Template engine concept in Express - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a template engine in Express?

A template engine is a tool that helps create HTML pages by combining templates with data. It lets you write HTML with placeholders that get filled with real data when the page is shown.

beginner

How does a template engine improve web development?

It separates the design (HTML) from the data and logic. This makes it easier to update the look without changing the code and reuse templates for different data.

beginner

Name two popular template engines used with Express.

EJS (Embedded JavaScript) and Pug (formerly Jade) are two popular template engines for Express.

beginner

What is the role of placeholders in a template engine?

Placeholders are special markers in the template that get replaced by actual data when the page is rendered. They let you insert dynamic content like user names or lists.

beginner

How do you set a template engine in an Express app?

You use app.set('view engine', 'engineName') to tell Express which template engine to use, for example, app.set('view engine', 'ejs').

What does a template engine do in Express?

A Processes user authentication

B Handles database connections

C Manages server routing

D Combines HTML templates with data to create pages

A template engine merges templates with data to produce HTML pages.

Which of these is a popular template engine for Express?

A EJS

B React

C MongoDB

D Webpack

EJS is a popular template engine used with Express.

How do you tell Express which template engine to use?

A app.use('template engine', 'ejs')

B app.render('ejs')

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

D app.engine('ejs')

Use app.set('view engine', 'ejs') to set the template engine.

What is a placeholder in a template?

A A fixed HTML tag

B A marker replaced by data when rendering

C A CSS style rule

D A JavaScript function

Placeholders are markers in templates replaced by actual data.

Why use a template engine instead of plain HTML?

A To add dynamic content easily

B To speed up the server

C To store data in a database

D To write CSS styles

Template engines help add dynamic content by combining templates with data.

Explain what a template engine is and why it is useful in Express.

Think about how you create web pages that change based on data.

Describe how you set up and use a template engine in an Express app.

Focus on the steps to connect the engine and show pages.