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How to build a button to click on and play / stop an audio?

i want to build a image button, that plays an audio.
My Version works but when I want to use it more than once on a site, it only play one mp3, not the other ones.
My Code:
<audio loop="false" src="audio_01.mp3"> </audio>
<p><img alt="" class="hover_pic" src="image.png" style="width: 40%;cursor:pointer" /></p>
<script>
var aud = document.getElementById("ASong").children[0];
var isPlaying = false;
aud.pause();
function playPause() {
if (isPlaying) {
aud.pause();
} else {
aud.play();
}
isPlaying = !isPlaying;
}
</script></div>
and
<div id="BSong" onclick="playPause()" type="button">
<audio loop="false" src="audio_02.mp3"> </audio>
<p><img alt="" class="hover_pic" src="image.png" style="width: 40%;cursor:pointer" /></p>
<script>
var aud = document.getElementById("BSong").children[0];
var isPlaying = false;
aud.pause();
function playPause() {
if (isPlaying) {
aud.pause();
} else {
aud.play();
}
isPlaying = !isPlaying;
}
</script></div>
So you have an idea what the problem is that the button only play one of them on the website?

You are using the same variable names multiple times like aud, isPlayig, etc..
To solve this issue, you should declare only once the whole script and form the onclick="playPause()" send the id of the song you want to play.
Be aware if there is already some music which is playing.

It's hard to tell how your two current code snippets are arranged with respect to each other, but duplicating the code over and over every time you want to add another track is going to be unmaintainable. As it stands, the variables for isPlaying and aud probably overwrite each other, depending on how they're laid out, even if they're in different scripts. Using const or let instead of var and use strict; at the top of your script can help detect these aliases.
You could add closures around each one to keep them distinct, but a better approach is to write a loop (which also acts as a scoping closure) and dynamically add the listener to each element. For example:
const trackEls = [...document.querySelectorAll(".track")];
for (const trackEl of trackEls) {
const audioEl = trackEl.querySelector("audio");
trackEl.addEventListener("click", () => {
audioEl.paused ? audioEl.play() : audioEl.pause();
});
}
<div class="tracks">
<div type="button" class="track">
<audio src="https://upload.wikimedia.org/wikipedia/commons/d/d8/Bourne_woods_2020-11-18_0732.mp3"></audio>
<img alt="play track icon" src="http://placekitten.com/50/50" class="track-icon">
</div>
<div type="button" class="track">
<audio src="https://upload.wikimedia.org/wikipedia/commons/e/ea/Rapid-Acoustic-Survey-for-Biodiversity-Appraisal-pone.0004065.s017.ogg"></audio>
<img alt="play track icon" src="http://placekitten.com/50/50" class="track-icon">
</div>
</div>
Note that the above code lets multiple audio files play at once. If you want to stop all other audio elements when a new one is clicked and reset their time, you can do that with a loop or an extra variable that keeps track of the currently-playing track. For example:
const trackEls = [...document.querySelectorAll(".track")];
let currentTrack;
for (const trackEl of trackEls) {
const audioEl = trackEl.querySelector("audio");
trackEl.addEventListener("click", () => {
if (audioEl !== currentTrack) {
if (currentTrack) {
currentTrack.pause();
currentTrack.currentTime = 0;
}
currentTrack = audioEl;
}
audioEl.paused ? audioEl.play() : audioEl.pause();
});
}
<div class="tracks">
<div type="button" class="track">
<audio src="https://upload.wikimedia.org/wikipedia/commons/d/d8/Bourne_woods_2020-11-18_0732.mp3"></audio>
<img alt="play track icon" src="http://placekitten.com/50/50" class="track-icon">
</div>
<div type="button" class="track">
<audio src="https://upload.wikimedia.org/wikipedia/commons/e/ea/Rapid-Acoustic-Survey-for-Biodiversity-Appraisal-pone.0004065.s017.ogg"></audio>
<img alt="play track icon" src="http://placekitten.com/50/50" class="track-icon">
</div>
</div>
A few remarks on your code:
There's no need for isPlaying variables since audio elements already track their playing/paused state with audioElement.paused. If you track it in external state, you add further complication and room for bugs if your variable and the the audio element's state go out of sync.
Avoid putting a <script> in a <div>. <script> is usually a child of <body> or <head> (probably <body> in this case), after all of the HTML tags are closed.
onclick on an HTML element is generally poor practice. HTML should be structural, not behavioral. Similarly, style="width: 40%;cursor:pointer" should be moved to an external stylesheet and applied to a class.
.children[0]; is a brittle way to select the audio element in a track. If you wind up rearranging elements in the div, this code is liable to break. document.querySelector("#BSong audio") is more precise and robust to refactors, although using classes instead of ids enables easier dynamism so you don't have to type each track out by hand.
CSS classes are usually kebab-case, so hover_pic would be hover-pic.

