no two elements can share the same id attribute and so your function cannot be applied by reference to an id directly.
I've made a working snippet that achieves what I think you are after. There are undoubtedly others that would work but it's quite straight forward and works.
Firstly, arrange each of your alternative div pairs (one hidden, one visible) inside a parent div and give it a class name. This has the advantage that, if you size the container div appropriately, the content will not jump about when you swap the hidden div for visible and vice versa. Next, give classes to distinguish the (initially) hidden content from the visible div. Your markup pattern then will be repeats of:
<div class='container'>
<div class='main'>my first main content</div>
<div class='hidden'>my first hidden content </div>
</div>
In the style sheet, set the class display properties:
.hidden {
display: none;
}
.main {
display: block;
}
Then, set up a click event listener in javascript. This will take a click event from anywhere on the page.
document.addEventListener('click', event => {
})
inside the event listener, place an if block to test whether the click event was received by an element that was inside a div of .container class:
if (event.target.parentElement.className=='container') {
}
I slightly modified this, see edit note and bottom.
If the click event got that far, the click must have been recieved by the visible div inside that container (since the hidden one cannot receive click events and they are the only two elements present.
So you can go ahead and swap the classes applied to the visible div that received the click:
event.target.classList.add('hidden');
event.target.classList.remove('main');
You now have to do the opposite to the other div in the container class to make that sibling visible. The problem is, you don't know whether the hidden class was the first child, or the second child of the container div. What you do know for sure, is that the other div is a sibling of the div you just made invisible.
So we can test to see if there is a next sibling using a conditional:
if (event.target.nextElementSibling) {
event.target.nextElementSibling.classList.add('main');
event.target.nextElementSibling.classList.remove('hidden');
}
If the hidden div followed the visible one, a nextElementSibling will be found and the classes swapped. If no nextElementSibling was found, we know the other div had to come before the one we already hid.
so, an else extension of that if block can be added to switch the classes on the previousElementSibling:
...} else {
event.target.previousElementSibling.classList.add('main');
event.target.previousElementSibling.classList.remove('hidden');
} // end else;
And you're done!
I wanted to explain the logic in detail to make sure you know what's going on, but it's not that complicated.
The advantage of an approach like this is that the single event listener will cope with 1, 2, or 1,000 pairs of divs and none need any special IDs or anything other than an initial class of .main or .hidden (and that they be grouped inside a .container div.
document.addEventListener('click', event => {
if (event.target.parentElement && event.target.parentElement.className=='container') {
event.target.classList.add('hidden');
event.target.classList.remove('main');
if(event.target.nextElementSibling) {
event.target.nextElementSibling.classList.add('main');
event.target.nextElementSibling.classList.remove('hidden');
} else {
event.target.previousElementSibling.classList.add('main');
event.target.previousElementSibling.classList.remove('hidden');
} // end else;
} // end parentElement if;
}) // end click listener;
.hidden {
display: none;
border: 1px solid red;
margin: 5px;
}
.main {
display: block;
border: 1px solid black;
margin: 5px;
}
<div class='container'>
<div class='main'>my first main content</div>
<div class='hidden'>my first hidden content </div>
</div>
<div class='container'>
<div class='main'>my second main content</div>
<div class='hidden'>my second hidden content </div>
</div>
Edit the conditional to detect whether the parent element of the click event was a .container div was modified to check that the event target has a parent AND that the parent is a .container div. This prevents an error if a click is received anywhere outside of the container div.
** Displaying an Opaque Overlay in Response to Click **
Again, this solution allows the functionality to be applied to limitless div elements without the need for independent ids. Again, two classed .main and .hidden are used to decide which div has been clicked from a single event listener applied to the document rather than to multiple divs.
The basic process of displaying, and then re-hiding the (originally hidden) .overlay div is very simple:
if (element.className == 'main') {
element.parentElement.getElementsByClassName('overlay')[0].classList.remove('hidden');
}
if (element.className == 'overlay') {
element.classList.add('hidden');
}
However, a problem arises because of the use of class names, rather than ids. Namely, when the overlay is displayed, a click on it may be received by a descendent element that does not have the class name .hidden. To work properly, every descendent of the overlay div would have to be given the .hidden class and the class swapped applied for ever element inside the .hidden div. This could get very complicated if the div had many child elements (perhaps with their own descendents).
Instead, when a click is received, the target element is inspected to see if it has a relevant class (main or hidden). If it does, the script flows to the simple class switching blocks. If it has no, or a different class name however, a do-while loop examined the parent element of the click to see if it was contained in a relevant (main or hidden) class. The loop continues searching up the document tree until either a relevant element is found, or there are no more parent elements to examine.
If a parent is found to have the required class name, a reference to the element is passed onto the class switching block.
do {
if (element && (element.className == 'overlay' || element.className == 'main')) {
// foundElementClassName = element.className;
break;
} // end if;
if (element.parentElement) {
element = element.parentElement;
} else {
break;
}
} while (element.className != "overlay" || element.className != "main");
The following working snippet demonstrates the functionality. In it, three divs (coloured pink) have an associated (initially) hidden overlay div, while a fourth div has no associated overlay and should ignore clicks.
If a click is made on a pink div, it's specific overlay appears. A click anywhere on the overlay dismisses it, regardless of whether the click was received by the overlay div itself, or by a child element or deeper descendent (e.g. clicking on the text of the overlay (which is in a child h2 element still allows the correct .overlay div to have its styles switched to hide it again.
document.addEventListener('click', (event) => {
let element = event.target;
do {
if (element && (element.className == 'overlay' || element.className == 'main')) {
// foundElementClassName = element.className;
break;
} // end if;
if (element.parentElement) {
element = element.parentElement;
} else {
break;
}
} while (element.className != "overlay" || element.className != "main");
// end do-while loop;
// if a relevant element was found, the element object is stored in element variable;
if (element.className == 'main') {
element.parentElement.getElementsByClassName('overlay')[0].classList.remove('hidden');
}
if (element.className == 'overlay') {
element.classList.add('hidden');
}
}) // end click event listener;
.main {
display: block;
width: 50%;
margin: 10px;
border: 1px solid black;
background: pink;
}
.overlay {
position: absolute;
display: flex;
align-items: center;
justify-content: center;
top: 0px;
left: 0px;
width: 100%;
min-height: 100%;
bottom: auto;
z-index: 1;
background: rgba(255,255,0,0.7);
padding: 20px;
}
.hidden {
display: none;
}
.other {
display: block;
width: 50%;
margin: 10px;
border: 1px solid black;
background: yellow;
}
<div class="container">
<div class="main">Content of div 1. Content of div 1. Content of div 1. Content of div 1. Content of div 1. Content of div 1. Content of div 1. Content of div 1 </div>
<div class="overlay hidden"><h1>overlay for first pink div</h1> </div>
</div>
<div class="other">
some other content that doesn't have an associated overlay and that should ignore clicks.
</div>
<div class="container">
<div class="main">Content of div 2. Content of div 2. Content of div 2. Content of div 2. Content of div 2. Content of div 2. Content of div 2. Content of div 2. Content of div 2. Content of div 2.</div>
<div class="overlay hidden"><h1>overlay for SECOND pink div</h1> </div>
</div>
<div class="container">
<div class="main">Content of div 3. Content of div 3. Content of div 3. Content of div 3. Content of div 3. Content of div 3. Content of div 3. Content of div 3. Content of div 3. Content of div 3. </div>
<div class="overlay hidden"><h1>overlay for Third pink div</h1> </div>
</div>

