CSS Selectors – manipulate HTML element : Chapter 3

CSS Selectors

CSS selectors allow you to select and manipulate HTML element(s).

CSS selectors are used to “find” (or select) HTML elements based on their id, classes, types, attributes, values of attributes and much more.


1. The element Selector

The element selector selects elements based on the element name.You can select all <p> elements on a page like this: (all <p> elements will be center-aligned, with a red text color)

Example

p {
text-align: center;
color: red;
}

 

2. The id Selector

The id selector uses the id attribute of an HTML tag to find the specific element.

An id should be unique within a page, so you should use the id selector when you want to find a single, unique element.

To find an element with a specific id, write a hash character, followed by the id of the element.

The style rule below will be applied to the HTML element with id=”para1″:

Example

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

 

3. The class Selector

The class selector finds elements with the specific class.

The class selector uses the HTML class attribute.

To find elements with a specific class, write a period character, followed by the name of the class:

In the example below, all HTML elements with will be center-aligned:

Example

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

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

In the example below, all p elements with will be center-aligned:

Example

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

4. Grouping Selectors

In style sheets there are often elements with the same style:

h1 {
text-align: center;
color: red;
}h2 {
text-align: center;
color: red;
}p {
text-align: center;
color: red;
}

To minimize the code, you can group selectors.

To group selectors, separate each selector with a comma.

In the example below we have grouped the selectors from the code above:

Example

h1, h2, p {
text-align: center;
color: red;
}

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    What is CSS selectors? CSS selectors allow you to select and manipulate HTML elements. CSS selectors are used to "find" (or select) HTML elements based on their id, class, type, attribute, and more. There are many types of selectors. We will describe here each of them with example. Element Selectors:…
    Tags: html, red, color, selectors, text-align, center, elements, element, example, selector

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