Advanced Templating Engines for Express.js

Introduction

While basic templating engines like EJS and Pug are great for simple views, large-scale Express applications often require more advanced templating architectures to handle complex UI logic, component reusability, and server-side performance.

1. Nunjucks

Nunjucks is a powerful templating engine created by Mozilla. It is heavily inspired by Jinja2 (Python) and offers advanced features like template inheritance and asynchronous rendering.

npm install nunjucks

const express = require('express');
const nunjucks = require('nunjucks');

const app = express();

nunjucks.configure('views', {
    autoescape: true,
    express: app
});

app.get('/', (req, res) => {
    res.render('index.html', { title: 'Advanced Templating' });
});

Template Inheritance

Nunjucks shines with inheritance. You can define a base layout (base.html) with {% block content %} and then extend it in child templates using {% extends "base.html" %}.

2. Marko

Marko, developed by eBay, is designed for extremely fast server-side rendering and efficient client-side updates. It blurs the line between traditional templating and modern UI components.

It compiles templates down to highly optimized JavaScript and supports streaming, meaning the server can send chunks of HTML to the browser before the entire page is fully rendered, drastically improving Time to First Byte (TTFB).

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