I have the following JavaScript code that work great when I hover over a video. I like how the start and stop is broken into functions and it allows me to customize the hover play exactly how I want. However, this code only works on the first video on the page and I have several videos that are loaded on the page dynamically.
I would like to modify this code so that it will work on all videos on the page. I'm thinking that maybe the functions need to be called inside a loop? I'm not sure as I do not know JavaScript well, so any help on how to modify this code would would be much appreciated!
const video = document.querySelector("video");
function startPreview() {
video.muted = true;
video.currentTime = 5;
video.playbackRate = 2.5;
video.play();
}
function stopPreview() {
video.currentTime = 5;
video.playbackRate = 1;
video.pause();
}
let previewTimeout = null;
video.addEventListener("mouseenter", () => {
startPreview();
previewTimeout = setTimeout(stopPreview, 3000);
});
video.addEventListener("mouseleave", () => {
clearTimeout(previewTimeout);
previewTimeout = null;
stopPreview();
});
You can do event delegation to handle all videos. So:
document.body.addEventListener('mouseenter', (event) => {
if (event.target.matches('video') {
// start playing
}
});
More on the matches() method on MDN.
You would also modify the start and stop methods to take the video element as a parameter:
function startPreview(video) {
video.muted = true;
video.currentTime = 5;
video.playbackRate = 2.5;
video.play();
}
And pass them the event.target.
Related
I am working on my portfolio site to make it more ADA compliant when I noticed a lot of redundant code that I want to optimize. I have seven videos on the screen and each have a onmouseover and onmouseout event attributes. I wanted to create a JavaScript that just assigned these event handlers to all video tags on the screen in one function run on startup.
This worked using html code
<video class="nlm-marque-video" id="aerialVideo">
<source src="videos/aerial-view-of-san-diego.mp4"
onmouseover = "playVid(this);"
onmouseout ="pauseVid(this);"
type="video/mp4">
</video>
<script>
/*
* get reference of all video tags on page
* set the video attributes to same defaults
* start videos automatically the first time with muted
*/
function videoEnhance(){
let vid = document.getElementsByTagName("video");
for (i=0;i<vid.length; i++) {
vid[i].autoplay = true;
vid[i].muted = true;
vid[i].controls = true;
vid[i].addEventListener("onmouseover", playVid(this));
vid[i].addEventListener("onmouseout", pauseVid(this));
}
}
/*
* function to play video event
*/
function playVid(vidObj) {
vidObj.play();
console.log("video is playing");
}
/*
* function to pause video on event
*/
function pauseVid(vidObj) {
vidObj.pause();
console.log("video is paused");
}
</script>
index.php:346 Uncaught TypeError: vidObj.play is not a function
at playVid (index.php:346)
at videoEnhance (index.php:338)
at onload (index.php:24)
playVid # index.php:346
videoEnhance # index.php:338
onload # index.php:24
The videos runs, but do not respond to the mouseover and mouseout events.
I think that your simplest solution would probably be to just use the event to play and pause things.
function videoEnhance(){
let vid = document.getElementsByTagName("video");
for (i=0;i<vid.length; i++) {
vid[i].autoplay = true;
vid[i].muted = true;
vid[i].controls = true;
vid[i].addEventListener("mouseover", playVid); //Don't pass in param here.
vid[i].addEventListener("mouseout", pauseVid); //Or here
}
function playVid(e) {
e.target.play(); //use the event
console.log("video is playing");
}
function pauseVid(e) {
e.target.pause(); //use the event
console.log("video is paused");
}
}
Edit 2: Here is the working code. Many thanks to Piotr for his help I couldn't have done it so effortlessly without you guys.
sceneEl.querySelector('a-sound').setAttribute('sound', {src:url3});
let playing = false;
var el = document.querySelector('a-box');
let audioEl = document.querySelector("a-sound");
var audio = audioEl.components.sound;
el.addEventListener('click', () => {
if (!playing) {
audio.playSound();
} else {
audio.stopSound();
}
playing = !playing;
})
} );
request.send( null );
}
});
Edit: I've got the sound playing from a dynamic URL (in my JSON file), but I cant seem to get the event listener function right (for playing / pausing on click).
sceneEl.querySelector('a-sound').setAttribute('sound', {src:url3});
let audioEl = document.querySelector("a-sound");
let audio = audioEl.components.sound;
sceneEl.querySelector('a-box').addEventListener('click', function () {
if(!playing) {
audio.play();
} else {
audio.pause();
audio.currentTime = 0;
}
playing = !playing;
});
} );
request.send( null );
}
});
Original: I'm using this component in A-Frame, but I'm looking to play the sound from the src in the ('a-sound') entity rather than from the asset link. The reason is because I'm loading the sound files dynamically from a JSON array so they don't exist in any list of assets. I've got all my files loading but am having trouble getting this component to hook into my loaded sceneEl.querySelector('a-sound').setAttribute('sound', {src:url3}); code. I'm thinking its just a small syntax issue but I'm not 100% sure. Could someone please look over this for a minute and tell me if its doable? This is the code (same as the link except for the (a-sound) within the querySelector.
