Passing A Variable From Node Js To Html

When working on web development projects using Node.js, there might be times when you need to pass a variable from your Node.js server to your HTML page. This seamless transfer of data is essential for dynamic and interactive web applications. In this article, we will walk you through the process of passing a variable from Node.js to HTML effortlessly.

To pass a variable from your Node.js server to an HTML file, you can utilize a template engine such as EJS or Handlebars. These template engines allow you to inject dynamic content into your HTML pages easily. Let's dive into a simple example using EJS as our template engine.

First, ensure that you have EJS installed in your Node.js project. You can install it via npm by running the following command:

npm install ejs

Next, let's set up a basic Node.js server that renders an HTML file using EJS and passes a variable to it. Suppose we want to pass a variable called `message` with the value 'Hello, World!' to our HTML file.

Here's a snippet of code to demonstrate how you can achieve this:

const express = require('express');
const ejs = require('ejs');
const app = express();

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

app.get('/', (req, res) => {
  const message = 'Hello, World!';
  res.render('index', { message });
});

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});

In this code snippet, we are setting up a basic Express server that uses EJS as the templating engine. We have defined a route that renders an `index.ejs` file and passes the `message` variable to it.

Now, let's create an `index.ejs` file in a directory named `views` in your project root folder. Here's an example of how the `index.ejs` file might look:

<title>Passing Variable to HTML</title>


    <h1></h1>

In the `index.ejs` file, we use `` to display the value of the `message` variable that we passed from our Node.js server.

You can start your Node.js server by running the script, and if you navigate to `http://localhost:3000`, you should see 'Hello, World!' displayed on the webpage.

By following these steps, you can seamlessly pass variables from your Node.js server to your HTML files using a template engine like EJS. This practice is crucial for creating dynamic and data-driven web applications. Experiment with different variables and templates to enhance the interactivity of your web projects!