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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412
第
16
章
编写
Web
应用
以前，我们使用
JavaScript
为网页添加简单的交互效果。如今，使用
JavaScript
可
以构建复杂且功能齐全的软件应用，运行在
Web
浏览器中，例如地图、电子邮件客
户端、流媒体视频网站、实时聊天应用等。“网站”和“应用”之间的界线并不明显，
你可以把应用理解为根据用户输入返回相应结果的网站。
开发人员开发出来的应用可以立即上线，向世人开放，但是这个过程也有一定的挑
战。随着应用代码基的增长，我们要把代码基拆分成更小的模块，确保用户接收到
优化后的代码包。我们还要实现与原生应用相当的功能和体验，例如离线功能、通
知和应用图标。幸好，如今的
JavaScript
和浏览器
API
提供了这些增强体验的功能。
16.1
打包
JavaScript
16.1.1
问题
你想在浏览器环境中使用
JavaScript
模块。
16.1.2
方案
使用
JavaScript
原生模块或者构建工具，例如
Webpack
（
https://webpack.js.org
）。
编写
Web
应用
｜
413
所有现代浏览器都支持
JavaScript
原生模块（
https://oreil.ly/FhPq9
）。假如有一个
简单的模块，名为
mod.js
，导出一个值，如下所示。
export const
name = 'Riley'; ...
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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.
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.