（不）将局部变量传递给Express中的Jade模板（node.js）((not) passing a local variables to Jade templates in Express (no

（不）将局部变量传递给Express中的Jade模板（node.js）((not) passing a local variables to Jade templates in Express (node.js))

这是我的场景：我有一个login.jade模板，我在其中验证用户身份。在那个模板里面，我有几个if：

- if (badLogin) div#loginErr | <strong>Please try again</strong> | | The password or username you entered is incorrect. - if (loginError) div#loginErr | <strong>Please try again later</strong> | | Our authentication service isn't available at the moment.

在Express I中，我必须声明可能在该Jade模板中使用的所有局部变量。否则我得到：

loginError is not defined

我的观点是，如果在Jade模板中我将包含一个包含局部变量的10'if'语句而不是渲染，我将不得不总是传递这10个变量，即使我只在该特定情况下使用一个。

我只是想如果我没有将任何变量传递给Jade模板，那么“if（var）”的结果将只是“false”。

有可能在这周围工作吗？

Here is my scenario: I have a login.jade template where I authenticate users. Inside that template I have a few if's like:

In Express I ALWAYS have to declare ALL local variables that MIGHT be used in that Jade template. Otherwise I get:

loginError is not defined

My point is that if in Jade template I would have 10 'if' statements containing a local variable than while rendering I would have to always pass this 10 variables EVEN IF I would only use one in that particular case.

I just thought that if I do not pass any variable to Jade template that the result of "if(var)" would be just "false".

Any chances of working this around?