滚动播放器最小化和浮动播放器不适用于 JW 播放器

Question

我刚刚在 WordPress 页面上设置了 JW Player 实例。我想重新创建在https://developer.jwplayer.com/jw-player/demos/advanced/minimize-and-float-video-on-scroll/ 找到的功能，玩家可以移动到页面的左侧或右侧并与用户一起滚动。我输入了 JW Player 提供的代码如下：

    <div id="float-video-player" class="player-container"></div>

     <!-------------------------- JW Player Float and scroll ----------------------------->

<script type="text/javascript">

// initialize jwplayer
var playerInstance = jwplayer('float-video-player');

// player dom elements
var playerContainerEl = document.querySelector('.player-container');

// returns video player position from top of document
  function getElementOffsetTop(el) {
    var boundingClientRect = el.getBoundingClientRect();
    var bodyEl = document.body;
    var docEl = document.documentElement;
    var scrollTop = window.pageYOffset || docEl.scrollTop || bodyEl.scrollTop;
    var clientTop = docEl.clientTop || bodyEl.clientTop || 0;
    return Math.round(boundingClientRect.top + scrollTop - clientTop);
}

// returns the current y scroll position
function getScrollTop() {
    var docEl = document.documentElement;
    return (window.pageYOffset || docEl.scrollTop) - (docEl.clientTop || 0);
}

// configure jwplayer instance
playerInstance.setup({
    autostart: true,
    file: 'https://cdn.jwplayer.com/players/jgjfjfj',
    primary: 'html5',
    setFullscreen: true,
    width: '100%'
});

// when jwplayer instance is ready
playerInstance.on('ready', function() {
    var config = playerInstance.getConfig();
    var utils = playerInstance.utils;
    // get height of player element
    var playerHeight = config.containerHeight;

    // get player element position from top of document
    var playerOffsetTop = getElementOffsetTop(playerContainerEl);

    // set player container to match height of actual video element
    // this prevents container from disappearing and changing element positions
    // on page when player becomes minimized. this also leaves a nice visual
    // placeholder space for minimized player to return to when appropriate
    playerContainerEl.style.height = playerHeight + 'px';

    // below we handle window scroll event without killing performance
    // this is a minimal approach. please consider implementing something more extensive:
    // i.e. http://joji.me/en-us/blog/how-to-develop-high-performance-onscroll-event

    // determine player display when scroll event is called
    // if inline player is no longer visible in viewport, add class
    // .player-minimize to minimize and float. otherwise, remove the class to put
    // player back to inline inline position
    function onScrollViewHandler() {
        var minimize = getScrollTop() >= playerOffsetTop;

        utils.toggleClass(playerContainerEl, 'player-minimize', minimize);
        // update the player's size so the controls are adjusted
        playerInstance.resize();
    }

    // namespace for whether or not we are waiting for setTimeout() to finish
    var isScrollTimeout = false;

    // window onscroll event handler
    window.onscroll = function() {
        // skip if we're waiting on a scroll update timeout to finish
        if (isScrollTimeout) return;
        // flag that a new timeout will begin
        isScrollTimeout = true;
        // otherwise, call scroll event view handler
        onScrollViewHandler();
        // set new timeout
        setTimeout(function() {
            // reset timeout flag to false (no longer waiting)
            isScrollTimeout = false;
        }, 80);

    };

});
</script>

所以当我将代码推送到网站时，播放器在那里，但预期的功能不起作用，是不是缺少了什么？

Answer 1

JW Player 演示中的代码要求您使用额外的 CSS，这些 CSS 包含在 JozeAE 的答案中。

例如： utils.toggleClass(playerContainerEl, 'player-minimize', minimize);

这要求您有一个类player-minimize，它定义了最小化状态。

根据上面的答案（取自 JW Player 演示页面），这将是 player-minimize 和 player-container（这是一个包装播放器的 DIV）：

        .player-container {
            background-color: black;
            float: left;
            margin: 20px 20px 10px 0;
            width: 500px;
        }

        .player-minimize .player-position {
            background-color: white;
            border-radius: 2px;
            bottom: 20px;
            box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.25);
            left: 20px;
            padding: 7px;
            position: fixed;
            width: 300px;
            z-index: 1;
        }

不过，样式可以根据您的需要进行调整。

Answer 2

        <!DOCTYPE html>
        <html lang="en">
        <head>
          <style type="text/css">
        .demo-layout-content {
           margin-right: 250px;
           margin-left: 250px;
    }
        .player-container {
            background-color: black;
            float: left;
            margin: 20px 20px 10px 0;
            width: 500px;
        }

