Hello Friends ………… !
Welcome to our website https://skilltut.blogspot.com in which we are providing various 'tutorials' with the best of our knowldge. In the Previous Tutorial we have learned about ''html entities' ' and methods of using the same. Today in this Post we will be learning 'class' & 'id' attribute and the method of using the same.
Introduction
HTML 'class' and 'id' 'attributes' are fundamental elements in web development, allowing developers to uniquely identify and style elements within an HTML document. Understanding the differences and best practices for using these attributes can significantly enhance your web development skills.
What is the HTML id Attribute?
The 'id' 'attribute' is used to specify a unique identifier for an HTML element. Each 'id' must be unique within the HTML document, and it is often used to apply specific styles with 'CSS' or to manipulate the element with 'JavaScript'. The syntax for the id attribute is a hash symbol (#) followed by the id name.
Example:
html 🈁 
<html>
<body>
<head>
<style>
#myHeader {
background-color: lightblue;
color: black;
padding: 40px;
text-align: center;
}
</style>
</head>
<body>
<h1 id="myHeader">My Header</h1>
</html>
</body>
output 📌
My Header
Try It....🆓
You are invited to explore our user friendly simple code editor and executor by clicking on the ' 👉 Try It Button ' to access the above code. Subsequently, you can do experiment by the changing the value of the aforementioned HTML codes and observing the corresponding output of the same.
What is the HTML class Attribute?
The 'class' 'attribute', on the other hand, is used to apply the same style to multiple elements. Unlike the 'id' attribute, the 'class' attribute can be used on multiple elements within the same HTML document. The syntax for the class attribute is a period (.) followed by the class name.
Example:
html 🈁
<html>
<body>
<head>
<style>
.city {
background-color: tomato;
color: white;
padding: 10px;
}
</style>
</head>
<body>
<h2 class="city">London</h2>
<p>London is the capital of England.</p>
<h2 class="city">Paris</h2>
<p>Paris is the capital of France.</p>
<h2 class="city">Tokyo</h2>
<p>Tokyo is the capital of Japan.</p>
</html>
</body>
output 📌
London
London is the capital of England.
Paris
Paris is the capital of France.
Tokyo
Tokyo is the capital of Japan.
Try It....🆓
You are invited to explore our user friendly simple code editor and executor by clicking on the ' 👉 Try It Button ' to access the above code. Subsequently, you can do experiment by the changing the value of the aforementioned HTML codes and observing the corresponding output of the same.
Key Differences Between HTML id and class
Uniqueness: The 'id' attribute must be unique within the HTML document, while the class attribute can be used on multiple elements.
- CSS Selectors : The 'id' attribute is selected using the # symbol, while the 'class' attribute is selected using the . symbol.
- JavaScript Access : Both 'id' and 'class' attributes can be accessed using JavaScript, but 'id' is typically used for single elements, and class for multiple elements.
Best Practices for Using HTML id and class
- Use 'id' for unique elements: Ensure that each 'id' is unique within the HTML document.
- Use 'class' for reusable styles: Apply the 'class' attribute to multiple elements that share the same style.
- Consistent Naming: Use clear and consistent naming conventions for both 'id' and 'class' attributes to make your code more readable and maintainable.
- Avoid Inline Styles: Instead of using 'inline' styles, use 'id' and 'class' attributes to separate content from presentation.
Conclusion
Understanding and effectively using HTML 'class' and 'id' attributes is crucial for creating well-structured and maintainable web pages. By following best practices and leveraging these attributes, you can enhance both the functionality and aesthetics of your web projects
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