Using getElementBy to control one element at a time

I am trying to have users click a play button, watch a case study video, and have the video go back to its original state once done playing. The issue is that when adding multiple case studies on one page the getElementById(), not only is invalid HTML, but it also plays the wrong case study video or it won't play at all.
I read online that getElementsByName or getElementsByClassName could be an alternative, but I can't get them to work.
Case study HTML block (this gets repeated on the page)
<div class="caseStudy">
<button id="playButton"></button>
<div id="casestudyPoster" class="caseStudy_poster"></div>
<iframe class="caseStudy_video" src="<vimeo-url-here>" width="100%" height="100%" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" webkitallowfullscreen mozallowfullscreen allowfullscreen>
</iframe>
</div>
JavaScript:
var poster = document.getElementById("casestudyPoster");
var button = document.getElementById("playButton");
poster.onclick = function() { fadeImage() };
button.onclick = function() { fadeImage() };
function fadeImage() {
poster.style.visibility = "hidden";
button.style.visibility = "hidden";
var iframe = document.querySelector('iframe');
var player = new Vimeo.Player(iframe);
player.play();
player.on('ended', function(data){
poster.style.visibility = "visible";
button.style.visibility = "visible";
});
}
How can I get this JavaScript to work with multiple caseStudys?

The issue is you are binding your JavaScript functionality to only one element, whereas you desire to bind your JavaScript functionality to multiple elements.
Here is an example of A) collecting several similar elements B) binding unique events to their unique properties.
// Gather all your similar elements
const videoElements = document.querySelectorAll( '.video-element' );
// For each element, let's do something with it.
videoElements.forEach( ( vidEl ) => {
// For this current element, lets create useful variables from elements found within it.
const playButton = vidEl.querySelector( '.play-button' );
const dynamicText = vidEl.querySelector( '.dynamic-text' );
// For this current element's play button, let's bind a unique event to it.
playButton.onclick = () => { dynamicText.innerHTML = `Video Playing!` };
} );
.video-element {
border: 1px solid;
margin: 1rem;
}
<div class="video-element">
<h2>Video 1</h2>
<button class="play-button">Play</button>
<span class="dynamic-text">I have my own functionality!</span>
</div>
<div class="video-element">
<h2>Video 2</h2>
<button class="play-button">Play</button>
<span class="dynamic-text">I have my own functionality!</span>
</div>
<div class="video-element">
<h2>Video 3</h2>
<button class="play-button">Play</button>
<span class="dynamic-text">I have my own functionality!</span>
</div>
<div class="video-element">
<h2>Video 4</h2>
<button class="play-button">Play</button>
<span class="dynamic-text">I have my own functionality!</span>
</div>

Trigger an event after clicking youtube play button

So im doing a site that before people enter another children site there will be a youtube video first.
When they click the play button, there will be a 15 second countdown then after the count down, the link or button will be appear [Visit here]
Here's a sample code I made: https://jsfiddle.net/aLq4mt69/13/
Problem here is that I don't know how stop the countdown first before clicking the play button
Another thing is that since autoplay isn't available on Mobile, I will not be doing that, I want just people click the play button then visit the page. Also I picked youtube because I need analytics on who will be viewing the video
<div class="video-wrapper">
<video class="video" id="bVideo" >
<source src="http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" type="video/mp4" />
</video>
<div id="playButton" class="playButton" onclick="playPause()"></div>
</div>
<div class="content">
<div>
Skip
</div>
</div>
<script>
var adVideo = document.getElementById("bVideo");
var SkipButton = document.getElementById("Skip");
var counter = 15;
var newElement = document.createElement("p");
newElement.innerHTML = "You can skip in 15 seconds.";
var id;
SkipButton.parentNode.replaceChild(newElement, SkipButton);
id = setInterval(function() {
counter--;
if(counter < 1) {
newElement.parentNode.replaceChild(SkipButton, newElement);
clearInterval(id);
} else {
newElement.innerHTML = "You can skip in " + counter.toString() + " seconds.";
}
}, 1000);

(Javascript) How can I make a mute button to mute my background music on click?

