按来源查找所有YouTube iFrame

时间:2016-05-18 16:57:54

标签: jquery regex iframe

我正在尝试修改Fluid Width YouTube Videos script by CSS-Tricks以使其更新。我对正则表达式有一些问题。

这个正则表达式有效:

  • $("iframe[src^='https://www.youtube-nocookie.com']")

这个正则表达式不起作用:

  • $("iframe[src^='\s*(https?://www.youtube(?:-nocookie)?.com/(?:v|embed)/([a-zA-Z0-9-]+).*)']")

后来的验证,所以我认为这是我将它放入JS的问题。

根据正则表达式查找iframe源的正确方法是什么?

HTML:

<div class="stripe">
  <div class="container">
    <div class="video-container small">
      <iframe class="video youtube" src="https://www.youtube-nocookie.com/embed/4mBqT7RcEyM?rel=0&amp;showinfo=0" frameborder="0" allowfullscreen width="530" height="298"></iframe>
    </div>
  </div>
</div>

CSS:

.stripe {
        display:table;
        margin:0px;
        padding:0px;
        width:100%;
    }
.container {
    max-width:100%;
        margin:15px auto;
        padding:15px 50px;
        background-color:#fff;
    }
.video-container {
        max-width:530px;
}

JS:

$(function() {

    // Find all YouTube videos
var $allVideos = $("iframe[src^='\s*(https?://www.youtube(?:-nocookie)?.com/(?:v|embed)/([a-zA-Z0-9-]+).*)']"),

        // The element that is fluid width
        $fluidEl = $(".video-container");

    // Figure out and save aspect ratio for each video
    $allVideos.each(function() {

        $(this)
            .data('aspectRatio', this.height / this.width)

            // and remove the hard coded width/height
            .removeAttr('height')
            .removeAttr('width');

    });

    // When the window is resized
    // (You'll probably want to debounce this)
    $(window).resize(function() {

        var newWidth = $fluidEl.width();

        // Resize all videos according to their own aspect ratio
        $allVideos.each(function() {

            var $el = $(this);
            $el
                .width(newWidth)
                .height(newWidth * $el.data('aspectRatio'));

        });

    // Kick off one resize to fix all videos on page load
    }).resize();

});

JSFiddle.

1 个答案:

答案 0 :(得分:1)

^=是&#34;以&#34;开头jQuery选择器,而不是正则表达式选择器。

实现此目标的最简单方法是按iframe选择所有.filter元素和src元素。

var $allVideos = $('iframe').filter(function() {
  return this.src.match(/\s*(https?:\/\/www.youtube(?:-nocookie).com\/(?:v|embed)\/([a-zA-Z0-9-]+).*)/);
});