Web Front-end
HTML Tutorial
How to achieve the sub-box centering vertically with the text position unchanged in CSS transparent parent box?
How to achieve the sub-box centering vertically with the text position unchanged in CSS transparent parent box?
Apr 05, 2025 am 09:15 AM
In CSS layout, how to achieve the parent box having transparency and containing text, while allowing the child box to be vertically centered within the parent box and keep the text position unchanged? This is a common CSS layout problem. This article will explain in detail how to solve this problem and provide specific CSS code examples.
The core of the problem lies in how to center the child box vertically without affecting the text content in the parent box when the parent box is set to transparency (opacity: 0.2). Using the opacity attribute directly causes the child elements to inherit transparency, which is contrary to our needs.
The key to the solution is to use absolute positioning and transform: translateY(-50%). First, we need to set the child element to absolute position (position: absolute), so that it is separated from the document stream and can be positioned according to the parent element. Then, set top: 50% to move the top of the child element to half the height of the parent element, and then use transform: translateY(-50%) to move the child element upwards by half of its height, thereby achieving vertical centering.
As for the transparency of the parent element, we should not use the opacity attribute because it affects the transparency of all child elements. Instead, the background color of the parent element should be set using the rgba() color value, such as background-color: rgba(255, 255, 255, 0.2); This will achieve the transparency of the parent element without affecting the transparency of the child element.
Therefore, the final CSS code should be similar to the following structure (the specific style needs to be adjusted according to the actual situation):
.parent {
position: relative; /* The parent element needs to be set to relative positioning*/
background-color: rgba(255, 255, 255, 0.2); /* Use rgba to set transparency*/
}
.child {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%); /* vertical and horizontal center*/
}
Through the above method, the vertical centering effect of the child box can be achieved while ensuring the transparency of the parent box and the text position remain unchanged. Remember, adjusting the left attribute can achieve horizontal centering, and transform: translate(-50%, -50%) can achieve horizontal and vertical centering at the same time.
The above is the detailed content of How to achieve the sub-box centering vertically with the text position unchanged in CSS transparent parent box?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
How to use PHP to build social sharing functions PHP sharing interface integration practice
Jul 25, 2025 pm 08:51 PM
The core method of building social sharing functions in PHP is to dynamically generate sharing links that meet the requirements of each platform. 1. First get the current page or specified URL and article information; 2. Use urlencode to encode the parameters; 3. Splice and generate sharing links according to the protocols of each platform; 4. Display links on the front end for users to click and share; 5. Dynamically generate OG tags on the page to optimize sharing content display; 6. Be sure to escape user input to prevent XSS attacks. This method does not require complex authentication, has low maintenance costs, and is suitable for most content sharing needs.
PHP creates a blog comment system to monetize PHP comment review and anti-brush strategy
Jul 25, 2025 pm 08:27 PM
1. Maximizing the commercial value of the comment system requires combining native advertising precise delivery, user paid value-added services (such as uploading pictures, top-up comments), influence incentive mechanism based on comment quality, and compliance anonymous data insight monetization; 2. The audit strategy should adopt a combination of pre-audit dynamic keyword filtering and user reporting mechanisms, supplemented by comment quality rating to achieve content hierarchical exposure; 3. Anti-brushing requires the construction of multi-layer defense: reCAPTCHAv3 sensorless verification, Honeypot honeypot field recognition robot, IP and timestamp frequency limit prevents watering, and content pattern recognition marks suspicious comments, and continuously iterate to deal with attacks.
What are common CSS browser inconsistencies?
Jul 26, 2025 am 07:04 AM
Different browsers have differences in CSS parsing, resulting in inconsistent display effects, mainly including the default style difference, box model calculation method, Flexbox and Grid layout support level, and inconsistent behavior of certain CSS attributes. 1. The default style processing is inconsistent. The solution is to use CSSReset or Normalize.css to unify the initial style; 2. The box model calculation method of the old version of IE is different. It is recommended to use box-sizing:border-box in a unified manner; 3. Flexbox and Grid perform differently in edge cases or in old versions. More tests and use Autoprefixer; 4. Some CSS attribute behaviors are inconsistent. CanIuse must be consulted and downgraded.
How to build a PHP Nginx environment with MacOS to configure the combination of Nginx and PHP services
Jul 25, 2025 pm 08:24 PM
The core role of Homebrew in the construction of Mac environment is to simplify software installation and management. 1. Homebrew automatically handles dependencies and encapsulates complex compilation and installation processes into simple commands; 2. Provides a unified software package ecosystem to ensure the standardization of software installation location and configuration; 3. Integrates service management functions, and can easily start and stop services through brewservices; 4. Convenient software upgrade and maintenance, and improves system security and functionality.
Describe the `vertical-align` property and its typical use cases
Jul 26, 2025 am 07:35 AM
Thevertical-alignpropertyinCSSalignsinlineortable-cellelementsvertically.1.Itadjustselementslikeimagesorforminputswithintextlinesusingvalueslikebaseline,middle,super,andsub.2.Intablecells,itcontrolscontentalignmentwithtop,middle,orbottomvalues,oftenu
What is the accent-color property?
Jul 26, 2025 am 09:25 AM
accent-color is an attribute used in CSS to customize the highlight colors of form elements such as checkboxes, radio buttons and sliders; 1. It directly changes the default color of the selected state of the form control, such as changing the blue check mark of the checkbox to red; 2. Supported elements include input boxes of type="checkbox", type="radio" and type="range"; 3. Using accent-color can avoid complex custom styles and extra DOM structures, and maintain native accessibility; 4. It is generally supported by modern browsers, and old browsers need to be downgraded; 5. Set accent-col
How to compile SCSS to CSS?
Jul 27, 2025 am 01:58 AM
InstallDartSassvianpmafterinstallingNode.jsusingnpminstall-gsass.2.CompileSCSStoCSSusingthecommandsassinput.scssoutput.css.3.Usesass--watchinput.scssoutput.csstoauto-compileonsave.4.Watchentirefolderswithsass--watchscss:css.5.Usepartialswith_prefixfo
How to change text color in CSS?
Jul 27, 2025 am 04:25 AM
To change the text color in CSS, you need to use the color attribute; 1. Use the color attribute to set the text foreground color, supporting color names (such as red), hexadecimal codes (such as #ff0000), RGB values (such as rgb(255,0,0)), HSL values (such as hsl(0,100%,50%)), and RGBA or HSLA with transparency (such as rgba(255,0,0,0.5)); 2. You can apply colors to any element containing text, such as h1 to h6 titles, paragraph p, link a (note the color settings of different states of a:link, a:visited, a:hover, a:active), buttons, div, span, etc.; 3. Most
