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What are the types of css style sheets that automatically take effect?

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Apr 25, 2024 pm 05:54 PM

cssattribute selector

There are five ways for CSS style sheets to automatically take effect: 1. Direct inline styles; 2. Internal style sheets; 3. External style sheets; 4. Attribute selectors; 5. JavaScript.

What are the types of css style sheets that automatically take effect?

Several ways for CSS style sheets to automatically take effect

There are several ways for CSS style sheets to automatically take effect:

1. Direct inline style

Inline style is written directly in the <style></style> tag of the HTML element. It is only effective for the element that contains it and takes precedence over other styles.

<p style="color: red; font-size: 20px;">一些文本</p>

2. Internal style sheet

The internal style sheet is written in the <style># inside the </style>

tag. ## tag. It is effective for the entire page and takes precedence over external style sheets.

<head>
  <style>
    p {
      color: blue;
      font-size: 16px;
    }
  </style>
</head>

3. External style sheet

The external style sheet is an independent file, and its file name has the extension

.css. Link it to the HTML page via the tag. Has lower priority than internal style sheets.

<head>
  <link rel="stylesheet" href="style.css">
</head>

4. Attribute selector

Attribute selector matches elements with specific attributes. When an element has this attribute, the style will automatically take effect. For example, the following style will apply red text to all elements with

class="important":

[class="important"] {
  color: red;
}

5. JavaScript

Using JavaScript CSS styles can be applied dynamically. For example, the following code will add a

class to the element, making its text red:

document.getElementById("myElement").classList.add("important");

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