javascript - 滚动播放 Html5 视频

Question

我正在一个 WordPress 网站上工作，下面的代码可以按照我想要的方式工作(仅播放一次，“重播”按钮出现在末尾)

我希望它在滚动到 ie 时开始播放。在视口(viewport)中。

我在这里看到了几种不同的方法来实现这一点，但我无法让它们与我当前的代码很好地配合。

HTML

<div class="spacer">

  </div>
  <div class="video-wrapper">
    <video id="bVideo" muted autoplay>
      <source src="https://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4" />
    </video>
    <div id="playButton" class="playButton" onclick="playPause()"></div>
    <div class="replayButton" id="replayButton" onclick="playPause()">REPLAY ↻</div>
  </div>
<script>


var bunnyVideo = document.getElementById("bVideo");
var el = document.getElementById("playButton");
var replay = document.getElementById("replayButton");
replay.style.visibility = "hidden";

function playPause() {
  if (bunnyVideo.paused) 
  {
    bunnyVideo.play();
      replay.className = "replayButton";
  replay.style.visibility = "hidden";
  } 
  else 
  {
    bunnyVideo.pause();
    el.className = "playButton";
    replay.className = "";
  }
}

function playPauseControls() {
  if (!bunnyVideo.paused) {
    el.className ="";
    replay.className = "";
  } else {
     el.className = "playButton";
     replay.className = "";
  }
}

function videoEnd() {
  replay.className = "replayButton";
  replay.style.visibility = "visible";
  el.className = "";
  }




function showControls(){
  bunnyVideo.setAttribute("controls","controls");
}
function hideControls(){
  bunnyVideo.removeAttribute("controls","controls");
}

/*Google Analytics Tracker Function*/
/*Assuming you've already set up the Google Analytics script function on your webpage. This just activates a trigger event when the video plays.*/
/*function bunnyVideoView() {
     ga('send', 'event', { 
          'eventCategory': 'Bunny Video',
          'eventAction': 'play',
          'eventLabel': 'Bunny Video View'
     });
}*/


bunnyVideo.addEventListener("play", playPauseControls, false);
bunnyVideo.addEventListener("pause", playPauseControls, false);
bunnyVideo.addEventListener("mouseout", hideControls, false);
bunnyVideo.addEventListener("ended", videoEnd, false);
/*Google Analytics Tracker*/
/*bunnyVideo.addEventListener("play", bunnyVideoView, false);*/

</script>

CSS

.spacer {
  height: 400px;
}

.video-wrapper {
  position: relative;
  max-width: 680px;
}

.video-wrapper > video {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    vertical-align: middle;
    cursor: pointer;
}

/* Hide iOS Play Button */
video::-webkit-media-controls-start-playback-button {
    display: none!important;
    -webkit-appearance: none;
}


.playButton {
  border-radius: 100px;
  border: 8px solid #fff !important;
  height: 100px;
  position: absolute;
  width: 100px;
  margin: auto;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  cursor: pointer;
  display: block;
  opacity: 0.95;
  transition: opacity 400ms;
}

.playButton:before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 25px 0 25px 50px;
  border-color: transparent transparent transparent #fff;
  position: absolute;
  top: 0;
  left: 0;
  right: -10px;
  bottom: 0;
  margin: auto;
}

.replayButton {
    color: black;
  position: relative;
    text-align: center;
  margin: auto;
    margin-top: 0px;
  cursor: pointer;
  display: block;
  opacity: 0.95;
  transition: opacity 150ms;
}

.replayButton:hover, .replayButton:focus {
  color: #ea7200;
}

.replayButton:before {
  height: 45px;
  width: 45px;
  position: absolute;
  top: 18px;
  left: 18px;
  content: '';
  display: block;
  border-color: transparent white white white;
  border-radius: 50%;
  border-style: solid;
  border-width: 8px;
  -webkit-transform: rotate(-90deg);
  transform: rotate(-90deg);
}
.replayButton:after {
  border-color: transparent transparent transparent white;
  border-style: solid;
  border-width: 0 45px 22px 22px;
  height: 0;
  position: absolute;
  top: 40px;
  left: 15px;
  bottom: 0;
  right: 0;
  width: 0;
  content: "";
  display: block;
  margin: auto;
}

https://jsfiddle.net/ag3sowbg/

Answer 1

我前段时间必须解决类似的任务。

首先，添加一个绝对位于视频包装器死点的空元素。

接下来，将视口(viewport)的“带”定义为视频触发器的跟踪区域。

在 window.scroll 上，您只需检测碰撞触发器是否进入或离开触发区域，然后播放或暂停视频。

我希望这有帮助: CodePen link

PS:我可能会非常小心地添加自定义播放/重播按钮，因为不同浏览器中的许多媒体播放器都使用自己的(Safari、Firefox)，并且您很可能最终会遇到两者相互竞争(请注意，浏览器默认设置总是获胜)。去过那里 :) 如果它们不是必需的，请将它们删除...