Develop Reference

Button click Triggers Text Below

I want to set up a functionality for a button that causes text to appear underneath it on click.
For example, when you click a button that says "Sign up now", text would appear underneath the button that says "Are you a member, yes or no?".
"Yes" and "No" would be links that bring you to a different page depending on how you answer.
My button code so far (just html and styling done):
<a href="/ticket-link" target="_blank" class="ticket-button">Sign Up
Now</a>
I'm new with this kind of functionality so any help would be greatly appreciated!
Thanks!

Adjust the href attribute as you want.
$('#btn').click(function() {
$('#modal').fadeIn();
});
a {
display: block;
text-decoration: none;
color: white;
background-color: #333;
width: 100px;
padding: 20px;
border-radius: 5px;
margin: 0 auto;
}
#modal {
width: 300px;
height: 120px;
background-color: #ccc;
border-radius: 5px;
margin: 0 auto;
display: none;
}
#modal h3 {
text-align: center;
padding: 10px;
}
#modal a {
width: 50px;
display: inline-block;
text-align: center;
margin: 0 auto;
height: 10px;
vertical-align: middle;
line-height: 10px;
}
.btns {
width: 200px;
margin: auto;
}
a:hover {
background-color: #666;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a href="/ticket-link" target="_blank" class="ticket-button" id='btn'>Sign Up Now</a>
<div id='modal'>
<h3>Are you a member?</h3>
<div class='btns'>
Yes
No
</div>
</div>

You could use the onClick function to unhide text, or elements, below it.
Sign Up Now
<span style="display:none;" id="text">This is some text :D</span>

simple way:
Sign Up Now
<script>
function confirmSignup(){
if(confirm("Are you sure?"))
{
window.location.href="http://somelocation.com/sign-up";
}
}
</script>

Like #Pety Howell said, you can use the onClick function to unhide the text. Here's a pretty straightforward way to do it with jQuery.
$(function() {
$('.link').on('click', function() {
$('.span').addClass('open');
});
});
.span {
display: none;
}
.open {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Click me
<span class="span">I'm hidden!</span>
Working fiddle: https://jsfiddle.net/3gr03yzn/4/

You could use jQuery toggle() function.
HTML :
<button id="member">
Are you Member ?
</button>
<div class="answer">
Yes<br />
No
</div>
JS :
$("#member").click(function() {
$(".answer").toggle();
});
CSS :
.answer {
display:none;
}
The working example on jsFiddle.
Hope this helps

Try this code.
please vote if this code helpful to you
function execute(){
var x = document.getElementById('link_list');
var y =document.getElementById('btn');
if(x.style.visibility==="hidden"){
y.style.visibility="hidden";
x.style.visibility="visible";
}
}
<button onclick="execute()" id="btn">sign up</button>
<div id="link_list" style="visibility:hidden">
Are you a member, <button onclick="window.open('http://sparrolite.blogspot.in')">Yes</button> or <button onclick="window.open('google.com')">no</button>
</div>

Most answers mentioned here either uses
jQuery or,
onclick attribute which is obtrusive javascript.
Here's how to achieve the desired behavior using vanilla, unobtrusive JavaScript.
window.onload = function() {
var button = document.querySelector('.ticket-button');
var info = document.querySelector('.info');
info.style.display = 'none';
var dispalyInfo = false;
button.onclick = function(e) {
e.preventDefault(); /* prevent page from navigating to a new page onclick */
if (dispalyInfo) {
info.style.display = 'none';
dispalyInfo = false;
} else {
info.style.display = 'initial';
dispalyInfo = true;
}
}
}
.ticket-button {
display: block;
}
Sign Up Now
<span class="info">Are you a member, yes or no?</span>
References:
Document.querySelector()
HTMLElement.style

show hide div from class name pure javascript

I am working on a video player that launches a video into an iframe within a div overlay. I want to avoid repetetive code such as onclick=() in every link, and want to avoid external libraries such as jQuery, because jQuery produces an unpleasant flickering screen when my video window is launched.
My problem is that with my work so far, only the first link opens the video overlay. I (somewhat) understand that the [0] indicates the first element in an array. Can an array contain an infinite numerical range, or is there a better way to accomplish my goal here? There will potentially be thousands of videos in these galleries, so listing them one at a time in my script is not practical.
I am still struggling to learn, so a working example would be greatly appreciated. Thanks
My work so far
https://jsfiddle.net/4oomb9rt/
example code
<!doctype html>
<html>
<head>
<title>Video Overlay</title>
<style>
body {
margin: 0;
font-family: arial;
}
#vidPlayer {
height: 100%;
width: 100%;
position: fixed;
z-index: 1;
top: 0;
left: 0;
background-color: #000;
overflow: hidden;
transition: 0.5s;
display: none;
color: white;
}
.closebtn {
position: absolute;
top: 7px;
right: 7px;
font-size: 50px;
}
.openbtn {
font-size: 30px;
}
.openbtn, .closebtn {
max-height: 48px;
max-width: 48px;
min-height: 48px;
min-width: 48px;
border-radius: 7px;
line-height: 12px;
}
.vidContent {
width: 100%;
text-align: center;
font-size: 32px;
}
</style>
</head>
<body>
<div id="vidPlayer">
<button class="closebtn">×</button>
<div class="vidContent">vidplayer content</div>
</div>
<button class="openbtn">☰</button>
<button class="openbtn">☰</button>
<button class="openbtn">☰</button>
<script>
function openNav() {
document.getElementById("vidPlayer").style.display = "block";
}
function closeNav() {
document.getElementById("vidPlayer").style.display = "none";
}
var opener = document.getElementsByClassName('openbtn')[0];
opener.addEventListener("click", function(e) {
openNav();
}, false);
var closer = document.getElementsByClassName('closebtn')[0];
closer.addEventListener("click", function(e) {
closeNav();
}, false);
</script>
</body>
</html>

