What is the z-index attribute of CSS used for:
In web page production, there may be a need to overlap several layers. Together, and the order can be specified, using the z-index attribute is a good choice at this time.
However, this attribute only acts on objects whose position attribute value is relative, absolute, or fixed, and will not act on window controls, such as select objects.
The example code is as follows:
<!DOCTYPE html><html><head><meta charset=" utf-8"><meta name="author" content="http://www.51texiao.cn/" /><title>蚂蚁部落</title><style type="text/css">.index1, .index2, .index3{ position:absolute; width:150px; height:100px;}.index1{ z-index:1; background-color:#663}.index2{ z-index:2; top:50px; left:50px; background-color:#303}.index3{ z-index:3; top:100px; left:100px; background-color:#090}</style></head><body><div class="index1">index1</div><div class="index2">index2</div><div class="index3">index3</div></body></html> Combined with the performance of the above code, the following conclusions can be drawn:
1. The value of the position attribute of the object must be relative, absolute or fixed.
2. Objects with a large z-index attribute value are located above objects with a small z-index attribute value.
The original address is: http://www.51texiao.cn/div_cssjiaocheng/2015/0519/1895.html
The most original address is: http://www.softwhy.com/ forum.php?mod=viewthread&tid=4702
Explain the importance of using consistent coding style for HTML tags and attributes.May 01, 2025 am 12:01 AMA consistent HTML encoding style is important because it improves the readability, maintainability and efficiency of the code. 1) Use lowercase tags and attributes, 2) Keep consistent indentation, 3) Select and stick to single or double quotes, 4) Avoid mixing different styles in projects, 5) Use automation tools such as Prettier or ESLint to ensure consistency in styles.
How to implement multi-project carousel in Bootstrap 4?Apr 30, 2025 pm 03:24 PMSolution to implement multi-project carousel in Bootstrap4 Implementing multi-project carousel in Bootstrap4 is not an easy task. Although Bootstrap...
How does deepseek official website achieve the effect of penetrating mouse scroll event?Apr 30, 2025 pm 03:21 PMHow to achieve the effect of mouse scrolling event penetration? When we browse the web, we often encounter some special interaction designs. For example, on deepseek official website, �...
How to modify the playback control style of HTML videoApr 30, 2025 pm 03:18 PMThe default playback control style of HTML video cannot be modified directly through CSS. 1. Create custom controls using JavaScript. 2. Beautify these controls through CSS. 3. Consider compatibility, user experience and performance, using libraries such as Video.js or Plyr can simplify the process.
What problems will be caused by using native select on your phone?Apr 30, 2025 pm 03:15 PMPotential problems with using native select on mobile phones When developing mobile applications, we often encounter the need for selecting boxes. Normally, developers...
What are the disadvantages of using native select on your phone?Apr 30, 2025 pm 03:12 PMWhat are the disadvantages of using native select on your phone? When developing applications on mobile devices, it is very important to choose the right UI components. Many developers...
How to optimize collision handling of third-person roaming in a room using Three.js and Octree?Apr 30, 2025 pm 03:09 PMUse Three.js and Octree to optimize collision handling of third-person roaming in the room. Use Octree in Three.js to implement third-person roaming in the room and add collisions...
What problems will you encounter when using native select on your phone?Apr 30, 2025 pm 03:06 PMIssues with native select on mobile phones When developing applications on mobile devices, we often encounter scenarios where users need to make choices. Although native sel...
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Zend Studio 13.0.1
Powerful PHP integrated development environment
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
SublimeText3 English version
Recommended: Win version, supports code prompts!
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
