Develop Reference

Chrome extension simulate hover over Youtube player

I am developing a Chrome extension for Youtube and when the user clicks a button that I have created I want to simulate a mouse hover over the player, without moving the mouse. When a video is playing and the mouse is, manually, hovered over the player, the controls (play, pause etc) and the progress bar shows and this is what I am trying to accomplish, but with a button click instead of hovering.
I don't want to pause the video, only show the bottom controls and progress bar when the user clicks the button I have created.
manifest.json
//name, description, background etc
"content_scripts": [
{
"matches": ["http://www.youtube.com/*", "https://www.youtube.com/*"],
"js": ["jquery.js", "content.js"]
}
]
content.js
$('#myButton').on('click', function() {
//I have tried the following:
$('#movie_player').trigger('mouseenter')
$('#movie_player').mouseenter()
document.getElementById('movie_player').onmouseenter()
//I can play/pause the video with:
$('#movie_player').click()
}
I have also tried "mouseover" (jQuery) and "onmouseover" (javascript) and I have also tried these on several different child elements of the #movie_player without success.
When hovering manually over the player, Chrome's DevTools shows me that the #movie_player element has a class (ytp-autohide) which gets removed/added when the mouse is entering/leaving the element. However. I can't just remove this class when the user clicks my button because then the progress bar/duration time is not updated.
Any ideas?

Managed to solve it if someone is interested (with help from this extension)
$('#myButton').on('click', function() {
const ytplayer = document.querySelector('.html5-video-player')
const video = ytplayer.querySelector('video')
const progressbar = ytplayer.querySelector('.ytp-play-progress')
const loadbar = ytplayer.querySelector('.ytp-load-progress')
//show controls and progress bar
$('.html5-video-player').toggleClass('ytp-autohide')
//update red progress bar
video.addEventListener('timeupdate', updateProgressBar)
function updateProgressBar() {
progressbar.style.transform = 'scaleX('+(video.currentTime/video.duration)+')'
}
//update grey buffer progress
video.addEventListener('progress', updateBufferProgress)
function updateBufferProgress() {
loadbar.style.transform = 'scaleX('+(video.buffered.end(video.buffered.length-1)/video.duration)+')'
}
//update current time
$('.ytp-time-current').text(formatTime( video.currentTime ))
//update current time every second
const i = setInterval(function(){
$('.ytp-time-current').text(formatTime( video.currentTime ))
}, 1000)
//stop after 3 seconds
setTimeout(function() {
$('.html5-video-player').toggleClass('ytp-autohide')
clearInterval(i)
video.removeEventListener('timeupdate', updateProgressBar)
video.removeEventListener('progress', updateBufferProgress)
}, 3000)
}
function formatTime(time){
time = Math.round(time)
const minutes = Math.floor(time / 60)
let seconds = time - minutes * 60
seconds = seconds < 10 ? '0' + seconds : seconds
return minutes + ':' + seconds
}

seekTo() is not a function YouTube iframe API error

I am using a Wordpress plugin to add timestamp links of videos that will seek the video automatically to a certain timeframe.
Javascript:
function onYouTubeIframeAPIReady(){
console.log('Confirmation of call to onYouTubeIframeAPIReady()');
var STT = {
settings: STTSettings,
media: undefined,
skipTo: undefined,
isHTML5: false,
isYoutube: true,
doHTML5Skip: function() {
STT.media.removeEventListener('canplaythrough', STT.doHTML5Skip);
STT.media.currentTime = STT.skipTo;
STT.media.play();
},
doYoutubeSkip: function() {
STT.media.seekTo(STT.skipTo);
STT.media.playVideo();
}
};
STTSkipTo = function(time) {
var audio = document.getElementsByTagName('audio'),
video = document.getElementsByTagName('video'),
iframe = document.getElementsByTagName('iframe'),
timeArray = time.split(':').reverse(),
seconds = parseInt(timeArray[0]),
minutes = timeArray.length > 1 ? parseInt(timeArray[1]) : 0,
hours = timeArray.length > 2 ? parseInt(timeArray[2]) : 0;
STT.skipTo = seconds + (minutes * 60) + (hours * 3600);
if (STT.media) {
console.log(STT.media.seekTo);
STT.doSkip();
return;
}
if ((parseInt(STT.settings.link_audio) && audio.length) ||
(parseInt(STT.settings.link_video) && video.length))
{
STT.doSkip = STT.doHTML5Skip;
if (parseInt(STT.settings.link_audio) && audio.length) {
STT.media = audio[0];
} else {
STT.media = video[0];
}
STT.media.addEventListener('canplaythrough', STT.doHTML5Skip);
STT.media.load();
STT.media.play();
return;
} else if (parseInt(STT.settings.link_youtube && iframe.length)) {
// Inspect the iframes, looking for a src with youtube in the URI
for (var i = 0; i < iframe.length; i++) {
if (iframe[i].src.search('youtube') !== -1) {
// Set up the JS interface
STT.doSkip = STT.doYoutubeSkip;
iframe[0].id = 'stt-youtube-player';
STT.media = new YT.Player('stt-youtube-player', {
events: {
onReady: STT.doYoutubeSkip
}
});
return;
}
}
}
console.log('Skip to Timestamp: No media player found!');
return;
}
}
On my localhost, the plugin works seamlessly but on my hosted website, I get the following error with the stack as follows:
Uncaught TypeError: STT.media.seekTo is not a function
I think for some reason the website is unable to load the www-widgetapi.js which is a dependency for YouTube iframe API and thus is unable to generate the required function definition. However, I did try to include the script manually in the header but it still didn't work.
If anyone knows of any other wordpress plugin, please advice.