You can iterate over element using ClassName and assign event listener.
for(var i=0;i<document.getElementsByClassName("openbtn").length;i++){
document.getElementsByClassName("openbtn")[i].addEventListener("click", function(e) {
openNav();
}, false);
}
Demo : https://jsfiddle.net/tj23hy3h/

You are on the right track. You want to make a few minor changes to your javascript.
var openers = document.getElementsByClassName('openbtn');
for(var i=0; i<openers.length; i++) {
openers[i].addEventListener("click", function(e) {
openNav();
}, false);
}
var closers = document.getElementsByClassName('closebtn');
for(var i=0; i<closers.length; i++) {
closers[i].addEventListener("click", function(e) {
closeNav();
}, false);
}
by iterating through all of your openers or closers you can add the listener to each one.

What you're problem is that you'll have to add you event listener to all of the elements of that type so something like this would work:
var opener = document.querySelectorAll('.openbtn');
Array.from(opener).foreach(function(opener_single){
opener_single.addEventListener("click", openNav, false);
});
and then the same theory for the closer elements.
what I'm doing here is I'm getting all elements with the class name of openbutton then looping through them in the loop i am then applying the click event listener in which runs the openNav function.

I am trying to display a div on click of a checkbox

I need to display an image and some info about the item when a checkbox is clicked. For some reason nothing is happening and I have been tweaking this for a while with no response whatsoever.
Here is my javascript:
<script type = "text/javascript">
function displayOnChecked(var checkboxID, var id) {
if(document.getElementById(checkboxID)) {
document.getElementById(id).style.display = "block";
} else {
document.getElementById(id).style.display = "none";
}
}
</script>
In the stylesheet I have it on display: none;
Here is one of my invocations:
<input type="checkbox" name="purchasedItem" id = "item" onclick="displayOnChecked('item', 'itemInfo');">

No need for the var keyword in the arguments list of displayOnChecked, just have the variable names alone.
If you look in your console, you should be getting an error: Uncaught SyntaxError: Unexpected token var

You don't intialize variables as function arguments:
function displayOnChecked(var checkboxID, var id)
should be
unction displayOnChecked(checkboxID, id)

You can achieve this, just using the CSS pseudo-element :checked:
.checkmeout {
display: none;
position: absolute;
top: 12px;
left: 150px;
width: 400px;
height: 100px;
padding: 12px;
color: rgb(255,255,255);
background-color: rgb(255,0,0);
}
.checkmeout img {
display: block;
width: 200px;
height: 50px;
background-color: rgb(0,0,255);
}
.checkme:checked ~ .checkmeout {
display:block;
}
<form>
<input type="checkbox" name="checkme" class="checkme" /> Check Me
<div class="checkmeout">
<img src="" alt="Check Me Out Image" />
<p>Check Me Out Text Description</p>
</div>
</form>

Need help changing z-index of an image

So, I am doing an assignment for my high school web design class, and I am having trouble getting the z-index of an image to change. There is supposed to be 2 images on top of each other. When you click the button on the page, the image on bottom will come to the top (or the top image will go to the bottom). Here is my code that I`m using:
The javascript
<script type="text/javascript">
function Switch()
{
document.getElementById("mononoke2").style.zIndex = "-1";
}
And here is the HTML
<div id="mononoke2">
<img src="mononoke2.png" alt="ashandsan">
</div>
<div id="mononoke3">
<img src="mononoke3.jpg" alt="sanandmoro" width="1234" height="694">
</div>
<button type="button" onclick="Switch()">Flippity Flip</button>
And the CSS
#mononoke2 {
margin-left: 0px auto;
margin-right: 0px auto;
display: block;
position: absolute;
z-index: 100;
}
#mononoke3 {
margin-left: 0px auto;
margin-right: 0px auto;
display: block;
position: relative;
left: 50px;
z-index: 20;
}

use jQuery.
$("#id").css("zindex","-1");

