Selectors

Selectors

CSS selectors are used to “find” (or select) the HTML elements you want to style.

Element Selector

The element selector selects HTML elements based on the element name.

Here, all <p> elements on the page will be center-aligned, with a red text color:

p {
text-align: center;
color: red;
}

Id Selector

The id selector uses the id attribute of an HTML element to select a specific element.

The id of an element is unique within a page, so the id selector is used to select one unique element!

To select an element with a specific id, write a hash (#) character, followed by the id of the element.

The CSS rule below will be applied to the HTML element with id="para1":

#para1 {
text-align: center;
color: red;
}

Note: An id name cannot start with a number!

Class Selector

The class selector selects HTML elements with a specific class attribute.

To select elements with a specific class, write a period (.) character, followed by the class name.

In this example, all HTML elements with class="center" will be red and center-aligned:

.center {
text-align: center;
color: red;
}

You can also specify that only specific HTML elements should be affected by a class.

In this example only <p> elements with class="center" will be center-aligned:

p.center {
text-align: center;
color: red;
}
Interested in helping build Docs? Read the Contribution Guide or share your feedback.

Learn CSS on Codecademy