Based from this documentation, you need to set both the two parameter of the player.seekTo(seconds:Number, allowSeekAhead:Boolean).
Seeks to a specified time in the video. If the player is paused when the function is called, it will remain paused. If the function is called from another state (playing, video cued, etc.), the player will play the video.
The seconds parameter identifies the time to which the player should advance.
The player will advance to the closest keyframe before that time unless the player has already downloaded the portion of the video to which the user is seeking.
The allowSeekAhead parameter determines whether the player will make a new request to the server if the seconds parameter specifies a time outside of the currently buffered video data.
It should be like: Player.seekTo(120, true)//120 seconds

need javascript to automatically reload page when minute updates

I am using the following code in my website which displays the current time
function startTime() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
m = checkTime(m);
s = checkTime(s);
document.getElementById('time').innerHTML =
h + ":" + m;
var t = setTimeout(startTime, 500);
}
function checkTime(i) {
if (i < 10) {i = "0" + i}; // add zero in front of numbers < 10
return i;
}
i am also using the automatic refresher tag in my html which reloads page after every 60 seconds
<meta http-equiv="refresh" content="60">
what i want is whenever the time changes to next minute the page reloads
which means if current time is 14:05 and when it hits 14:06 the page reloads by reading this time change and NOT by 60 seconds interval from which the user opens the page.

You can set timeout looking at the clock, just get the actual seconds and wait til 60 to reload:
var date = new Date();
setTimeout(function(){
window.location.reload(1);
},(60 - date.getSeconds())*1000)
Just put that at the head inside a script tag

Try using this
setTimeout(function(){
window.location.reload(1);
}, 60000); // 60 sec
Source: How to reload page every 5 second?
or take a look at this too
setTimeout(function(){
var minutes = (new Date()).getMinutes()
if ( !minutes%15 ) location.reload(); // if minutes is a multiple of 15
},60000); // 60.000 milliseconds = 1 minute
Source: jQuery auto refresh page on clock time

Handling the local time using client side script is not recommended because the user's clock might be messed up and thus your system would turn out to be faulty.
So it is better you fetch time from your server using any server-side language like PHP
In PHP:
<?php
echo date("h:i");
?>
Now you can call this function using AJAX and you can easily handle your time.
var result=null;
function getDate(){
var result=$.ajax({
url: "script.php",
type: "POST",
success: function(data){
setTimeOut(function(){getDate();},60000);
}
}).responseText;
}

JQuery progress bar pauses when browser tab is changed

I'm trying to display a progress bar on a html page using javascript. However,
when the browser tab containing the code becomes inactive, the progress bar stops updating,
being resumed when the tab is active again.
How can I prevent the browser from stopping/pausing the execution of javascript code when the window is inactive?
Although it may be irrelevant, here is the code:
Object.progressBar = function(){
$( "#question-progress-bar" ).progressbar({
value: false,
complete: function(event, ui) { ... }
});
var seconds = 15.0,
progressbar = $("#question-progress-bar"),
progressbarValue = progressbar.find(".ui-progressbar-value");
progressbarValue.css({
"background": '#c5b100',
"opacity" : '0.8'
})
var int = setInterval(function() {
var percent = (15-seconds)/15*100;
seconds=seconds-0.1;
progressbar.progressbar( "option", {
value: Math.ceil(percent)
});
$("#question-progress-bar-seconds").html((seconds).toFixed(1)+"s");
if (seconds <= 0.1) {
clearInterval(int);
}
}, 100);
}

