Template engines handle the task of interpolating data into HTML code while providing some features (like partials in EJS) that would have been difficult to replicate by concatenating strings. Template enginesĪccording to Wikipedia’s definition, a template engine is software designed to combine templates with a data model to produce, in our case, real HTML code. First, we’ll cover the basics of template engines and setting up EJS, but we will move on to a more advanced guide to using EJS in your Node apps. In this article, I will walk you through a detailed guide to templating your Node application with EJS. As the name suggests, it lets us embed JavaScript code in a template language that is then used to generate HTML. But if you want to write applications with significant HTML code and dynamic content, you are better off using tools that are designed for that purpose, like template engines.ĮJS (Embedded JavaScript Templating) is one of the most popular template engines for JavaScript. If you are writing a backend application in Node.js and you want to send HTML back to the clients interacting with it, then you must find a way to “mix in,” or interpolate, the processed data into the HTML files you are sending.įor simple data interpolation and testing purposes, one way to do this is by concatenating HTML strings with data or using the template strings in JavaScript. How to use EJS to template your Node.js application Samuel Olusola Follow Software engineer (JS stack, GoLang incoming…) and student of computer science at the University of Lagos.
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