玉无法读取未定义的属性“长度" [英] Jade Cannot read property 'length' of undefined

问题描述

为什么menuItems 在下面的代码中没有定义?

Why menuItems is undefined in the following code?

- var menuItems = ["Main","Contacts","About"]
mixin showItems(items)
    ul
        each item in items
            li: a(href="#") #{item}
extend layout
block content
    +showItems(menuItems)

我收到以下错误:

无法读取未定义的属性长度"

Cannot read property 'length' of undefined

推荐答案

- var menuItems = ["Main","Contacts","About"]
mixin showItems(items)
    ul
        each item in items
            li: a(href="#") #{item}
extends layout
block content
    +showItems(menuItems)

有一个错字扩展布局"

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