How to set transparency gradient for css background image
In css, you can use the linear-gradient() and rgba() functions to achieve the transparency gradient of the image. The syntax is "background-image:linear-gradient(to top,rgba(..), rgba(..) )),url(..)".
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
css background image setting transparency gradient
In css, you can use the linear-gradient() and rgba() functions to achieve the transparency gradient of the image
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>图片透明度渐变实例演示</title>
<style>
.div1 {
box-sizing: border-box;
width: 400px;
height: 240px;
font-size: 22px;
padding-top: 100px;
overflow: hidden;
background: no-repeat center top / 100% 100%;
background-image: url(img/3.jpg)
}
.div2 {
box-sizing: border-box;
width: 400px;
height: 240px;
font-size: 22px;
padding-top: 100px;
overflow: hidden;
background: no-repeat center top / 100% 100%;
background-image: linear-gradient(to top, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0)), url(img/3.jpg)
}
</style>
</head>
<body>
<p>原图：</p>
<div class="div1"></div>
<p>透明度渐变：</p>
<div class="div2"></div>
</body>
</html>Rendering:
(Learning video sharing: css video tutorial)
Instructions:
The linear-gradient() function is used to create an "image" of a linear gradient.
To create a linear gradient, you need to set a starting point and a direction (specified as an angle) of the gradient effect. You also need to define the end color. The stop color is the smooth transition you want Gecko to make, and you must specify at least two, although you can specify more colors to create more complex gradient effects.
css syntax:
background: linear-gradient(direction, color-stop1, color-stop2, ...);
direction Use the angle value to specify the direction (or angle) of the gradient.
color-stop1, color-stop2,... Used to specify the starting and ending colors of the gradient.
#Use rgba in the linear-gradient() function to set the transparency gradient.
RGBA means (Red-Green-Blue-Alpha) It is an extension of RGB to include the "alpha" channel, which sets transparency to the color value.
Syntax:
rgba(red, green, blue, alpha)
red Define the red value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%.
green Define the green value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%.
blue Define the blue value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%.
alpha - Transparency Define transparency 0 (completely transparent) ~ 1 (completely opaque)
For more programming-related knowledge, please visit: Introduction to Programming! !
The above is the detailed content of How to set transparency gradient for css background image. For more information, please follow other related articles on the PHP Chinese website!
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
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)
Hot Topics
1386
52
How to use bootstrap in vue
Apr 07, 2025 pm 11:33 PM
Using Bootstrap in Vue.js is divided into five steps: Install Bootstrap. Import Bootstrap in main.js. Use the Bootstrap component directly in the template. Optional: Custom style. Optional: Use plug-ins.
The Roles of HTML, CSS, and JavaScript: Core Responsibilities
Apr 08, 2025 pm 07:05 PM
HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.
How to write split lines on bootstrap
Apr 07, 2025 pm 03:12 PM
There are two ways to create a Bootstrap split line: using the tag, which creates a horizontal split line. Use the CSS border property to create custom style split lines.
Understanding HTML, CSS, and JavaScript: A Beginner's Guide
Apr 12, 2025 am 12:02 AM
WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
How to set up the framework for bootstrap
Apr 07, 2025 pm 03:27 PM
To set up the Bootstrap framework, you need to follow these steps: 1. Reference the Bootstrap file via CDN; 2. Download and host the file on your own server; 3. Include the Bootstrap file in HTML; 4. Compile Sass/Less as needed; 5. Import a custom file (optional). Once setup is complete, you can use Bootstrap's grid systems, components, and styles to create responsive websites and applications.
How to insert pictures on bootstrap
Apr 07, 2025 pm 03:30 PM
There are several ways to insert images in Bootstrap: insert images directly, using the HTML img tag. With the Bootstrap image component, you can provide responsive images and more styles. Set the image size, use the img-fluid class to make the image adaptable. Set the border, using the img-bordered class. Set the rounded corners and use the img-rounded class. Set the shadow, use the shadow class. Resize and position the image, using CSS style. Using the background image, use the background-image CSS property.
How to resize bootstrap
Apr 07, 2025 pm 03:18 PM
To adjust the size of elements in Bootstrap, you can use the dimension class, which includes: adjusting width: .col-, .w-, .mw-adjust height: .h-, .min-h-, .max-h-
How to use bootstrap button
Apr 07, 2025 pm 03:09 PM
How to use the Bootstrap button? Introduce Bootstrap CSS to create button elements and add Bootstrap button class to add button text
