Implement various application scenarios of CSS :nth-last-child pseudo-class selector

To implement various application scenarios of CSS :nth-last-child pseudo-class selector, specific code examples are required

In CSS, there are many pseudo-class selectors Can help us select and style HTML elements more accurately. Among them, the :nth-last-child pseudo-class selector is a very powerful and practical selector, which can select specific elements based on their position in the parent element. In this article, we will explore: various application scenarios of the nth-last-child pseudo-class selector and provide specific code examples.

1. Select the last child element

Use:nth-last-child(1) to select the last child element in the parent element. Here is an example:

HTML code:

<div class="parent">
  <div>第一个元素</div>
  <div>第二个元素</div>
  <div>第三个元素</div>
  <div>第四个元素</div>
</div>

CSS code:

.parent div:nth-last-child(1) {
  color: red;
}

In the above code, use the :nth-last-child(1) selector to select The last child element within the parent element and sets its color to red.

2. Select the penultimate child element

Use:nth-last-child(2) to select the penultimate child element in the parent element. Here is an example:

HTML code:

<div class="parent">
  <div>第一个元素</div>
  <div>第二个元素</div>
  <div>第三个元素</div>
  <div>第四个元素</div>
</div>

CSS code:

.parent div:nth-last-child(2) {
  color: blue;
}

In the above code, use the :nth-last-child(2) selector to select The penultimate child element within the parent element and set its color to blue.

3. Select the third to last child element

Use:nth-last-child(n 3):nth-last-child(-n 1) You can select the third to last child element in the parent element. Here is an example:

HTML code:

<div class="parent">
  <div>第一个元素</div>
  <div>第二个元素</div>
  <div>第三个元素</div>
  <div>第四个元素</div>
  <div>第五个元素</div>
</div>

CSS code:

.parent div:nth-last-child(n+3):nth-last-child(-n+1) {
  color: orange;
}

In the above code, use:nth-last-child(n 3):nth The -last-child(-n 1) selector selects the third to last child element in the parent element and sets its color to orange.

4. Select child elements at odd positions

With the help of the :nth-last-child(odd) selector, we can select child elements at odd positions. Here is an example:

HTML code:

<div class="parent">
  <div>第一个元素</div>
  <div>第二个元素</div>
  <div>第三个元素</div>
  <div>第四个元素</div>
  <div>第五个元素</div>
</div>

CSS code:

.parent div:nth-last-child(odd) {
  background-color: lightgray;
}

In the above code, use the :nth-last-child(odd) selector to select Child elements at odd positions within the parent element and set their background color to light gray.

Through this article, we learned how to use the :nth-last-child pseudo-class selector to implement various application scenarios. This pseudo-class selector is very useful in actual development and is very practical when dealing with some specific layout and style requirements. Through the combination of different parameters, we can select different positions of the target element and achieve more complex styling effects.

I hope this article can help you better understand and learn the :nth-last-child pseudo-class selector in CSS, as well as its various application scenarios. Wishing you better results with CSS styling!

The above is the detailed content of Implement various application scenarios of CSS :nth-last-child pseudo-class selector. For more information, please follow other related articles on the PHP Chinese website!