Master the application skills of CSS attribute selectors

To learn how to use CSS attribute selectors, specific code examples are required

With the rapid development of the Internet, web design and development has become a popular industry. As one of the basic technologies of web development, CSS (Cascading Style Sheets) plays an important role in web design. The CSS attribute selector is a powerful and commonly used selector in CSS. It can select elements for style setting based on their attribute values. This article will introduce how to use CSS attribute selectors and provide specific code examples.

CSS attribute selectors allow us to select elements based on their attribute values. It has the following common forms:

1. Attribute selector ([attribute]): Selects elements with specified attributes. For example, you can use [attr] to select all elements with the attr attribute.
2. Attribute selector with equal sign ([attribute=value]): Select elements that have the specified attribute and the value is equal to value. For example, you can use [attr=value] to select elements whose attr attribute value is value.
3. Prefix matching attribute selector ([attribute^=value]): selects elements that have the specified attribute and whose value starts with value. For example, you can use [attr^=value] to select elements whose attr attribute value starts with value.
4. Suffix matching attribute selector ([attribute$=value]): selects elements that have the specified attribute and whose value ends with value. For example, you can use [attr$=value] to select elements whose attr attribute value ends with value.
5. Contains matching attribute selectors ([attribute=value]): Selects elements that have the specified attribute and whose value contains value. For example, you can use [attr=value] to select elements whose attr attribute value contains value.

The following are several specific examples to demonstrate the use of CSS attribute selectors:

1. Select all elements with the title attribute and set their color to red :

[title] {
  color: red;
}

2. Select all elements that have a class attribute with a value of "example" and set their background color to yellow:

[class=example] {
  background-color: yellow;
}

3. Select all elements that have a href attribute and a value starting with "http://" and set their text color to blue:

[href^="http://"] {
  color: blue;
}

4. Select all elements that have a src attribute and a value starting with " .jpg" and set their borders to 1px red:

[src$=".jpg"] {
  border: 1px solid red;
}

5. Select all elements that have an alt attribute and contain "logo" in their value, and set their font size For 20px:

[alt*="logo"] {
  font-size: 20px;
}

The above example shows the basic usage of CSS attribute selectors, but in fact its function is much more than that. By flexibly using CSS attribute selectors, we can select elements more accurately to achieve the desired style effect.

To summarize, the CSS attribute selector is one of the commonly used selectors in CSS. It can select elements for style setting based on their attribute values. We can use different attribute selector forms to select elements according to our needs, and set styles for these elements to achieve specific effects. In order to better master the use of CSS attribute selectors, we can practice more in actual projects and consult relevant information to improve our web design and development capabilities.

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