Question

js在我的网站上播放视频

但我想停止播放视频，如果不是在视点

我制作此代码

$(document).on("scroll", function() {
  var scrollTop = $(window).scrollTop();
  $( "video" ).each(function() {
    var pos = index.position();
    if (scrollTop < pos.top + 100) {
                $(this)[0].play();
    }
    if (scrollTop > pos.top + 400) {
                $(this)[0].stop();
    }
    if (scrollTop < pos.top - 400) {
                $(this)[0].stop();
    }
  });
});

但它对我不起作用而且没有显示任何错误

这是演示页＆＃34; http://jsbin.com/yaqozihita/1/＆＃34;

Answer 1

您可以使用此代码来检测元素是否在视图中。迭代每个视频元素，如果isInView（）为真，则启动视频，如果没有暂停则暂停，如果没有暂停。

警告：您需要确保视频至少加载了元数据，否则视频元素可能会导致错误。使用preload="auto"和canplay事件提前检测此阶段（此处未显示）。

＆＃13;

function isInView(el) {
  var rect = el.getBoundingClientRect();           // absolute position of video element
  return !(rect.top > $(window).height() || rect.bottom < 0);   // visible?
}

$(document).on("scroll", function() {
  $( "video" ).each(function() {
    if (isInView($(this)[0])) {                    // visible?
      if ($(this)[0].paused) $(this)[0].play();    // play if not playing
    }
    else {
      if (!$(this)[0].paused) $(this)[0].pause();  // pause if not paused
    }
  });  
});

＆＃13;

div {width:400px;}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div>
<h1>Scroll down to start video</h1>
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  <video loop style="width:320px;height:auto;">
    <source src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" type="video/mp4">
        <source src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.webm" type="video/webm">
            <source src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.ogv" type="video/ogg">
  </video>

<br><br>
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Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummtext ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... <br><br>

    <video loop style="width:320px;height:auto;">
    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.mp4" type="video/mp4">
        <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.webm" type="video/webm">
  </video>
Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummtext ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... <br><br>
Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummtext ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... Dummy text ... <br><br>

</div>

＆＃13;

Answer 2

暂停使用

：

$（本）[0] .pause（）;

播放使用：

$（本）[0] .play（）;

在firefox和chrome上测试

如果不是点视图，我怎么能停止播放视频

2 个答案: