As web applications mature and develop, more and more developers are starting to use Node.js to build back-end applications. Node.js is an open source server-side JavaScript environment for building high-performance and scalable web applications. It provides some very useful modules and libraries, including a template engine capable of generating HTML.
In this article, we will explore how to use Node.js to dynamically modify HTML. We'll first introduce some commonly used template engines and then discuss how to use them with Node.js. Finally, we will demonstrate some practical examples to help you better understand and practice these techniques.
Commonly used template engines
Before starting to use template engines, we need to understand the differences between different template engines and their advantages and disadvantages. The following are some commonly used template engines:
- EJS: EJS is a JavaScript-based template engine that can help us embed dynamic data in HTML code using JavaScript syntax. Its main advantage is that it is easy to learn and use, while you can also use it for client-side and server-side rendering.
- Handlebars: Handlebars is another JavaScript-based template engine that allows us to embed dynamic data in HTML code using handlebars syntax. Its main advantages are great compatibility, as it can be used for both client-side and server-side rendering, and has very good performance.
- Jade: Jade is a character-based template engine that helps us embed dynamic data in HTML code using indentation and spaces. Its advantages are concise syntax and easy maintenance.
Using Template Engines with Node.js
Now that we understand the different template engines, we can start using them to dynamically modify HTML. Here are some steps for using a template engine with Node.js:
- Install the template engine: You first need to install the template engine of your choice. In this example, we will use EJS as our template engine. To install EJS, run the following command:
npm install ejs --save
- Configure Express application: To create our application, we will use the Express framework for Node.js. To start using Express, you need to install it and then set it up in your application. Here is the sample code:
const express = require('express'); const app = express(); app.set('views', './views'); app.set('view engine', 'ejs'); app.get('/users', (req, res) => { const users = [ { name: 'Alice', email: 'alice@example.com' }, { name: 'Bob', email: 'bob@example.com' }, { name: 'Charlie', email: 'charlie@example.com' }, ]; res.render('users', { users }); }); app.listen(3000, () => { console.log('listening on port 3000'); });
In this application, we set up the application's view directory and view engine, and provide a simple route handler that will render a named A view for "users" and pass an object to the view that contains an array named "users".
- Create view file: Next, we need to create a view file named "users.ejs". This file will contain dynamic data and HTML code. The following is the sample code:
nbsp;html> <title>Users</title> <h1 id="Users">Users</h1>
-
{ %>
- -
In this view file, we use the syntax of the EJS template engine to embed dynamic data. We used a forEach loop to loop through the users array and used the tag in the HTML code to execute the JavaScript code. We also use the tag to embed user data.
- Run the application: Finally, we need to run our application. To run the application, run the following command:
node app.js
Then open a browser and visit http://localhost:3000/users. You should be able to see a page with three users, each including a name and email address.
Summary
In this article, we explored how to dynamically modify HTML using Node.js and a template engine. We introduced some commonly used template engines and showed how to use EJS to combine them. By using these technologies, you can easily generate dynamic HTML from your web applications and provide a powerful user experience.
The above is the detailed content of How to dynamically modify html in nodejs. For more information, please follow other related articles on the PHP Chinese website!

The article discusses useEffect in React, a hook for managing side effects like data fetching and DOM manipulation in functional components. It explains usage, common side effects, and cleanup to prevent issues like memory leaks.

Lazy loading delays loading of content until needed, improving web performance and user experience by reducing initial load times and server load.

Higher-order functions in JavaScript enhance code conciseness, reusability, modularity, and performance through abstraction, common patterns, and optimization techniques.

The article discusses currying in JavaScript, a technique transforming multi-argument functions into single-argument function sequences. It explores currying's implementation, benefits like partial application, and practical uses, enhancing code read

The article explains React's reconciliation algorithm, which efficiently updates the DOM by comparing Virtual DOM trees. It discusses performance benefits, optimization techniques, and impacts on user experience.Character count: 159

The article explains useContext in React, which simplifies state management by avoiding prop drilling. It discusses benefits like centralized state and performance improvements through reduced re-renders.

Article discusses preventing default behavior in event handlers using preventDefault() method, its benefits like enhanced user experience, and potential issues like accessibility concerns.

The article discusses the advantages and disadvantages of controlled and uncontrolled components in React, focusing on aspects like predictability, performance, and use cases. It advises on factors to consider when choosing between them.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

Notepad++7.3.1
Easy-to-use and free code editor

Atom editor mac version download
The most popular open source editor
