Question
Answer and Explanation
The short answer is: you should not put a script directly inside CSS. CSS (Cascading Style Sheets) is designed for styling web pages, not for executing scripts. Scripts, typically written in JavaScript, are used for adding interactivity and dynamic behavior to a website.
Here's a more detailed explanation:
1. CSS's Purpose: CSS is specifically for defining the visual presentation of HTML elements. It handles aspects like colors, fonts, layouts, and responsiveness. It does not have the capability to execute code or perform logic.
2. JavaScript's Purpose: JavaScript is a scripting language that enables dynamic content, user interactions, and data manipulation. It's the language used to make web pages interactive.
3. Why Not Mix Them? Mixing CSS and JavaScript would violate the principle of separation of concerns. This principle suggests that different aspects of a web page (structure, style, and behavior) should be handled by different technologies. This makes code more maintainable, readable, and easier to debug.
4. Where to Put JavaScript: JavaScript code should be placed within <script> tags in your HTML document. These tags can be placed in the <head> or <body> section of your HTML. It's generally recommended to place them at the end of the <body> to avoid blocking the rendering of the page.
5. Example of Correct Usage:
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>Hello, World!</h1>
<button id="myButton">Click Me</button>
<script src="script.js"></script>
</body>
</html>
In this example, styles.css contains CSS rules, and script.js contains JavaScript code. The HTML file links to both.
6. CSS's Limited Scripting Capabilities: While CSS does have some limited scripting-like features (e.g., CSS animations and transitions), these are not full-fledged scripting capabilities. They are designed for visual effects, not for general-purpose programming.
In summary, keep your CSS for styling and your JavaScript for scripting. This separation of concerns will lead to cleaner, more maintainable, and more efficient web development.