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JavaScript 经典实例:第三版
book

JavaScript 经典实例:第三版

by Adam D. Scott, Matthew MacDonald, Shelley Powers
September 2022
Intermediate to advanced
585 pages
8h 17m
Chinese
China Electric Power Press Ltd.
Content preview from JavaScript 经典实例:第三版
398
15
15.2
在网页脚本中访问
SVG
15.2.1
问题
你想使用网页内的脚本修改
SVG
元素的内容。
15.2.2
方案
如果
SVG
直接内嵌在网页中,访问
SVG
元素及其属性的方式与访问普通的网页元
素一样。
const
square = document.getElementById("square");
square.setAttribute("width", "500");
然而,如果是通过
object
元素嵌入页面的外部
SVG
文件,首先要获取外部
SVG
文件的文档对象,然后才能访问
SVG
元素。这里需要检测对象,因为不同浏览器的
处理方式不同。
window.onload =
function
onLoad() {
const
object = document.getElementById('object');
let
svgdoc;
try
{
svgdoc = object.contentDocument;
}
catch
(e) {
try
{
svgdoc = object.getSVGDocument();
}
catch
(err) {
console.log(err, 'SVG in object not supported in this environment');
}
}
if
(!svgdoc)
return
;
const
square = svgdoc.getElementById('square');
square.setAttribute('width', ...
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Publisher Resources

ISBN: 9787519869601