I have a page in which clicking a link opens a lightbox and embeds a YouTube video in an <iframe>. The lightbox and <iframe> markup are generate on the fly by Lity.
Following the example right out of the documentation, where the <iframe> is hard-coded into the page, it works as expected.
<iframe id="existing-iframe-example"
width="640" height="360"
src="https://www.youtube.com/embed/M7lc1UVf-VE?enablejsapi=1"
frameborder="0"
style="border: solid 4px #37474F">
</iframe>
<script type="text/javascript">
var tag = document.createElement('script');
tag.id = 'iframe-demo';
tag.src = 'https://www.youtube.com/iframe_api';
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
var player;
function onYouTubeIframeAPIReady() {
console.log('api ready');
player = new YT.Player('existing-iframe-example', {
events: {
'onReady': onPlayerReady,
'onStateChange': onPlayerStateChange
}
});
}
function onPlayerReady(event) {
document.getElementById('existing-iframe-example').style.borderColor = '#FF6D00';
}
function changeBorderColor(playerStatus) {
var color;
if (playerStatus == -1) {
color = "#37474F"; // unstarted = gray
} else if (playerStatus == 0) {
color = "#FFFF00"; // ended = yellow
} else if (playerStatus == 1) {
color = "#33691E"; // playing = green
} else if (playerStatus == 2) {
color = "#DD2C00"; // paused = red
} else if (playerStatus == 3) {
color = "#AA00FF"; // buffering = purple
} else if (playerStatus == 5) {
color = "#FF6DOO"; // video cued = orange
}
if (color) {
document.getElementById('existing-iframe-example').style.borderColor = color;
}
}
function onPlayerStateChange(event) {
changeBorderColor(event.data);
}
</script>
I'm trying to modify it to work with a dynamically generated <iframe> (which is how Lity handles YouTube videos). I can see that the YouTube API script is being added to the page, but the function onYouTubeIframeAPIReady does not ever seem to be called, which according to documentation is supposed to fire as soon as API script loads.
HTML (to open lightbox)
<a href="https://www.youtube.com/embed/M7lc1UVf-VE?enablejsapi=1" class="lity" data-lity>open</a>
JavaScript (fires after lightbox object is available in DOM)
$(document).on("lity:ready", function (event, instance) {
console.log("Lightbox ready");
$(".lity-youtube iframe").attr("id", "x");
if ($("iframe#x").length) {
console.log("ID added to <iframe>");
} else {
console.log("ID NOT added to <iframe>");
}
var tag = document.createElement("script");
tag.id = "iframe-demo";
tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName("script")[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
if ($("#iframe-demo").length) {
console.log("api script added");
} else {
console.log("api script NOT added");
}
var player;
function onYouTubeIframeAPIReady() {
console.log("api ready");
player = new YT.Player("x", {
events: {
onReady: onPlayerReady,
onStateChange: onPlayerStateChange
}
});
}
function onPlayerReady(event) {
console.log("player ready");
document.getElementById("x").style.borderColor = "#FF6D00";
}
function changeBorderColor(playerStatus) {
var color;
if (playerStatus == -1) {
color = "#37474F"; // unstarted = gray
} else if (playerStatus == 0) {
color = "#FFFF00"; // ended = yellow
} else if (playerStatus == 1) {
color = "#33691E"; // playing = green
} else if (playerStatus == 2) {
color = "#DD2C00"; // paused = red
} else if (playerStatus == 3) {
color = "#AA00FF"; // buffering = purple
} else if (playerStatus == 5) {
color = "#FF6DOO"; // video cued = orange
}
if (color) {
document.getElementById("x").style.borderColor = color;
}
}
function onPlayerStateChange(event) {
console.log('state change');
changeBorderColor(event.data);
}
});
I tried pulling everything out of the lity:ready event handler with the same results....
Can anyone see what's going wrong?
EDIT/UPDATE
I tried running onYouTubeIframeAPIReady as a deferred object
var YTdeferred = $.Deferred();
window.onYouTubeIframeAPIReady = function() {
YTdeferred.resolve(window.YT);
};
and using it in the callback
var player;
YTdeferred.done(function (YT) {
console.log("api ready");
player = new YT.Player("x", {
events: {
//onReady: onPlayerReady,
//onStateChange: onPlayerStateChange
onReady: function () {
console.log("player ready from ananonymous");
},
onStateChange: onPlayerStateChange
}
});
console.log(player);
});
Now the YT.Player object is created (presumably on the iframe created by lity), but neither of the events (onReady and onStateChange) seem to be triggering. Also, it doesn't have access to any of the methods or properties that it should:
player.playVideo()
produces an error: player.playVideo is not a function`
Still stumped.
ANOTHER EDIT/UPDATE
Now I'm very confused because i created a version that replicates what lity does (I think) and the events (onReady and onStateChange) do in fact fire as expected.
Solution to a STUPID mistake
I can' believe I beat my head into the wall over this for so long... G'AAAAAAH!!
It's definitely a lity thing
When lity receives an argument (YouTube URL) formatted like
or
it converts it to
If you try to pass query string arguments to to a similarly formatted URL (such as: https://www.youtube.com/embed/XXXXXXXXX?enablejsapi=1 (which is required for the API calls to work), it URLencodes the ?enablejsapi=1 and adds it to the end of the converted URL, so you get:
https://www.youtube.com/embed/XXXXXXXX?autoplay=1&%3Fenablejsapi=1
As a result the enablejsapi=1 is never read in and therefore the YT.Player is never attached to the <iframe> DOM element.
** SOLUTION **
Pass the URL to lity in a format that passes the video ID as a query string argument (and append enablejsapi=1):
lity will now keep your argument(s) intact and convert to
https://www.youtube.com/embed/XXXXXXXX?autoplay=1&enablejsapi=1
Now the YT.Player call can read enablejsapi=1 and properly attach to the <iframe> element, and all is good in the universe.
<a href="https://www.youtube.com/watch?v=TJU-tBquzcM&enablejsapi=1" class="lity" data-lity>open lightbox with video</a>
.
