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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426
｜
第
16
章
渐进式
Web
应用是
Web
向前迈出的一大步，而且与所用的框架无关，既可以使用
纯
HTML
、
CSS
和
JavaScript
构建，也可以使用最新的
JavaScript
框架。本节只对
相关技术做了简单的介绍。
Tal Alter
写 的《
Building Progressive Web Apps
》（
O
’
Reilly
）
一书深入讲解了渐进式
Web
应用的特性和功能。
16.4
测试和剖析渐进式
Web
应用
16.4.1
问题
你想测试渐进式
Web
应用有没有满足所有需求。
16.4.2
方案
使用
Lighthouse
（
https://oreil.ly/hEdHB
）审查性能、无障碍功能、最佳实践、
SEO
和渐进式
Web
应用准则。若想使用
Lighthouse
，在
Google Chrome
开发者工具中打
开“
Lighthouse
”标签页最简单。打开网站（线上或本地
Web
服务器都可以），然
后点击“生成报告”（见图
16-4
）。
图
16
-
4
：Chrome 开发者工具中的 Lighthouse
Lighthouse
将生成一份报告，为得分较低的项目提供改进建议（见图
16-5
和图
16-6
）。
在
Chrome
开发者工具中如何使用
Lighthouse
剖析渐进式
Web
应用之外的网
站，详见
11.4
节。
编写
Web
应用
｜
427
图
16 ...
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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.