Lecture 250:- Setting Up A Template Engine

To set up a template engine in an Express.js application, we need to follow these steps:

1. Install the template engine module using NPM. For example, if we want to use the EJS template engine, we can install it with the following command:

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   npm install ejs

2. Require the template engine module in our server file:

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   const ejs = require('ejs');

3. Set the view engine to the name of the template engine:

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   app.set('view engine', 'ejs');

4. Create a views directory in the root of our project and add the template files with the extension of the template engine we are using. For example, if we are using EJS, the extension will be .ejs.

5. Use the render method of the response object to render the template file and pass data as a second argument. For example:

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   app.get('/', (req, res) => {  const data = { name: 'John' };  res.render('index', data); });

   In this example, we are rendering the index.ejs template file and passing the data object to it.

The above steps assume that we are using the EJS template engine. If we are using a different template engine, the steps may vary slightly.