With the continuous development of front-end development technology, more and more developers are beginning to use Node.js to build server-side applications. Node.js provides a convenient way to handle tasks such as HTTP requests and interacting with databases. At the same time, Node.js also provides a convenient way to integrate server-side data into front-end HTML pages. This article will introduce how to use Node.js combined with HTML to develop web applications.
1. Overview of Node.js
Node.js is a very popular server-side programming language, which is developed based on the JavaScript language. The biggest advantage of Node.js is that it can run JavaScript code directly on the server side. This feature once attracted much attention to Node.js. Node.js has a wide range of application scenarios, not only for web server development, but also for command line tools, desktop applications and other fields.
2. Overview of HTML
HTML is a markup language used to create Web pages. HTML is the basic structure and style definition of a Web page. It can define the title, paragraph, link, table, picture, video and other elements of the page. HTML pages can be parsed and rendered by a browser, and users can view and interact with the page on the browser.
3. Combining Node.js with HTML
There are many ways to combine Node.js with HTML. The most common way is to embed server-side data into HTML through a template engine. page. A template engine is a tool for generating dynamic HTML pages. It allows developers to generate HTML pages on the server side and integrate dynamic data into HTML pages.
Let’s look at an example using Node.js combined with a template engine. First, we need to install a template engine library, here we choose to use the EJS template engine.
1. Install EJS template engine
npm install ejs --save
2. Create a simple Node.js program
const express = require('express')
const app = express()
const port = 3000
app.set('view engine', 'ejs')
app.get('/', (req, res) => {
res.render('index', { title: 'Hello World', message: 'Hello World from Node.js!' })
})
app.listen(port, () => {
console.log(`Server is running on port ${port}.`)
}) In this code, we use express framework to create a web application , and render the EJS template file named index on the root path. In the template file, we can use template tags to insert dynamic data, as shown below:
<html>
<head>
<title><%= title %></title>
</head>
<body>
<h1><%= message %></h1>
</body>
</html>In this template file, we added two template tags: is used to display the page title, <code> is used to display the page content. These tags will be rendered server-side and populate the template file with dynamic data.
3. Start the application
node index.js
4. Visit the page
Visit http://localhost:3000 in the browser, you will see a simple page , which contains the dynamic data you set on the server side.
Through the above steps, we successfully combined Node.js and HTML to create a simple web application. In actual development, we can use more template engines and frameworks to implement more complex functions.
4. Summary
This article introduces how to use Node.js and HTML to build Web applications, and embed server-side dynamic data into HTML pages through a template engine. This approach is very common in web application development and allows us to quickly build a complete application. It should be noted that in actual development, we need to choose an appropriate template engine and framework to meet the needs of the project.
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