


How to create a full screen background image using CSS Viewport units vh and vw
Sep 13, 2023 am 10:57 AMHow to create a full-screen background image using CSS Viewport units vh and vw, specific code examples are required
With the popularity of mobile devices and responsive design, full-screen background images has become a common element in design. The traditional way is to use JavaScript or jQuery to achieve this, but now you can easily implement a full-screen background image by leveraging the CSS Viewport units vh and vw. Viewport units are relative to the size of the viewport (that is, the browser window), vh represents a percentage of the viewport height, and vw represents a percentage of the viewport width.
In the following example, we show how to use CSS Viewport units to create a full-screen background image. First, we are going to create an HTML file and add the following code in it:
<!DOCTYPE html> <html> <head> <style> .fullscreen-bg { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; overflow: hidden; z-index: -1; } .fullscreen-bg img { width: 100%; height: 100%; object-fit: cover; } </style> </head> <body> <div class="fullscreen-bg"> <img src="background-image.jpg" alt="Background Image"> </div> </body> </html>
In the above example, we created a class named fullscreen-bg
< ;div>
element, which will fill the entire viewport. We inserted an <img>
element inside to display the background image. We then use CSS to style these elements.
First, we set the position
property of .fullscreen-bg
to fixed
so that it can always remain in the browser viewport the top and left side. Then, we position it at the top left corner of the page via top: 0
and left: 0
. Next, we set its width and height to a percentage of the viewport using width: 100vw
and height: 100vh
so that it fills the entire viewport. We then hide its overflow content using overflow: hidden
and place it below other content using z-index: -1
.
Next, we set the width and height of .fullscreen-bg img
to 100% and use object-fit: cover
to fill the entire <img>
A container for elements that ensures that the image scales proportionally on any device and is fully displayed in the viewport.
Finally, we set the path to the sample image to background-image.jpg
, which you can replace with the path to the background image you want.
With the above sample code, you can easily use CSS Viewport units vh and vw to create a full-screen background image. Remember to replace the image's path with your own background image to adapt it to your design needs. Hope this article helps you!
The above is the detailed content of How to create a full screen background image using CSS Viewport units vh and vw. 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)

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.

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.

Thevertical-alignpropertyinCSSalignsinlineortable-cellelementsvertically.1.Itadjustselementslikeimagesorforminputswithintextlinesusingvalueslikebaseline,middle,super,andsub.2.Intablecells,itcontrolscontentalignmentwithtop,middle,orbottomvalues,oftenu

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

InstallDartSassvianpmafterinstallingNode.jsusingnpminstall-gsass.2.CompileSCSStoCSSusingthecommandsassinput.scssoutput.css.3.Usesass--watchinput.scssoutput.csstoauto-compileonsave.4.Watchentirefolderswithsass--watchscss:css.5.Usepartialswith_prefixfo

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

UseautomatedtoolslikePurgeCSSorUnCSStoscanandremoveunusedCSS;2.IntegratepurgingintoyourbuildprocessviaWebpack,Vite,orTailwind’scontentconfiguration;3.AuditCSSusagewithChromeDevToolsCoveragetabbeforepurgingtoavoidremovingneededstyles;4.Safelistdynamic

CSStransitionsenablesmoothpropertychangeswithminimalcode,idealforhovereffectsandinteractivefeedback.1.Usethesyntaxtransition:propertydurationtiming-functiondelay;todefinetransitions,liketransition:background-color0.3sease0.1s;.2.Specifytransition-pro
