How to install and configure Handlebar.js ?

You can install and configure Handlebar.js using npm or yarn:

npm install handlebars
# or
yarn add handlebars

You can then use Handlebars using require
const Handlebars = require("handlebars");
const template = Handlebars.compile("Name: {{name}}");
console.log(template({ name: "Nils" }));

You can configure express-handlebars as our view engine:

app.engine('hbs', exphbs({
    defaultLayout: 'main',
    extname: '.hbs'
}));

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

By default, the extension for Handlebars templates is .handlebars. But in the settings here, we've changed it to .hbs via the extreme flag because it's shorter.