CSS and JavaScript click on a button to create card elements

Say I have a blank page and a button (somewhere in the top right corner). When I click that button I want to be able to create a square on the page (A contact card). And when I click it again I want to be able to create another card next to it with the same dimensions and so on (i.e every click adds a card till theres 4 in a roll then starts on the bottom of the card untill whole page is filled).
I am unsure on how I can accomplish this. I know how to insert a button and a click event just not sure how I can structure this. Would I need to use flex?
Thanks in advance,

I am trying to visualize how I can tackle this problem.
Would I need to use flex?
In 2016, flex would be the best way to approach creating horizontal rows, each containing 4 equal-width elements, yes.
But if you want a legacy-browser solution, you can also use
display: inline-block;
float: left;
width --px;
and a container with an explicitly specified width which means that every :nth-of-type(4n+1) element will start on a new row.
For instance:
.card {
display: inline-block;
float: left;
width: 100px;
margin: 12px;
}
means each card requires 124px of space (12px + 100px + 12px).
So if you give the .card-container an explicit width of 4 x 124:
.card-container {
width: 496px;
}
then after every 4 cards, the next card will begin on a new row.

Here's a quick prototype using jQuery and Twitter Bootstrap.
When pressing the button, the first card with class card-hidden is shown and has it's card-hidden class removed. The next button press will show the next card until there's no cards left.
HTML
<html>
<body>
<button id="button">Add</button>
<div class="container">
<div class="row">
<div class="card card-hidden col-xs-3">1</div>
<div class="card card-hidden col-xs-3">2</div>
<div class="card card-hidden col-xs-3">3</div>
<div class="card card-hidden col-xs-3">4</div>
</div>
</div>
</body>
</html>
CSS
.card {
height: 200px;
}
.card-hidden {
display: none;
}
JS
$("#button").on("click", function(e) {
if ($(".card-hidden").length > 0) {
$(".card-hidden").first().slideToggle(function() {
$(this).removeClass("card-hidden");
});
} else {
console.log("No more cards to show.");
}
});

