我正在使用JavaScript/jQuery视频播放器。它有一个我找不到原因的错误。
除其他外,播放器还具有一个进入/退出全屏按钮(可以在HTML代码段的底部看到):
(function($) {
/* Helper functions */
/* 1) full screen */
function toggleFullScreen(elem) {
if ((document.fullScreenElement !== undefined && document.fullScreenElement === null) || (document.msFullscreenElement !== undefined && document.msFullscreenElement === null) || (document.mozFullScreen !== undefined && !document.mozFullScreen) || (document.webkitIsFullScreen !== undefined && !document.webkitIsFullScreen)) {
if (elem.requestFullScreen) {
elem.requestFullScreen();
} else if (elem.mozRequestFullScreen) {
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullScreen) {
elem.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
} else if (elem.msRequestFullscreen) {
elem.msRequestFullscreen();
}
} else {
if (document.cancelFullScreen) {
document.cancelFullScreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitCancelFullScreen) {
document.webkitCancelFullScreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
}
}
$('video').each(function() {
var video = $(this)[0],
videoContainer = video.closest('div'),
$playToggleBtn = $(videoContainer).find('input[name="play-pause"]'),
$progressBar = $(videoContainer).find('.progress-bar'),
$progress = $(videoContainer).find('.progress'),
$current_time = $(videoContainer).find('.current-time'),
$durationDisplay = $(videoContainer).find('.duration'),
$volumeSlider = $(videoContainer).find('.volume-slider'),
$mute_toggle = $(videoContainer).find('.mute-toggle'),
$muteBtn = $mute_toggle.find('input[type="checkbox"]'),
$rate_display = $(videoContainer).find('.rate_display'),
$fullScreenToggler = $(videoContainer).find('input[name="screen-toggler"]'),
$playSpeed = $(videoContainer).find('.playback-rate ul li');
$(document).bind('webkitfullscreenchange mozfullscreenchange fullscreenchange', function(e) {
var state = document.fullScreen || document.mozFullScreen || document.webkitIsFullScreen;
var event = state ? 'FullscreenOn' : 'FullscreenOff';
if (event === 'FullscreenOff') {
$(videoContainer).removeClass('fullscreen');
$fullScreenToggler.removeClass('exit');
} else {
$(videoContainer).addClass('fullscreen');
$fullScreenToggler.addClass('exit');
}
});
});
})(jQuery);
<div class="video-container">
<video poster="posters/poster.jpg">
<source src="videos/mymovie.mp4" type="video/mp4" />
</video>
<div class="controls-wrapper">
<div class="progress-bar">
<div class="progress"></div>
</div>
<ul class="video-controls">
<li><input type="button" name="play-pause" value="Play" class="play" /></li>
<li><a href="#" class="previous">Previous</a></li>
<li><a href="#" class="next">Next</a></li>
<li class="mute-toggle unmuted"><input type="checkbox" name="mute" /></li>
<li><input type="range" min="0" max="1" step="0.01" class="volume-slider" /></li>
<li><span class="current-time"></span><span>/</span><span class="duration"></span></li>
<li class="playback-rate">
<span class="rate_display">Normal</span>
<div class="piker">
<ul class="dropdown-content" id="rate_selector">
<li data-rate="0.5">0.5x</li>
<li data-rate="0.75">0.75x</li>
<li data-rate="1">Normal</li>
<li data-rate="1.125">1.125x</li>
<li data-rate="1.5">1.5x</li>
<li data-rate="2">2x</li>
</ul>
</div>
</li>
<li class="fullscreen-container">
<input type="button" name="screen-toggler" value="Fullscreen" class="toggle-fullscreen" />
</li>
</ul>
</div>
</div>
问题:如果我有两个视频(或更多),即使单击第一个剪辑的全屏按钮,
fullscreen
类名也将添加到页面上的所有video-container
元素中。为什么会这样呢?
更新:
按照Kaiido的回答,我已使用以下代码解决了此问题。
$(document).on('fullscreenchange', evt => {
if ($(document.fullscreenElement).is(videoContainer)) {
$(document.fullscreenElement).addClass('fullscreen');
$(videoContainer).removeClass('fullscreen');
$fullScreenToggler.removeClass('exit');
} else {
$(videoContainer).removeClass('fullscreen');
$fullScreenToggler.addClass('exit');
}
});
解决了上述问题。但是,我失去了使用ESC键作为全屏退出的功能。
更新2:
我已将播放器插入 Github repo 。
最佳答案
您将事件绑定(bind)到Document对象的次数与页面中具有元素的次数相同。
Stacksnippets不允许全屏显示,但是您正在做的一个模型是:
$('div').each(function(i, el) {
$(document).on('click', e => console.log('clicked'));
console.log('added click event on Document');
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
<div>test</div>
因此,每次您进入或退出全屏模式时,所有这些事件都会触发,并会在每个视频上进行调整,无论该事件是来自哪个视频。
您最好在
each
迭代器之外添加单个事件处理程序$(document).on('fullscreenchange', evt => {
if($(document.fullscreenElement).is('video')) {
$(document.fullscreenElement).addClass('fullscreen');
}
else {
$('video.fullscreen').removeClass('fullscreen');
}
});
但是,实际上,使用全屏类的所有操作都是无用的,因为已经有一个
:fullscreen
pseudo class由浏览器本地设置。关于javascript - jQuery视频播放器的全屏切换未正确分配类名称,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/56680150/