AFRAME.registerComponent('audiohandler', {
init:function() {
let playing = false;
let audio = document.querySelector('a-sound');
this.el.addEventListener('click', () => {
if(!playing) {
audio.play();
} else {
audio.pause();
audio.currentTime = 0;
}
playing = !playing;
});
}
})
</script>
Using the <a-sound> You must handle things a bit differently.
playing / stopping the sound should be done within the sound component. You need to access it via yourEntityName.components.sound and use the playSound() and stopSound() methods.
check it out on my glitch. I set the source via the setAttribute(), and make a play / stop button.
My <a-sound> has a geometry to be a button, but You can make a <a-sound> entity, and use it like this:
let audioEl = document.querySelector("a-sound");
audioEl.setAttribute("src", "sourceURL");
let audio = audioEl.components.sound;
// play = audio.playSound();
// stop = audio.stopSound():
Furthermore, there are many issues with the nodes not being fully loaded. Check out this example:
<a-entity component></a-entity>
<a-sound></a-sound>
If the component tries to grab a reference to the document.querySelector("a-sound").components.sound, it may be undefined. If so, You should try to wait until it emits the loaded signal.
I've been messing with video.js whilst learning javascript but can't seem to figure out how to make the video pause after a certain time has passed.
myPlayer.play(function(){
whereYouAt = myPlayer.currentTime();
if (whereYouAt == 10) {
myPlayer.pause();
}
})
That is my pause code.
Check the currentTime in the timeupdate event callback:
var pausetime = 2; // stop at 2 seconds
var myPlayer = videojs('example_video_1');
myPlayer.on('timeupdate', function(e) {
if (myPlayer.currentTime() >= pausetime) {
myPlayer.pause();
}
});
myPlayer.play();
JSFiddle demo: http://jsfiddle.net/EdjxN/17/
I want the user to have the option to skip the preroll ad after a specified time (say 5 secs into the ad). Then the normal video would play. How can I achieve this? Currently I have something inline of this:
var adManager = function () {
var adSrc = url,
src = "http://media.w3.org/2010/05/sintel/trailer.mp4";
var adEnded = function () {
videoPlayer.removeEventListener("ended", adEnded, false);
videoPlayer.removeEventListener("playing", adPlaying, false);
$("#companionad").hide();
videoPlayer.src = src;
videoPlayer.load();
videoPlayer.play();
console.log(videoPlayer.currentTime);
};
var adPlaying = function () {
var companionad = $(responseXML).find("HTMLResource").text();
$("#companionad").html(companionad);
console.log(videoPlayer.currentTime);
}
return {
init: function () {
videoPlayer.src = adSrc;
videoPlayer.load();
videoPlayer.addEventListener("ended", adEnded, false);
videoPlayer.addEventListener("playing", adPlaying, false);
if (videoPlayer.currentTime > 5) {
$("#skip").show();
}
console.log(videoPlayer.currentTime);
}
};
}();
adManager.init();
What I am trying to do is:
if (videoPlayer.currentTime > 5) {
$("#skip").show();
}
show the skip button and continue to normal video. Is there any event that is continually fired as the video play progresses?
Do your check against the media.currentTime property in a handler for the timeupdate event. See documentation:
The timeupdate event is fired when the time indicated by the
currentTime attribute has been updated.
Just as an aside, this HTML5 video demo page is a really handy reference for playing around with the various properties and events available to you.
I have created a fiddle of my function here( http://jsfiddle.net/rhy5K/10/ ) . Now i want to provide the Sound "Mute/unpute" option for users. Example if i click on "a link then sound playing like Get ready,5,4,3,2,1 should be mute and vice-versa.
I am thinking like to call a to toggle_sound function on click, but i am confuse like what should i write inside the function to mute the sound.
Please provide me a logic, or a solution for my problem.
Explanation using code example:
I want to MUTE/UnMUTE this below sound playing
var playGetReady = function (done) {
var ids = ['audiosource', 'a_5', 'a_4', 'a_3', 'a_2', 'a_1'],
playNext = function () {
var id = ids.shift();
document.getElementById(id).play();
if (ids.length) {
setTimeout(playNext, 1000);
} else {
done();
}
};
playNext();
};
Warning: This JS fiddle demo may play sound on load
Try
HTML5 Video_tag for display video with audio
or
this below example along with html5 with jquery
window.my_mute = false;
$('#my_mute_button').bind('click', function(){
$('audio,video').each(function(){
if (!my_mute ) {
if( !$(this).paused ) {
$(this).data('muted',true); //Store elements muted by the button.
$(this).pause(); // or .muted=true to keep playing muted
}
} else {
if( $(this).data('muted') ) {
$(this).data('muted',false);
$(this).play(); // or .muted=false
}
}
});
my_mute = !my_mute;
});
I think you can use:
document.getElementById(id).volume = 1;
or
document.getElementById(id).volume = 0;