September 2022
Intermediate to advanced
585 pages
8h 17m
Chinese
Content preview from JavaScript 经典实例：第三版
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394
第
15
章
处理媒体文件
精美的图片，华丽的动画，炫酷的视频。一番多姿多彩的景象！
众多媒体类型为网络世界增资添彩。我们可以利用
SVG
和画布等老朋友实现复杂的
动画、图表和图形。除此之外，还有
HTML5
增加的视频和音频元素，以及不远的
将来可能支持的
3D
图形。
让人意想不到的是，这些都不需要使用任何专属插件，完全内置于所有浏览器客户
端，涵盖智能手机、平板电脑和计算机。
15.1
为
SVG
添加
JavaScript
代码
15.1.1
问题
你想为
SVG
文件或元素添加
JavaScript
代码。
15.1.2
方案
在
SVG
中引入
JavaScript
的方法与
HTML
一样，也是用
script
标签，只不过要把脚
本放在
CDATA
标记中（参见例程
15-1
）。
DOM
方法也可用于处理
SVG
元素。
处理媒体文件
｜
395
例程
15-1
：演示在
SVG
文件中使用
JavaScript
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink" width="600" height="600">
<script
type="text/ecmascript" ...
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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.
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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.