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Types of Selectors in CSS | Theoretical Explanation and Examples

Industry Articles

2023-03-14 15:15

In this blog post, we will talk about the basic types of selectors in CSS being used in the HTML language and how they are used in web documents.

CSS is a language for styling HTML, and it can be used to style a document (such as a web page) or a web application (such as an app). A selector is a CSS property that lets you choose which element to apply a style to. You can use selectors to target elements in your HTML, and then apply styles to them easily.

A CSS selector is made up of two parts: the first part is called the "selector" and it tells us what kind of element we want to match against; this could be an ID or name, but usually, it's something like: #header. The second part is called "the type", which defines how many times we want our selector to match (e.g.: before). The way that this work together means that you have access to all kinds of different ways for selecting specific types of HTML elements without having to write JavaScript code!

Types of selectors in CSS

1. Universal Selectors

Universal selectors are the most common type of selector. They allow you to target elements based on their class or ID, regardless of the other HTML elements around them.

2. Attribute selectors

The attribute selectors are used to select elements based on their attributes. They work by looking at the attribute values of the parent element and then checking if that value matches one of the setters in your CSS selector.

• [attribute]: Attribute names are case-sensitive, so we don't need to worry about uppercase and lowercase letters when using them here.

•: attribute name: Attribute name must match exactly, but can contain spaces between words (e.g., class="description"). You can also use multiple attribute names separated by commas or semicolons as long as you make sure they're unique (e.g., class="description" style="background-color: red;").

3. Pseudo-Class Selectors

Pseudo-class selectors are used to match elements based on the class attribute. This can be used with CSS3 media queries, but it's not necessary. One can use a pseudo-class selector to target all elements on your page.

4. Pseudo-Element Selectors

Pseudo-element selectors are the most flexible, but also the most complex. They can be used to match elements that do not exist in the document. For example, if you have HTML with a paragraph tag and want to format it as bold:```html this is the bold text```.

5. Element Selectors

Element selectors are the most common type of selector in CSS. They're used to identify specific elements on a page, such as a tag or a tag. Element selectors can also be used in HTML, JavaScript, and even Markdown. Common ones are <font> tag, <u> tag, <textarea> tag, <h1>-<h6> tags, <p> tags, <title> tag, <a> tag, <b> tag, and <body> tag,

6. Universal Selectors

Universal selectors are used to select all elements that match the selector and have a specific attribute or a specific class. For example: [a]{color: red}

This selector would select all links with an ID of "a", regardless of whether they were links within your site or not. You could also use this selector in combination with other universal selectors such as link, or visited instead of just using them as stand-alone rulesets without any additional attributes attached.

7. Group Selectors

Group selectors are used to select elements that belong to the same group. You can use them if you want to target a group of elements, but not all of them.

8. Attribute Selectors

Attribute selectors are used to select elements based on their attributes. For example, if you want to link an image with a caption and description, you can use the following markup: You can then use CSS to style it as follows: The first selector will select all images with the class “my-class” applied. The second selector will only apply styles for images with the id "images/man1".

Whichever software development language the developers might be using, it always comes down to the reality of how well the software is being tested and whether the techniques used are according to real-world scenarios. In this regard, WeTest provides state-of-the-art testing services including PC Game Solutions. These solutions are provided by the company’s experienced teams, advanced labs, and the industry’s top-scale data security standards. That is why big names like Riot Games, Dena, and Lilith Games are attached to WeTest.

Wrapping Up:

Different types of selectors in CSS can be used to find elements in a document, as well as in a web page or web document. They are a powerful tool for targeting specific elements and the properties of those elements. They can be used to target an element with specific CSS rules, or they can be used to target each child of an element with different stylesheets. If you've ever tried to edit a style sheet and noticed that some of your rules were missing from it, this is because you're using CSS selectors.