variable in class name jade

问题

I can't set a variable name in a class in jade:

.flag_#{ session.locale } #{ session.locale }

I have:

<div class="flag_" >en</div>

And I'd like to have

<div class="flag_en" >en</div>

Thanks

回答1:

Try this (have not tested):

div(class="flag_#{ session.locale }") session.locale

回答2:

As for pug@2.0.0-alpha3 works this way:

div(class="flag_" + session.locale) session.locale

回答3:

Here's another approach:

mixin formButton(text, type, extra_classes)
    - var default_classes = 'btn btn-primary'
    if extra_classes
        - var classes = default_classes + ' ' + extra_classes
    else
        - var classes = default_classes

    if type
        button(class=classes type=type) !{text}
    else
        button(class=classes type="submit") !{text}

Example 1:

Usage:

+formButton('Text')

Result:

<button type="text" class="btn btn-primary" type="submit">Text</button>

Example 2:

Usage:

+formButton('Text', 'button')

Result:

<button type="text" class="btn btn-primary" type="button">Text</button>

Example 3:

Usage:

+formButton('Text', 'button', 'extra-class')

Result:

<button type="text" class="btn btn-primary extra-class" type="button">Text</button>

回答4:

You can also use conditional statements to do this like

  if liked == true
    span.like.active
  else
    span.like

来源：https://stackoverflow.com/questions/13668881/variable-in-class-name-jade