In-depth understanding of the usage of CSS attribute selectors

In-depth understanding of the attribute selector of CSS selector requires specific code examples

Introduction:
CSS selector is a commonly used technology in front-end development. Used to select HTML elements that meet specific conditions and add styles or effects to them. The attribute selector is one of the types. It selects elements through the value of the attribute, allowing us to locate the required element more accurately. This article will delve into the attribute selector of CSS selectors and provide specific code examples so that readers can better understand and apply this powerful selector.

1. Basic attribute selector:
1. Select elements with specified attributes:

p[title] {
    color: red;
}

In the above code, p[title] means selecting all elements with specified attributes. <p></p> element with title attribute and set the text color to red.

2. Select elements with specified attributes and attribute values:

a[href="https://www.example.com"] {
    text-decoration: none;
}

In the above code, a[href="https://www.example.com"]Indicates that selecting the <a></a> element with the href attribute value of https://www.example.com and setting its text decoration to none .

3. Select elements starting with the specified attribute value:

[class^="btn"] {
    background-color: orange;
}

In the above code, [class^="btn"] means selecting all classElements whose attribute value starts with btn and set the background color to orange.

2. Selectors containing specific attribute values:
1. Select elements ending with the specified attribute value:

[href$=".pdf"] {
    color: #0f0;
}

In the above code, [href$=". pdf"] means to select all elements whose href attribute value ends with .pdf and set the text color to green.

2. Select elements with specified attribute values:

[src*="logo"] {
    width: 100px;
    height: 100px;
}

In the above code, [src*="logo"] means selecting all srcElements containing logo in their attribute values, and set their width and height to 100 pixels.

3. Select elements with empty attribute values:

[disabled] {
    opacity: 0.5;
}

In the above code, [disabled] means selecting elements with empty disabled attribute values element and set the transparency to 0.5.

4. Select elements with specified attribute values ​​or elements starting with specific attribute values:

[href="https://www.example.com"], [href^="https://"] {
    color: blue;
}

In the above code, [href="https://www.example. com"], [href^="https://"] means selecting elements with the href attribute value of https://www.example.com, and Elements that have an href attribute value starting with https:// and set the text color to blue.

Summary:
The attribute selector of the CSS selector is a powerful tool that can help us select and position HTML elements more accurately. This article introduces four common attribute selectors: basic attribute selectors, selectors containing specific attribute values, selecting elements with empty attribute values, and selecting elements with specified attribute values ​​or elements starting with a specific attribute value, and provides Corresponding code examples are provided. I hope this article can help readers have an in-depth understanding and flexible application of CSS selector attribute selectors, and improve the efficiency and quality of front-end development.

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