        .player-minimize .player-position {
            background-color: white;
            border-radius: 2px;
            bottom: 20px;
            box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.25);
            left: 20px;
            padding: 7px;
            position: fixed;
            width: 300px;
            z-index: 1;
        }

        .demo-single .demo-layout-content .jwplayer {
            margin: 0;
        }

        .demo-layout-content {
            text-align: left;
        }

        .demo-single .demo-layout-content h2 {
            font-size: 42px;
            font-weight: 700;
            margin-top: 20px;
        }

        .demo-single .demo-layout-content p,
        .demo-single .demo-layout-content p + p {
            margin-top: 20px;
        }

        .demo-single .demo-layout-vertical .demo-layout-code {
            max-width: 900px;
            width: 100%;
        } </style>

        </head>

            <div class="demo-container">

              <div class="demo-layout-vertical">
                <div class="demo-layout-content">
                  <script src="//content.jwplatform.com/libraries/IDzF9Zmk.js"></script>

        <div class="player-container">
            <div class="player-position">
                <div id="player"></div>
            </div>
        </div>

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        <script type="text/javascript">// initialize jwplayer
        var playerInstance = jwplayer('player');
        // player dom elements
        var playerContainerEl = document.querySelector('.player-container');
        // returns video player position from top of document
        function getElementOffsetTop(el) {
          var boundingClientRect = el.getBoundingClientRect();
          var bodyEl = document.body;
          var docEl = document.documentElement;
          var scrollTop = window.pageYOffset || docEl.scrollTop || bodyEl.scrollTop;
          var clientTop = docEl.clientTop || bodyEl.clientTop || 0;
          return Math.round(boundingClientRect.top + scrollTop - clientTop);
        }
        // returns the current y scroll position
        function getScrollTop() {
          var docEl = document.documentElement;
          return (window.pageYOffset || docEl.scrollTop) - (docEl.clientTop || 0);
        }
        // configure jwplayer instance
        playerInstance.setup({
          "autostart": "true",
          "file": "//content.jwplatform.com/manifests/vM7nH0Kl.m3u8",
          "width": "100%"});

        // when jwplayer instance is ready
        playerInstance.on('ready', function() {
                var config = playerInstance.getConfig();
                var utils = playerInstance.utils;
                // get height of player element
                var playerHeight = config.containerHeight;
                // get player element position from top of document
                var playerOffsetTop = getElementOffsetTop(playerContainerEl);
                // set player container to match height of actual video element
                // this prevents container from disappearing and changing element positions
                // on page when player becomes minimized. this also leaves a nice visual
                // placeholder space for minimized player to return to when appropriate
                playerContainerEl.style.height = playerHeight + 'px';
                // below we handle window scroll event without killing performance
                // this is a minimal approach. please consider implementing something more extensive:
                // i.e. http://joji.me/en-us/blog/how-to-develop-high-performance-onscroll-event
                // determine player display when scroll event is called
                // if inline player is no longer visible in viewport, add class
                // .player-minimize to minimize and float. otherwise, remove the class to put
                // player back to inline inline position
                function onScrollViewHandler() {
                    var minimize = getScrollTop() >= playerOffsetTop;
                    utils.toggleClass(playerContainerEl, 'player-minimize', minimize);
                    // update the player's size so the controls are adjusted
                    playerInstance.resize();
                }
                // namespace for whether or not we are waiting for setTimeout() to finish
                var isScrollTimeout = false;
                // window onscroll event handler
                window.onscroll = function() {
                    // skip if we're waiting on a scroll update timeout to finish
                    if (isScrollTimeout) return;
                    // flag that a new timeout will begin
                    isScrollTimeout = true;
                    // otherwise, call scroll event view handler
                    onScrollViewHandler();
                    // set new timeout
                    setTimeout(function() {
                        // reset timeout flag to false (no longer waiting)
                        isScrollTimeout = false;
                    }, 80);
                };
            });</script>

        <script type="text/javascript">
          function setVersion() {
            if (typeof jwplayer === 'undefined') {
              setTimeout(setVersion, 100);
              return;
            }
            if (jwplayer && jwplayer().id) {
              jwplayer().on('ready', function() {
                document.getElementById('demo-player-version').innerHTML = jwplayer.version.split('+')[0];
              });
            }
          }
          setVersion();</script>
        </html>