Right now on my site, (http://www.thehistoryofhiphop.net), I am trying to make my mute button functional. I want it to mute the background music that I have playing. How can I make it mute on click of the image?
Here's my html for the music:
<embed src="no_joke.mp3" loop="true" autostart="true" hidden="true" id="music"/>

embed tag has no muted attribute, so use audio tag.
and take this code:
<script>
function toggleSound() {
var elements = document.getElementsByTagName('audio');
for(var e = 0; e < elements.length; elements[e].muted = !elements[e].muted, e++);
}
</script>
<button onclick="toggleSound()">TOGGLE SOUND</button>
<audio
src="http://www.thehistoryofhiphop.net/no_joke.mp3"
preload="auto"
loop="true"
autoplay="true"
id="music">

Twitter Bootstrap Modal stop Youtube video

I'm very new to javascript and trying to use Twitter bootstrap to get a good looking website up and running quickly. I know this has something to do with jquery, but I'm not sure how to stop my video when I push the close button or the close icon.
Can someone explain how I can get my video to stop playing because even when I close the window, I can still hear it in the background.
<!-- Button to trigger modal -->
<img src="img/play.png">
<!-- Modal -->
<div id="myModal" class="modal hide fade" tabindex="-1" role=labelledby="myModalLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria>×</button>
<h3 id="myModalLabel">I am the header</h3>
</div>
<div class="modal-body">
<p><iframe width="100%" height="315" src="http:com/embed/662KGcqjT5Q" frameborder="0" allowfullscreen></iframe></p>
</div>
<div class="modal-footer">
<button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
</div>
</div>

I know I'm 2+ years late, but since then, a couple of things have changed, with B3 the new way to perform this out of the box is this:
$("#myModal").on('hidden.bs.modal', function (e) {
$("#myModal iframe").attr("src", $("#myModal iframe").attr("src"));
});
Have fun with Bootstrap!

There is a nice proper way of doing this - see the comments in the approved answer to this post.
Couldn't get that working first time round myself though, and was in a rush, so I did a rather horrible hacky bit of code which does the trick.
This snippet 'refreshes' the src of the embed iframe, causing it to reload:
jQuery(".modal-backdrop, #myModal .close, #myModal .btn").live("click", function() {
jQuery("#myModal iframe").attr("src", jQuery("#myModal iframe").attr("src"));
});

If someone still has the problem, try this, it worked for me:
$(document).ready(function(){
$('.modal').each(function(){
var src = $(this).find('iframe').attr('src');
$(this).on('click', function(){
$(this).find('iframe').attr('src', '');
$(this).find('iframe').attr('src', src);
});
});
});

Here is a simple way I've found for having a video play in a modal window, and then stop playing on close.
Use the .html to load the iFrame with your video into the modal-body, when the modal is shown, and then replace the modal-body with nothing when it is hidden.
$('#myModal').on('show', function () {
$('div.modal-body').html('YouTube iFrame goes here');
});
$('#myModal').on('hide', function () {
$('div.modal-body').html('');
});
Here is a jsfiddle example:
http://jsfiddle.net/WrrM3/87/

Here, I generalize #guillesalazar's answer.
This will reset any iFrame within any bootstrap modal (when the modal is closed):
$(function(){
$("body").on('hidden.bs.modal', function (e) {
var $iframes = $(e.target).find("iframe");
$iframes.each(function(index, iframe){
$(iframe).attr("src", $(iframe).attr("src"));
});
});
});
Add this to your layout and you're set.
UPDATE: Code modified for modals with multiple iFrames.

You should empty iframe src first and then set it up again.
So my working answer:
$('#myModal').on('hidden.bs.modal', function () {
var src = $(this).find('iframe').attr('src');
$(this).find('iframe').attr('src', '');
$(this).find('iframe').attr('src', src);
});
October, 2014. For Bootstrap 3.

