css settings tag

CSS is a language used to describe the style expression of documents, which can add a lot of color to our web pages. In HTML, tags are used to describe the structure of text. So how to add styles to these tags through CSS? This article will take you through how to set label styles through CSS.

1. Syntax

In CSS, select tags through selectors and set styles for them. There are many types of selectors, such as tag selectors, class selectors, id selectors, etc. The following is some common syntax:

1. Tag selector

The tag selector is used to set styles for the corresponding type of tags. For example:

p {
    color: red;
}

The above code means setting the font color to red for all <p></p> tags.

2. Class selector

The class selector is used to set styles for all tags of a certain class on the page. For example:

.intro {
    font-size: 20px;
}

The above code means setting the font size to 20 pixels for all labels containing class "intro".

3. id selector

The id selector is used to style the label of a certain id on the page. For example:

#header {
    background-color: yellow;
}

The above code sets the background color to yellow for the label with the id "header".

2. Selector priority

In CSS, if an element is selected by multiple selectors, multiple style rules will act on it. At this time, you need to use the concept of selector priority.

Selector priority is generally calculated in the following order:

1. !important declaration
2. Inline style (for example: <p style="color : red;"></p>）
3. id selector
4. Class selector, attribute selector, pseudo-class selector
5. Label selector, pseudo-element selection

Among them, the !important declaration has the highest priority and will be overridden even if it has the same priority as the subsequent style rules.

3. Commonly used style attributes

Next, we will introduce some commonly used style attributes to help you better set styles for labels. The

#color property is used to set the color of the label text. For example:

p {
    color: red;
}

The above code means setting the font color to red for all <p></p> tags. The

2. font-size

font-size property is used to set the font size of the label text. For example:

p {
    font-size: 18px;
}

The above code means setting the font size to 18 pixels for all <p></p> tags.

3. background-color

background-color attribute is used to set the label background color. For example:

#header {
    background-color: yellow;
}

The above code sets the background color to yellow for the label with the id "header".

4. text-align

text-align attribute is used to set the label text alignment. For example:

h1 {
    text-align: center;
}

The above code means setting the text alignment to center for all <h1></h1> tags.

5. padding

padding property is used to set the label padding size. For example:

.container {
    padding: 20px;
}

The above code means that the inner margin is set to 20 pixels for the label with class "container".

4. Summary

This article introduces the syntax, selector priority and common style attributes of setting label styles in CSS. By integrating this knowledge, you can easily add personalized styles to the tags in your web pages, making your web pages more beautiful and personalized.

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