为什么内联视频 src 媒体查询不起作用？

Question

我最近创建的网页有两个视频，但内联媒体查询不起作用。

播放器正在拉取源列表中的第一个视频。

这是我的代码：

        <video class="intro-video" controls poster="lineandgrid-video-intro-cover.gif">
            <source media="(max-width: 750px)" src="lineandgrid-introduction-video-mobile.mp4" type="video/mp4">
            <source media="(min-width: 751px)" src="lineandgrid-introduction-video.mp4" type="video/mp4">
        </video>

有人可以告诉我我做错了什么吗？您可以在此处查看实时网页：https://lineandgrid.ca/video/

Answer 1

媒体查询通常只支持元素。

Attributes: Media: Media query of the resource's intended media; this should be used only in a <picture> element.

来源：https://developer.mozilla.org/en-US/docs/Web/HTML/Element/source：

Chrome does not support inline media queries on the source tag within videotag. [...] Worse, plain media queries will not stop multiple videos from loading, which effectively doubles your data, so it requires a JS solution.

来源：https://blog.greggant.com/posts/2019/08/02/responsive-videos-javascript-solution-video-source-tag.html

建议的JS解决方案，如果原博客post变得不可用：https://gist.githubusercontent.com/fuzzywalrus/8abdd088e3fb6a73fd5d980f7bab0118/raw/9922cce9c4c040164f383671070e588c2adff944/responsivevideo.js

原回答：

Apparently, support for inline media queries has been removed:

Chrome not respecting video source inline media queries

为什么内联视频 src 媒体查询不起作用？

How come inline video src media queries aren't working?

html

css

video