Here is my solution, it solves the following using bootstrap event calls:
Autoplay movie when showing the modal
Stop movie when modal is hidden
HTML carousel inside modal, first active item is the iframe video
<button class="btn btn-primary" data-toggle="modal" data-target="#myModal">Modal</button>
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-body">
<div id="myCarousel" class="carousel slide carousel-fade" data-ride="carousel">
<div class="carousel-inner" role="listbox">
<div class="item active">
<div class="fill">
<iframe id="videoIframe" width="100%" height="100%" src="https://www.youtube.com/embed/UVAjm8b7YFg?rel=0&showinfo=0" frameborder="0" allowfullscreen></iframe>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
Javascript autoplay when displaying modal, then reset the URL and apply it to iframe src again
$('#myModal').on('show.bs.modal', function() {
$("#videoIframe")[0].src += "&autoplay=1";
});
$('#myModal').on('hidden.bs.modal', function(e) {
var rawVideoURL = $("#videoIframe")[0].src;
rawVideoURL = rawVideoURL.replace("&autoplay=1", "");
$("#videoIframe")[0].src = rawVideoURL;
});

This one does it perfectly:
$("#myModal").on("hidden.bs.modal", function(t) {
var o = $(t.target).find("iframe");
o.each(function(t, o) {
$(o).attr("src", $(o).attr("src"))
});
});
If you however want to have it start when modal opens / stop when it closes use this code:
But make sure to add enablejsapi=1 in your src, like this for example:
<iframe src="https://www.youtube.com/embed/YOUR_VIDEO_CODE?rel=0&controls=0&showinfo=0&enablejsapi=1" frameborder="0" allowfullscreen></iframe>
function playStopVideo() {
var youtubeFunc ='';
var outerDiv = $("#myModal");
var youtubeIframe = outerDiv.find("iframe")[0].contentWindow;
outerDiv.on('hidden.bs.modal', function (e) {
youtubeFunc = 'stopVideo';
youtubeIframe.postMessage('{"event":"command","func":"' + youtubeFunc + '","args":""}', '*');
});
outerDiv.on('shown.bs.modal', function (e) {
youtubeFunc = 'playVideo';
youtubeIframe.postMessage('{"event":"command","func":"' + youtubeFunc + '","args":""}', '*');
});
}
playStopVideo();

A much easier way than all of these answers is just replacing the whole src. This works for all modals and you can adjust iframe class as required.
$('.modal').on('hidden.bs.modal', function(e) {
var closestIframe = $(e.currentTarget).find('iframe');
var rawVideoURL = $("iframe")[0].src;
closestIframe[0].src = "";
closestIframe[0].src = rawVideoURL;
});

Reload any iframe in bootstrap modal on hide.bs.modal event.
The setTimeout delay added for fixing iframe rendering after src reset.
$('.modal').on('hidden.bs.modal', function (event){
let iframes = event.target.getElementsByTagName('iframe');
for (let i = 0; i < iframes.length; i++) {
let src_tmp = iframes[i].src;
iframes[i].src = '';
setTimeout(() => {
iframes[i].src = src_tmp;
}, 100);
}
});

I used a combination of Ruslanas Balčiūnas and Nathan McFarland's answers to code something that worked well for me.
$('#myModal').on('hide',function(){
$('.modal-body iframe').attr('src','');
});
So basically this sets the src attribute of the iframe to nothing when the close modal event is triggered. Short and sweet.

My solution to this that works for Bootstrap 3 and the modern YouTube embed format is as follows.
Assuming your video is embedded within a standard Bootstrap 3 Modal with id="#video-modal", this simple bit of Javascript will do the job.
$(document).ready(function(){
$("#video-modal").on('hide.bs.modal', function(evt){
var player = $(evt.target).find('iframe'),
vidSrc = player.prop('src');
player.prop('src', ''); // to force it to pause
player.prop('src', vidSrc);
});
});
I've seen proposed solutions to this issue involving use of the YouTube API, but if your site is not an https site, or your video is embedded using the modern format recommended by YouTube, or if you have the no-cookies option set, then those solutions don't work and you get the "TV set to a dead channel" effect instead of your video.
I've tested the above on every browser I could lay my hands on and it works very reliably.

Expanding on Guille's answer above, this is a drop-in function that will work with Bootstrap 3, the latest version of youtube as of Aug 14, and works for multiple videos /modals in one page.
$(".modal").on('hidden.bs.modal', function(e) {
$iframe = $(this).find( "iframe" );
$iframe.attr("src", $iframe.attr("src"));
});

Had a modal with many videos. Updated the code by #guillesalazar to close multiple videos in the modal.
$("#myModal").on('hidden.bs.modal', function (e) {
$("#myModal iframe").each(function () {
$(this).attr("src", '');
});
});

7 years after, we still need to solve this.
We found a best way to fix it (Inspired by RobCalvert123 answer)
jQuery(".modal-backdrop, .modal.open .close,.modal.open .btn").live("click", function() {
// Get iframe opened
var iframe_open = jQuery('.modal.open');
// Get src from opened iframe
var src = iframe_open.attr('src');
// replace src by src to stop it that's the tips
iframe_open.attr("src", src);
});

