CCS Class vs Id

When it comes to styling HTML elements using CSS, we have two ways to select elements: by class or by id. While these two selectors achieve similar results, their methods of implementation and practical uses are often different.

CSS Classes

CSS classes are used to group together elements that share similar styling, such as font or background color. A class selector begins with a period (".") followed by the name of the class. In HTML, assign a class to an element with the "class" attribute.

<p class="text">Hello, world!</p>

In this example, the "text" class is used to style a paragraph element. You can then target this class selector in your CSS stylesheet to apply specific styles to it.

.text {
    font-size: 16px;
    color: #333333;
    background-color: #f2f2f2;
}

CSS Ids

Ids are unique identifiers that are applied to individual elements on a webpage, such as a header or a footer. An id selector begins with a pound sign ("#") followed by the name of the id. In HTML, assign an id to an element with the "id" attribute.

<footer id="contact">
    <p>Contact us:</p>
    <ul>
        <li>1234 Main Street</li>
        <li>Anytown, USA</li>
        <li>555-555-5555</li>
    </ul>
</footer>

In this example, the "contact" id is used to apply specific styling to the footer element. You can then target this id selector in your CSS stylesheet to apply specific styles to it.

#contact {
    background-color: #f2f2f2;
    padding: 20px;
    text-align: center;
}

The main difference between classes and ids is that classes can be applied to multiple elements, while ids should only be used for unique elements. Additionally, ids have a higher specificity than classes, meaning that styles specified for an id selector will override styles specified for a class selector.

In conclusion, while classes and ids are similar in their functionality, they have different methods of implementation and use cases. By understanding the differences between the two, you can better apply them to your web design projects.