In web design, it is very important for developers to write short and precise code that is easy to run. Lengthy code is always bad for developers as it increases the loading time of the web page, thereby reducing the readability of the website. Additionally, it becomes difficult for developers to debug the code.
CSS provides nesting and grouping capabilities, enabling developers to write precise code. It helps keep your code specific and readable. Furthermore, since the length of the code is reduced, the running time and loading time of the page will also be reduced, thus attracting the user's attention. This increases the readability of your website. In this article, we will discuss the concepts of nesting and grouping in CSS.
The nesting property in CSS enables the developers to nest one specific style rule within another, with the child rule's selector relative to the parent rule's selector.
class1_selector class2_selector id_selector{
CSS declarations;
}
<!DOCTYPE html>
<html>
<head>
<title>Nesting in CSS</title>
<style>
*{
text-align: center;
}
h1{
color: #00FF00;
text-decoration: underline;
}
p span{
color: blue;
font-size: 18px;
letter-spacing: 1px;
font-weight: bold;
font-family: cursive;
}
</style>
</head>
<body>
<h1>Tutorialspoint</h1>
<h2>Computer Programming</h2>
<p>The process of carrying out a given computation (or, more broadly, achieving a specified computing result) through the design and construction of an executable computer programme is known as computer programming. Analysis, algorithm generation, resource use profiling, and algorithm implementation are some of the duties involved in programming (usually in a chosen programming language, commonly referred to as coding). <span> Instead of being written in machine code, which is immediately executed by the CPU, a programme is written in one or more languages that are understandable to programmers. </span> Finding a set of instructions that will automate the completion of a task—which may be as complicated as an operating system—on a computer is the goal of programming, which is frequently done to address a specific issue.</p>
</body>
</html>
The following are the main advantages of nesting:
Nesting helps in creating more modular and maintainable stylesheets. Rather than having the same selector in multiple places in a stylesheet, you can group all styles related to that selector in one place. This will drastically reduce development and debugging time . For instance, if you design an organized CSS module, you may simply give attributes to selections within other selects rather of giving distinct selectors for each HTML element, such as by utilizing various classes or ID selectors.
It enables the nesting of media queries. Nesting eliminates the requirement for a distinct media query rule for each selection. This can be added immediately where the selector was declared.
When CSS properties are nested in HTML components, a tree shape is produced. Use the nested approach to quickly create large numbers of CSS rules that select a single property. So instead of duplicating the same set of properties for each selector, we can simply stack selectors inside other selectors. As a result, we've seen a reduction in code count and load times.
To select and style multiple elements at the same time, you can use CSS group selectors. Doing so reduces the amount of code and effort required to create standard styles for each element. To group them, use a space between each selector.
selector1, selector2, selector3…...selectorN {
CSS declarations;
}
<!DOCTYPE html>
<html>
<head>
<title> Grouping in CSS </title>
<style>
*{
text-align: center;
}
h1{
color: #00FF00;
text-decoration: underline;
}
h2{
color: red;
}
h1, h2{
font-family: Times New Roman, sans-serif;
letter-spacing: 1px;
font-weight: 900;
}
h2, p{
margin: 5px;
padding: 10px 5px 10px 10px;
}
</style>
</head>
<body>
<h1>Tutorialspoint</h1>
<h2>Computer Programming</h2>
<p>The process of carrying out a given computation (or, more broadly, achieving a specified computing result) through the design and construction of an executable computer programme is known as computer programming. Analysis, algorithm generation, resource use profiling, and algorithm implementation are some of the duties involved in programming (usually in a chosen programming language, commonly referred to as coding). Instead of being written in machine code, which is immediately executed by the CPU, a programme is written in one or more languages that are understandable to programmers. Finding a set of instructions that will automate the completion of a task—which may be as complicated as an operating system—on a computer is the goal of programming, which is frequently done to address a specific issue. </p>
</body>
</html>
Following are the advantages of grouping in CSS –
It helps shorten code that contains many selectors with the same characteristics. This makes the code more readable. When using grouping, page load time and code development time are reduced.
If there is an error in the code, you can easily make changes in one selector and it will be applied to all the selectors grouped together.
Nesting |
Group |
|---|---|
Using the nesting feature, you can nest one style rule within another style rule, where the selector of the child rule is related to the selector of the parent rule. |
Through the grouping function, you can assign the same attributes and values to multiple selectors at one time. |
Nesting is a technique for managing and simplifying a large number of project properties, but it can become cumbersome if multiple elements are nested with the same value. Nested functionality like this can be difficult to control. |
Applying these features to multiple different components simultaneously is straightforward and manageable using grouping. |
If we need to edit the properties of a specific element in CSS, such as a parent element or a child element, in the case of nesting, we must edit it manually for that element. |
For grouping, we only need to modify the style of one selector and it will be applied to other selectors grouped together. |
While you can always list CSS styles individually, remember that grouping styles together saves space and separates selectors. By grouping, you can stay organized. Nesting will help with modularity and maintenance of stylesheets. This is due to nesting, which allows all selector-related styles, child/parent selectors and even media queries to be nested in the same location.
The above is the detailed content of Nesting and grouping in CSS explained. For more information, please follow other related articles on the PHP Chinese website!
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
