run javascript functions inside pug template

Our app variable (express application) has methods for handling requests and configuring how the application behaves. The second line creates an Express application by calling the top-level express() function. The first line imports the express module. Let’s look at what the code above is doing. In the console, we can see Application started and Listening on port 3000 and if we visit we can see HELLO WORLD. To run this script, go to your command prompt and enter the command node app.js in the project directory. The code above creates a basic Express application. log( 'Application started and Listening on port 3000') To use Express, we first need to install it via npm using the command below.Ĭonsole. Let’s create a basic Express example app. You can set up “middleware” for request processing.We can integrate with a template rendering engine (also called a view rendering engine in some articles) of our choice like Jade, Pug, EJS, etc.Ī template engine enables you to use static template files and at runtime change the values of variables in those files. You can use any compatible middleware, and you can structure the app as you wish, making it flexible. Instead of a large request handler function, Express allows us to handle requests by writing many small modular and maintainable functions.Įxpress is not opinionated, meaning Express does not enforce any “right way” of doing things. Image Credit Advantages of using Express with Node.jsĮxpress lets you take away a lot of the complexities of Node.js while adding helpful functions to a Node.js HTTP server.

Express makes it easier to write Node.js web applications. Node.js APIs can get complex and writing how to handle a single request can end up being over 50 lines of code. When creating a Node.js web application, we write a single JavaScript application which listens to requests from the browser, based on the request, the function will send back some data or an HTML web page.Ī request handler is a JavaScript function which takes a request and sends an appropriate response. This is where Node.js’s rich ecosystem comes to our aid.Įxpress.js (Express) is a light web framework which sits on top of Node.js and it adds functionality like ( middleware, routing, etc.) and simplicity to Node.js. Node.js is fast, portable, and written in JavaScript but it does not directly support common tasks such as handling requests, serving files, and handling HTTP methods such as GET and POST. Node.js is a JavaScript run time environment which is used to create server-side applications and tools.

Run javascript functions inside pug template