Instead of using setInterval and assuming a certain amount of time has passed between calls (even when it's up front, setInterval has hit or miss accuracy) use the Date object to get a time when the bar starts, and compare that to the current time at each iteration.
<html>
<head>
<script>
function go()
{
var pb = new ProgressBar(5, "targ");
}
window.onload = go;
function ProgressBar(l, t)
{
var start = Date.now();
var length = l * 1000;
var targ = document.getElementById(t);
var it = window.setInterval(interval, 10);
function interval()
{
var p = 100 * (Date.now() - start) / length;
if(p > 100)
{
p = 100;
window.clearInterval(it);
alert("DONE"); // alternatively send an AJAX request here to alert the server
}
targ.value = (Math.round(p) + "%");
}
}
</script>
</head>
<body>
<input type="text" id="targ" />
</body>
</html>
I've made an example object, here, that immediately starts a countdown when instantiated and calls an alert and kills the interval timer when done. Alternatively an AJAX call, or any other sort of call can be done upon completion.
It should be noted that this will NOT complete the call if the browser stops Javascript all together. It will, however, complete it as soon as the tab has been given focus again if enough time has passed in the interim. There is no way for a website to alter this sort of browser behavior from the scripting side.
Hope that helps!

Combine ASP.net AJAX timer with javascript countdown

I am currently working on porting a vb.net winforms program over to a web based version, and one of the functions in the original program has be stumped.
In the original program, every 5 minutes, a form pops up for user input. There is also a label control on the main form which counts down to the next popup. This is accomplished with a single timer control with a 1 second duration. every tick, it decrements the countdown, and when the countdown reaches 0, it pops up the form and then resets. Simple enough, but in my web app, I can't afford to be doing a postback every second, so what I am attempting is to combine a javascript countdown widget with an AJAX timer. Essentially, what should happen is that when the page loads, the countdown begins decrementing from 300 seconds, and the AJAX timer begins with a duration of 300 seconds. My idea is that when the timer ticks, it will run my function, as well as reset the countdown to 300 seconds again.
My problem, is that I am not able to reset the countdown with the code that I have, and I know that I am doing something (likely very simple) wrong, but I don't know enough Java to know what.
If I hardcode the Timer var to 300, the countdown works, and the timer ticks (fires the additional functons), but the countdown just keeps counting down (into negative numbers). How do I reset the countdown variable from code behind?
Here is the countdown function
var Timer = <%= CountDown %>;
function updateClock() {
// Update Countdown
Timer -= 1;
var TimerMin = Math.floor(Timer / 60);
var TimerSec = Timer - (TimerMin * 60);
TimerSec = (TimerSec < 10 ? "0" : "") + TimerSec;
var TimerFormat = TimerMin + ":" + TimerSec;
// Update the countdown display
document.getElementById("javaCountdown").firstChild.nodeValue = TimerFormat
}
Here is the body code
<body onload="updateClock(); setInterval('updateClock()', 1000 )">
And the Code Behind
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Countdown = 300
End Sub
PProtected Sub Timer1_Tick(ByVal sender As Object, ByVal e As EventArgs) Handles Timer1.Tick
Countdown = 300
'Additional Functions
End Sub

This solution uses jQuery.
<script>
var intervalSecond = null;
var interval5minutes = null;
$(document).ready(function() {
// enable both intervals
enableIntervals();
// onsubmit event for your form
$("#popupForm").submit(function() {
// hide the form again
$("#popupForm").css("display", "none");
// enable intervals again.
enableIntervals();
});
});
function enableIntervals() {
// every second interval
intervalSecond = setInterval(function() {
$("#updateMeEverySecond").html(new Date());
}, 1000);
// every 5 minutes interval
interval5minutes = setInterval(function() {
// display form and shut off the interval timers
$("#popupForm").css("display", "block");
clearInterval(intervalSecond);
clearInterval(interval5minutes);
}, 5 * 60 * 1000);
}
</script>
<div id="popupForm" style="display:none;">
<form>
<input type="text" />
</form>
</div>
<label id="updateMeEverySecond">Test</label>