September 2022
Intermediate to advanced
585 pages
8h 17m
Chinese
Content preview from JavaScript 经典实例：第三版
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
408
｜
第
15
章
</audio>
在当前支持
audio
和
video
元素的浏览器中，显示的外观并不相同。外观没有统
一标准，每个浏览器都有自己的理解。你可以自己提供播放控件，并通过元素、
CSS
、
SVG
或画布装饰外观。
15.6
使用
JavaScript
控制
video
元素
15.6.1
问题
你想把视频嵌入网页，确保视频控件的外观在不同的浏览器和操作系统中保持一致。
15.6.2
方案
使用
HTML5 video
元素。
<video
id="meadow" poster="purples.jpg"
>
<source
src="meadow.m4v" type="video/mp4"
/>
<source
src="meadow.ogv" type="video/ogg"
/>
</video>
你可以通过
JavaScript
提供控件，如例程
15-5
所示。按钮用于提供视频控件，
div
元素中的文本用于显示播放时间。
例程
15-5
：为
HTML5 video
元素提供自定义控件
<!DOCTYPE html>
<html
lang="en"
>
<head>
<meta
charset="UTF-8"
/>
<meta
name="viewport" content="width=device-width, initial-scale=1.0"
/>
<meta
http-equiv="X-UA-Compatible" content="ie=edge"
/>
<title>
Controlling Video ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.