1. Embed Youtube on your Page (html)
Add the Youtube div-container to your Website:
<div id="ytplayer">This will be replaced with the Youtube iFrame</div>
Add the Youtube Javascript Api (iFrame)
<script>
// Ads Youtube JS API
var tag = document.createElement('script');
tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
// This function creates an <iframe> (and YouTube player) after the API code downloads.
var player;
function onYouTubeIframeAPIReady() {
player = new YT.Player('ytplayer', {
height: '390',
width: '640',
videoId: 'ncif63mSZl4',
WMode: 'transparent',
wmode: 'opaque',
playerVars: {
'autoplay': 0,
'controls': 0,
'autohide':1,
'rel':0,
'showinfo': 0,
'modestbranding': 1,
},
});
}
function stopVideo() {
player.stopVideo();
}
function pauseVideo() {
player.pauseVideo();
}
function playVideo(){
player.playVideo();
}
</script>
Controll with jQuery (Bootstrap Modal)
// Open Modal and start Playing Youtube Video
$("#myModalTrigger").click(function(){
$("#video-modal").modal(); // opens up the Modal
playVideo(); // Starts playing Video
});
// Stop Player on Modal hide
$('#video-modal').on('hide.bs.modal', function (e) {
stopVideo(); // stop player
});

$('#myModal').on('hide', function () {
$('#video_player')[0].stopVideo();
})

#guillesalazaar's answer was only the 1st half of my fix so I felt compelled to share my situation in case it helps someone in the future. I too have an embedded youtube video but I set mine to play automatically when the frame is loaded using autoplay=1. To get around the autoplay issue on page load I have my youtube url stored in a variable that sets the iframe source using a click handler. To solve this I simply removed the attribute source link:
My Url to trigger the modal window:
<div id="movieClick" class="text-center winner">
<a href="#" data-toggle="modal" data-keyboard="true" data-target="#movie">
</div>
My hidden modal window divs:
<div id="movie" class="modal fade" role="dialog" tabindex='-1'>
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">They Live (1988)</h4>
</div>
<div class="modal-body">
<iframe id="onscreen" width="100%" height="460px" src="" frameborder="0" allowfullscreen></iframe>
</div>
</div>
</div>
</div>
My JS:
$("#movieClick").click(function(){
var theLink = "https://www.youtube.com/embed/Wp_K8prLfso?autoplay=1&rel=0";
document.getElementById("onscreen").src = theLink;
});
// really annoying to play in the Background...this disables the link
$("#movie").on('hidden.bs.modal', function (e) {
$("#movie iframe").attr("src", '');
});

//stop youtube video on modal close
$('.modal').on('hidden.bs.modal', function () {
var iframVideo = $('.modal').find('iframe');
$(iframVideo).attr("src", $(iframVideo).attr("src"));
});

My solution for 2 or more Youtube videos using the HTML data-* attribute. The video autoplays and stops when the modal is opened and closed.
<button data-url="https://www.youtube.com/embed/C0DPdy98e4c" data-toggle="modal" data-target="#mymodal">Video 1</button>
<button data-url="https://www.youtube.com/embed/ScMzIvxBSi4" data-toggle="modal" data-target="#mymodal">Video 2</button>
<!-- Modal -->
<div id="mymodal" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-body">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">Close</button>
</div>
<div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>
</div>
</div>
</div>
</div>
$('.modal').on('show.bs.modal', function (event) {
$(this).find('iframe').attr("src", $(event.relatedTarget).data('url') );
});
$('.modal').on('hidden.bs.modal', function (e) {
$(this).find('iframe').attr("src", "");
});
Here is a Codepen demo:
https://codepen.io/danielblazquez/pen/oOxRJq

For angular or for dynamic html or if we have multiple iframes then use as below
$("#myModal").on('hidden.bs.modal', function (e) {
$("#myModal iframe").each(function(){
$(this).attr("src", $(this).attr("src"));
});
});

if you have multiple modals with many videos, let's say you have a modal on each slide on a carousel for instance, you need something more dynamic to close/stop the video in the visible slide and not mess up all the other modals, use this:
$(".modal").on('hidden.bs.modal', function (e) {
$(this).find("iframe").attr("src", $(this).find("iframe").attr("src"));
});