Change your JS function to this:
function Switch() {
var element = document.getElementById("mononoke2");
var style = window.getComputedStyle(element);
var index = style.getPropertyValue("z-index");
if(index > 0)
{
document.getElementById("mononoke2").style.zIndex = "-30";
}
else
{
document.getElementById("mononoke2").style.zIndex = "100";
}
}

Progress bar with slide ability

I am new to JavaScript/CSS (basically the whole world of web dev) and I am really struggling to create the following widget. I created a picture of what I want to make to make it more clear.
The Play/Pause and Stop button are ready. Loop checkbox is no problem. But the progress bar is painful. The two markers are supposed to mark the point from where the file would start playing and where it would stop. The progress bar is also supposed to be click-able, so if I want to access a certain point in time, then its possible.
What I tried so far
jQuery UI slider: For a sliding progress bar and use that draggable slider to access a certain point in audio file. Works fine. But no markers and looks really ugly. Don't how to change it.
<progress> tag: not very flexible. Marker? Clicking?
<div> tag: there seems to be no way to get the point where I clicked.
So, what do you guys recommend? How should I proceed?

Canvas Alternative
You might want to use a canvas and draw your own progress bar element within it.
Here are some canvas progress bar tutorials:
How to create a progress bar with HTML5
A progress bar using HTML5 canvas
Doing it with <progress>
To access the clicked position within a DOMElement, you can proceed with the click event's properties: clientX and clientY (MDN Source), like so:
HTML
<div class="marker" id="StartMarker">^</div>
<div class="marker" id="StopMarker">^</div>
<progress id="progress" value="0" min="0" max="100">0%</progress>
<form id="choice">
<button id="marker1">Beginning marker</button>
<button id="marker2">Ending marker</button>
<input type="hidden" id="markerValue" value="0" />
</form>
JavaScript (not optimized)
document.getElementById('progress').onclick = function (event, element) {
/* Math.floor((event.offsetX / this.offsetWidth) * 100) */
var newProgress = event.offsetX;
document.getElementById('choice').style.display = "block";
document.getElementById('markerValue').setAttribute('value', newProgress);
document.getElementById('marker1').onclick = function (event) {
event.preventDefault();
var newProgress = document.getElementById('markerValue').value;
var progressBar = document.getElementById('progress');
var startMarker = document.getElementById('StartMarker');
var stopMarker = document.getElementById('StopMarker');
var marker = startMarker;
marker.style.display = "block";
startMarker.style.display = "block";
startMarker.offsetTop = (progressBar.offsetTop + progressBar.offsetHeight + 2) + "px";
startMarker.style.left = newProgress + "px";
};
document.getElementById('marker2').onclick = function (event) {
event.preventDefault();
var newProgress = document.getElementById('markerValue').value;
var progressBar = document.getElementById('progress');
var startMarker = document.getElementById('StartMarker');
var stopMarker = document.getElementById('StopMarker');
stopMarker.style.display = "block";
stopMarker.offsetTop = (progressBar.offsetTop + progressBar.offsetHeight + 2) + "px";
stopMarker.style.left = newProgress + "px";
};
};
CSS
.marker {
position:absolute;
top:24px;
left:9px;
display:none;
z-index:8;
font-weight:bold;
text-align:center;
}
#StartMarker {
color: #CF0;
}
#StopMarker {
color:#F00;
}
#choice {
display:none;
}
progress {
display: inline-block;
-moz-box-sizing: border-box;
box-sizing: border-box;
width: 300px;
height: 20px;
padding: 3px 3px 2px 3px;
background: #333;
background: -webkit-linear-gradient(#2d2d2d, #444);
background: -moz-linear-gradient(#2d2d2d, #444);
background: -o-linear-gradient(#2d2d2d, #444);
background: linear-gradient(#2d2d2d, #444);
border: 1px solid rgba(0, 0, 0, .5);
border-radius: 15px;
box-shadow: 0 1px 0 rgba(255, 255, 255, .2);
}
Live Demo

Using simple blocks for that is possible. Your layout would look like this (simplified):
HTML
<div class="progressbar">
<div class="bar">
<div class="progress" style="width: 30%;">
</div>
</div>
<div class="markers">
<div class="right" style="width: 70%;">
<div class="marker">
</div>
<div class="left" style="width: 20%;">
<div class="marker">
</div>
</div>
</div>
</div>
</div>
SCSS
.progressbar {
width: 20em;
background: grey;
.bar {
height: 2em;
.progress {
background: blue;
height: 100%;
}
}
.markers {
height: 1em;
background: white;
.right {
height: 100%;
background: red;
.marker {
width: 1em;
height: 100%;
background: green;
position: relative;
float: right;
}
.left {
background: white;
height: 100%;
}
}
}
}
The operations can be quite difficult
jQuery
$('.bar').click(function(e){
$(this).find('.progress').css('width', (e.offsetX / this.offsetWidth)*100+'%');
});
will set the Progressbar properly on clicks.
For the markers though you will need mousedown, mousemove, mouseleave events, since you got 2 of them.
Example
http://jsfiddle.net/JXauW/