Jade javascript and variables

gistfile1.js

// rendering the content of a variable
li.tweet
    img(src= tweet.profile_image_url)
    h5= tweet.from_user_name
    p= tweet.text


// executing some JS and conditionally render one line or the other
- var tweets = link._tweets.length || null;
ul.meta
    li.meta-li
        a.meta-link.tweets.text-hide
            - if (tweets)
                i.meta-icon.icon-twitter
            - else
                i.meta-icon.inactive.icon-twitter

// variables are escaped before rendering. If we have a string of html that we want rendered as-is, use the following syntax
- var html = '<span>hi</span>';
p !{html}