An in-depth discussion of the reasons why CSS does not inherit styles and solutions

With the rapid development of Internet technology, website design and development are becoming more and more important. In the design of a website, the use of CSS styles is a crucial part. It can give the website a beautiful appearance and improve the user experience. It is also one of the indispensable tools for achieving interactive effects on web pages. In CSS styles, inherited styles can greatly reduce the amount of code in CSS styles, thereby simplifying the workload of reducing CSS files and improving code readability. However, in the actual CSS style design process, we sometimes encounter situations where CSS does not inherit styles, which brings some inconvenience and trouble to website development. This article will discuss in depth the reasons why CSS does not inherit styles and how to solve them.

1. Reasons why CSS does not inherit styles

In CSS style design, we can use parent element styles to pass to child elements, which is the so-called inherited style. However, not all styles can be inherited by child elements. Some non-inherited style standards are designed to meet the needs of website layout, while some non-inherited styles are restricted due to considerations such as readability, maintainability, and code security.

1. Form element style

The form element style is a typical style that is not inherited in CSS. Form elements include text boxes, buttons, password boxes, drop-down list boxes, etc. Usually their styles need to be defined separately to achieve a unified style. For example, if an input element has color and font styles set, then it will not inherit these styles if it is nested after a div element. This is because the style, width, height, form events, etc. of form elements may need to be different from other elements, thereby making form elements such as input boxes more operable and providing users with a better experience.

2.display:none style

display:none does not support inheritance in CSS style design. If an element uses the display:none attribute, it means that this element will not be displayed on the web page and will not have any impact on child elements. Therefore, it only works for the current element. If you want child elements to inherit the display:none attribute, you need to define a separate style for the child elements to achieve this. This approach can enhance the readability of the code.

3.position attribute

The position attribute is a positioning attribute in CSS that is used to specify the positioning method (for example, relative, absolute) and position of the element. When an element uses the position attribute, its child elements do not inherit its position attribute setting. This is because these child elements may be positioned relative to different elements. Therefore, they require individually set positioning properties to modify their position. This approach can enhance the maintainability of the code.

2. Methods to solve the problem that CSS does not inherit styles

Although there are some restrictions in CSS that do not support style inheritance, we can take some methods to solve the inconvenience caused by these constraints.

1. Use CSS selectors

Using CSS selectors is one of the most common methods to solve the problem that CSS does not inherit styles. Through CSS selectors, we can directly select the required elements and apply styles to them. Compared with CSS inherited styles, this method is more flexible and operable, and the code is also simpler.

For example, if we want to set an input element to have the same style as a nested div element, we can use the following css code:

input,div{
    color:red;
    font-size:15px;
}

2. Use global variables

In CSS style design, we can also use global variables to manage styles uniformly, thereby avoiding the problem of repeatedly defining styles. Global variables can provide unified definitions for some independent values ​​​​in CSS styles (such as color, font size, etc.), which facilitates the management of style files. In addition, global variables can also be referenced in the style of a specific element, making the style more concise and easy to modify. This approach helps simplify CSS code and improves code readability.

The following is a sample code for global variables:

:root {
  --main-color: #123456;
}
 
.your-class {
  color: var(--main-color);
}

3. Use style inheritance

In CSS, there are also some styles that can be inherited. These styles include text-related styles (such as font, color, size, line height, etc.) and list-related styles (such as internal list item characters, external list item size, style, etc.). If we need to let an element inherit some styles of its parent element, we can use the following code:

.parent-class {
  color:red;
}
 
.child-class {
  color:inherit;
}

inherit as one of the CSS keywords in the text is used to indicate that the current element inherits its parent The style of the element.

Summary: CSS does not inherit styles is the basis of CSS style design. It is very important for developers to understand this. Although CSS does not inherit styles, it may cause some troubles in code writing and management, but with some easy-to-implement solutions, we can easily solve these problems. In the actual development process, we need to make choices based on our own needs so that we can better achieve the design goals of the website.

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