Typeof bin = 'undefined' ? bar world!!! : bar bin Solution 2: using tenary operators for validation of field: html This solution is interesting when you have to import a file or a block of mixed code between variables and content. Solution 1: using a conditioner if else to check whether or not the element exists: html Following example shows how we can use this feature −Īpp.I found some solutions that depend on the form of development in which it is being applied: Instead of copying that to every view we create, we can use the include feature. For example, if you see a news website, the header with logo and categories is always fixed. Pug provides a very intuitive way to create components for a web page. But if we don’t pass any object or pass one with no user key, then we will get a signup link. When we render this using our routes, we can pass an object as in the following program − To achieve this, we can define a simple template like − If a User is logged in, the page should display 'Hi, User' and if not, then the 'Login/Sign Up' link. We can use conditional statements and looping constructs as well. The above code will display the following output.

This method of using values is called interpolation. For example, in the above example, if we wanted to put Greetings from TutorialsPoint, then we could have done the following. To run this page, add the following route to your app −Īpp.get('/first_template', function(req, res) syntax.

Inside that create a file called first_view.pug, and enter the following data in it. Add the following code to your index.js file. Now that Pug is installed, set it as the templating engine for your app.

To use Pug with Express, we need to install it, There is a lot of ground to cover on this. Pug is a very powerful templating engine which has a variety of features including filters, includes, inheritance, interpolation, etc. Templating engines are used to remove the cluttering of our server code with HTML, concatenating strings wildly to existing HTML templates.

Pug template rendering