Floating visible div inside horizontal scrollable div CSS

The issue is the following :
I have a calendar in which the user can create an appointment (using DHTMLX Scheduler Timeline View), the main problem is the Scheduler doesn't support a scrollable view , only fits the schedule into the view.
I Solve the previous problem, creating a div with a FIXED width (in this way can i have a longer horizontal scheduler ) and wrapping it inside a div that allows to scroll horizontally its content.
However , I dont have a clear idea of how to solve the following problem caused :
When the calendar is loaded , you can see which div belongs to its horizontal Row
And when the user scrolls horizontal (to see 7:00 PM for example)
You cannot see in which div with color you need to create the appointment !
So i need something like this, where the div is still visible although the user scrolls horizontally :
I already tried with something like the following :
May be a problem too with the parent container, because it hides the div if the following works maybe ?
.visible-division{
position:relative; /*Because the div with color is inside a table, and i need that still floating in the same row !!*/
float:left;
z-index:9000;/*a higher z-index in case something cover the div*/
}
without any luck ..
My CSS
#calendar-container{
width: 2000px;
}
#calendario {
height: 900px;
width: 100%;
border: 1px solid #cecece;
}
.scrolling_container {
height: 100%;
overflow: auto;
}
And my Markup
<div class="scrolling_container">
<div id="calendar-container">
<div class="dhx_cal_container panel" id="calendario">
<div class="dhx_cal_navline">
<div class="dhx_cal_prev_button"> </div>
<div class="dhx_cal_next_button"> </div>
<div class="dhx_cal_today_button"></div>
<div class="dhx_cal_date"></div>
<div class="dhx_cal_tab" name="day_tab"></div>
<div class="dhx_cal_tab" name="week_tab"></div>
<div class="dhx_cal_tab" name="month_tab"></div>
<div class="dhx_cal_tab" name="timeline_tab" style="right:280px;"></div>
</div>
<div class="dhx_cal_header"></div>
<div class="dhx_cal_data"></div>
</div>
<div class="well text-right">
<div>
a link
</div>
</div>
</div>
It can be solved via CSS ? Otherwise, Should I apply classes to it in case of scroll event ?
Any help is appreciated, thanks !

This may help you do the trick.
.visible-division{
position:fixed;
width: /* specifiy */
height: /* specify */
top: /* specify */
left: /* specify */
}
.scrolling_container {
height: 100%;
overflow: auto;
}
Though not supported by most browser, you may try sticky position value position: sticky.

Hope this will be helpful, apply this class to the floating div only.
.floating{
position:fixed;
top:20px;
right:0px;
width:80%; /* as required */
}

Aligning numbers at decimal point angular ui grid

I am looking at aligning numbers on the decimal point in Angular UI Grid like below.
11.293
.89
233424
.34345
I have had a few ideas including a cell template with three aligned divs and using transparent 0s.
Has anyone had any luck with this.

I think that the best way is to select all the numbers with Javascript, then break them and encapsulate them in 2 span elements like this:
<div>
<span class="int">11.</span><span class="float">293</span>
</div>
<div>
<span class="int">233424.</span><span class="float">89</span>
</div>
Then you can assign a with to the elements and align the .int to right and .float to the left with css:
.int, .float{
display: inline-block;
width: 100px;
}
.int{
text-align: right;
}
.float{
text-align: left;
}
This way the selection is ok and div and span doesn't disturb the meaning of your html5 code. Also, you do not deppend on a fixed width font.
Hope this works, if not, please let me know.

In my component.ts file I added a method splitNumbers, which converts each number into a array with the integer and fractional part:
splitNumbers() {
return this.numbers.map(number => {
let str = number.toString();
return str.split(".");
});
}
In my component.html I added separate <span> elements to the integer and fractional parts. Don't use whitespace between the tags unless you want extra whitespace in your output:
<li *ngFor="let parts of splitNumbers()">
<span class="integer">{{ parts[0] }}</span>.<span class="fractional">{{ parts[1] }}</span>
</li>
Then in the CSS I set the integer part to inline-block, give it a width and make it align right:
.integer {
text-align: right;
width: 10em;
display: inline-block;
}
The result:
As you can see the last number is very small and written in scientific notation instead of expanded. So this doesn't work perfectly.

Make text in paraghapghs in div overflow instead of new lines

Say I have several pretty longs lines in a paragraph:
<div style="overflow: auto">
<p>
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccc
</p>
<p>
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccc
</p>
</div>
and window width less that width of the pahagraph (a's + b's + c's). Currently scroll will appear only if width of any of components (a, b, or c) is more that width of the window and over components are carried to the new lines. I want contents of each paragraph appear on the same line with a scroll. How can I treat each paraghaph as a string, so contents of the paragraph is treated like a single line?

With CSS you can do:
p {
white-space: nowrap;
overflow: auto
}
This make the spaces non-breaking, so the paragraph will all be on one line.

You can set white-space:nowrap and overflow:auto property of css. You can assign a class to paragraph tag for which you want text on single line.
CSS
.className {
white-space: nowrap;
overflow: auto;
}
Html
<div style="overflow: auto">
<p class="className">
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccc
</p>
<p class="className">
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccc
</p>
</div>

Either add styles as below
p{
overflow:auto;
white-space: nowrap;
}
or use jQuery as below
$('p').css('overflow','auto');
$('p').css('white-space','nowrap');
Here is a live fiddle example http://jsfiddle.net/mayooresan/qmCwL/