Steps to Run the JavaScript Code
Here are two common ways to run JavaScript code:
Using JavaScript in a web project:
Using the browser console: Most web browsers come with a built-in console where you can directly execute JavaScript code. Open your browser’s developer tools (usually by pressing F12) and look for the console tab. You can then type your JavaScript code and press Enter to see the output.
Creating an HTML file: You can create a simple HTML file with a <script> tag to embed your JavaScript code. The browser will interpret the code when the webpage loads.
Here’s a basic example:
<!DOCTYPE html>
<html>
<head>
<title>My First JavaScript Code</title>
</head>
<body>
<script>
let message = "Hello from my HTML file!";
console.log(message);
</script>
</body>
</html>
Save this code as an HTML file (e.g., index.html) and open it in your browser. You won’t see any direct changes on the webpage, but you can access the console to see the output: “Hello from my HTML file!” or you can get the same result my adding external javascript to the script tag in HTML.
Using JavaScript outside the browser (Node.js)
Step 1: Node.js environment: If your project involves running JavaScript code outside a web browser, you can leverage Node.js. Node.js is a JavaScript runtime environment that allows you to execute JavaScript code on your computer.
Step 2: Create JavaScript files: Similar to web development, you’ll create JavaScript files (.js extension) containing your code.
Step 3: Run JavaScript code: You can run JavaScript code using the Node.js command line or integrate it into your project using Node.js modules.
Example: Here’s a simple JavaScript program that logs a message to the browser console:
Console.log("w3wiki");
Output: When you run this code in a browser’s developer console or an appropriate JavaScript execution environment, it will display:
w3wiki
Getting Started with JavaScript
JavaScript is a lightweight, single-threaded, dynamically typed, interpreted programming language with object-oriented capabilities. Primarily JavaScript is used to add interactivity and dynamism to web pages. It breathes life into static HTML and CSS, enabling features like dynamic content updates, user interactions, and animations.
However, JavaScript’s reach extends beyond web development. It’s also employed in server-side development with frameworks like Node.js and for creating mobile applications through frameworks like React Native. In this article, we will go through the fundamentals of JavaScript.
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