By Douglas Crockford
• usual expressions
• attractive features
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Moreover, if our preferred template engine hasn’t been packaged up to work with Express, it’s trivial to add the functionality ourselves. Since Jade is the default, we’ll use it for this example, but you should choose the template engine that best fits your application’s needs. submit(); }); If you decide to use Jade, note that whitespace in Jade is significant, so things are only nested logically if they’re nested physically. You may also note that there is no doctype or head in the template above.
You may also note that there is no doctype or head in the template above. No matter which template engine it uses, Express expects a layout file containing common page elements—we did the same thing with our parent template earlier. jade in our views directory, we’ve got our view layer wrapped up. The last thing we need to do is to create a controller. render("index"); }); } These controllers for the user object will route the application to the correct view, depending on the request and parameters received, or initiate tasks on the user model.
Creating Files on the Fly An in-depth exploration of any of the necessary modules is out of scope for this guide, but there are numerous libraries to help you generate other types of files from within Node. While these aren’t templates in the same sense as the templates we’ve looked at so far, they can map directly to a filename in a URL and be built and served in a way that’s invisible to the user, just like templates. For instance, you might have cause to dynamically generate image files to do resizing or add watermarks.