April 2020
Intermediate to advanced
177 pages
1h 45m
Chinese
Content preview from 精通模块化JavaScript
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109
第 5 章
模块化模式与实践
本章将介绍一些最新的语言特性，以及如何利用这些特性减少应用程序的
复杂性，同时还将分析具体的编码方式和规范，以帮助你开发简单的替代
方案来解决复杂的问题。
5.1
利用现代
JavaScript
如果能够合理使用最新的
JavaScript
语言特性，可以有效减少程序代码量，
最主要是能够绕开语言本身的限制。也就是说，当消除了样板文件和重复
代码后，我们在阅读一段代码的过程中能提取出大量有价值的信息。
5.1.1
模板字面量
在
ES6
之前，
JavaScript
社区提出了
6
种方法来实现多行字符串：从使用“
\
”
转义字符或者“
+
”算术运算符来连接字符串，到使用
Array#join
或在函数
中注释的字符串表示形式，所有这些只是为了提供对多行字符串的支持。
110
｜
第
5
章
模块化模式与实践
此外，虽然无法直接在字符串中插入变量，但是将变量与字符串连接起来
却很容易 ：
'Hello ' + name + ', I\'m Nicolás!'
ES6
中引入了模板字面量（
template literal
），这种语法使用原生的语言特
性来解决多行字符串问题，无须再使用其他
hack
手段。
与字符串不同，有了模板字面量，我们可以使用改进的语法来插入表达式，
这样做涉及的转义操作更少，这要归功于所用的反引号而不是在英文中出 ...
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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.