插值法(Interpolation)
¥Interpolation
Pug 提供了满足你各种不同插值需求的运算符。
¥Pug provides operators for a variety of your different interpolative needs.
字符串插值，转义(String Interpolation, Escaped)
¥String Interpolation, Escaped
考虑以下模板局部变量的放置：title、author 和 theGreat。
¥Consider the placement of the following template’s locals: title, author, and theGreat.
title 遵循评估本地模板的基本模式，但 #{ 和 } 之间的代码被评估、转义，并将结果缓冲到正在渲染的模板的输出中。
¥title follows the basic pattern for evaluating a template local, but the code in between #{ and } is evaluated, escaped, and the result buffered into the output of the template being rendered.
这可以是任何有效的 Javascript 表达式，因此你可以做任何感觉好的事情。
¥This can be any valid Javascript expression, so you can do whatever feels good.
Pug 足够聪明，可以找出表达式的结束位置，因此你甚至可以包含 } 而无需转义。
¥Pug is smart enough to figure out where the expression ends, so you can even include } without escaping.
如果你需要逐字包含 #{，你可以转义它，或使用插值。（太元了！）
¥If you need to include a verbatim #{, you can either escape it, or use interpolation. (So meta!)
字符串插值，未转义(String Interpolation, Unescaped)
¥String Interpolation, Unescaped
你不必谨慎行事。你也可以将未转义的值缓冲到模板中。
¥You don’t have to play it safe. You can buffer unescaped values into your templates, too.
注意
请记住，如果未转义的内容是来自用户的新鲜内容，则将未转义的内容缓冲到模板中可能会带来很大的风险。永远不要相信用户输入！
¥Keep in mind that buffering unescaped content into your templates can be mighty risky if that content comes fresh from your users. Never trust user input!
标签插值(Tag Interpolation)
¥Tag Interpolation
插值不仅适用于 JavaScript 值，也适用于 Pug。只需使用标签插值语法，如下所示：
¥Interpolation works not only on JavaScript values, but on Pug as well. Just use the tag interpolation syntax, like so:
你可以通过编写与你的 Pug 内联的 HTML 标签来完成同样的事情…但是，编写 Pug 的意义何在？将内联 Pug 标签声明封装在 #[ 和 ] 中，它将被评估并缓冲到其包含标签的内容中。
¥You could accomplish the same thing by writing an HTML tag inline with your Pug…but then, what’s the point of writing the Pug? Wrap an inline Pug tag declaration in #[ and ], and it’ll be evaluated and buffered into the content of its containing tag.
空白控制(Whitespace Control)
¥Whitespace Control
标签插值语法对于内联标签特别有用，其中标签前后的空格很重要。
¥The tag interpolation syntax is especially useful for inline tags, where whitespace before and after the tag is significant.
然而，默认情况下，Pug 会删除标签前后的所有空格。查看以下示例：
¥By default, however, Pug removes all spaces before and after tags. Check out the following example:
有关此主题的更多讨论，请参阅 纯文本 页面中的空白部分。
¥See the whitespace section in the Plain Text page for more discussion on this topic.
属性插值(Attribute Interpolation)
¥Attribute Interpolation
注意
以前版本的 Pug/Jade 支持插值语法，例如：
¥Previous versions of Pug/Jade supported an interpolation syntax such as:
a(href="/#{url}") Link
不再支持此语法。替代方案如下。（有关 Pug v2 和以前版本之间其他不兼容性的更多信息，请查看我们的[迁移指南]。）
¥This syntax is no longer supported. Alternatives are found below. (Check our [migration guide] for more information on other incompatibilities between Pug v2 and previous versions.)
你可以使用以下一些替代方法在属性中包含变量：
¥Here are some alternatives you can use to include variables in your attribute:
-
只需在 JavaScript 中编写属性：
¥Simply write the attribute in JavaScript:
-
如果你的 JavaScript 运行时支持 ES2015 [模板字符串]（包括 Node.js/io.js 1.0.0 及更高版本），你还可以使用其语法来简化你的属性：
¥If your JavaScript runtime supports ES2015 [template strings] (including Node.js/io.js 1.0.0 and later), you can also use its syntax to simplify your attributes: