how to write css

CSS (Cascading Style Sheets) is an integral part of web design, which determines the style and layout of web pages. This article will teach you how to write good CSS.

Step one: Choose the appropriate selector

The selector is the most basic element in CSS, which is used to select the HTML element to be acted upon. There are many types of selectors and we need to choose the appropriate selector.

ID selector (#): used to select a unique HTML element, such as

.

Class selector (.): used to select HTML elements with the same category, such as

.

Tag selector: used to select specific HTML elements, such as

.

Descendant selector: used to select elements within a certain element, such as the p element in

.

Pseudo-class selector: used to select HTML elements in a specific state, such as: hover.

Step 2: Set the style

Setting the style in the selector is the core of CSS. When designing styles, we need to select different attributes according to design requirements and set corresponding values.

Common CSS properties include:

color: Set the text color.

background-color: Set the background color.

font-size: Set the font size.

font-weight: Set the font weight.

text-align: Set text alignment.

margin: Set the margin of the element.

padding: Set the padding of the element.

border: Set the border of the element.

Step Three: Style Optimization

Optimizing styles can make web pages more beautiful and improve user experience. Here are some optimization tips:

Use font icons: Font icons can be set in color and size through CSS and will not affect web page loading speed.

Reduce pictures: Use tools to compress pictures to the smallest possible size without distortion.

Merge files: Merge CSS files and JavaScript files into one file to reduce web page loading time.

Use CSS framework: Using CSS framework can simplify style design.

Step 4: Compatibility and Responsive Design

When designing CSS, we need to consider the differences between different browsers. In order to ensure that web pages can be displayed normally in different browsers, we need to conduct compatibility testing and use different CSS codes for different browsers.

Responsive design is an adaptive web design based on different resolutions and device sizes. We can use CSS media queries to achieve responsive design. For example:

@media screen and (max-width: 600px) {
body {

background-color: yellow;

}
}

This CSS code will be on the screen Set the background color of the web page to yellow when the resolution is less than 600 pixels.

Summary

CSS is an indispensable part of web design. We need to choose appropriate selectors, set styles, optimize styles, consider compatibility and responsive design to write CSS well. . These techniques can help us design more beautiful and easier-to-use web pages.

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