search
HomeWeb Front-endCSS TutorialExplanation of background:transparent in css

Explanation of background:transparent in css

Jun 12, 2018 am 11:20 AM
background

This article mainly introduces the explanation about background:transparent in css. It has certain reference value. Now I share it with you. Friends in need can refer to

What is transparent in css? What does it mean? I have always thought it was strange. What is it used for? This article will explain it in detail. Friends who need it can refer to it

Sometimes when I look at css, I see that some css attributes are defined as background:transparent . It means the background is transparent. In fact, the default color of the background is the transparent attribute. So it’s the same whether you write or not.
I haven’t written an article for a while. I have been in school. Although I have a computer with me, I can’t access the Internet! Recently I am using JavaScript to write a web version of the operating system. Once it is written, it will definitely Posting this, I encountered many problems during the writing process. Many of them are details and very troublesome. However, I have been working hard to solve them. It is also a kind of improvement for myself. Now let me talk about a problem I encountered recently. .
As everyone knows, you use createelement to create a new p. By default, the backgroundcolor attribute in the style of this p is transparent. Haha, if I make a mask of p, then please see the following code:

p.style.position="absolute"; 
p.style.width=document.body.clientWidth+"px"; 
p.style.height=document.body.clientHeight+"px"; 
p.style.left="0px"; 
p.style.top="0px"; 
p.style.zIndex="2000"; 
p.style.backgroundColor="black"; 
p.style.filter="alpha(opacity="+0+");";

This is a lot of settings for mask p, which means that users are shielded from operating other elements on the web page.
We mainly look at the last two lines of code. As I said before, the default of p The backgroundcolor attribute is transparent, that is, transparent, so why do we need to go to the trouble of setting a black (it doesn't matter, just set a color as long as it is not transparent, and it cannot be an empty string. The browser will default to an empty string See it as transparent), and set the filter to make it transparent.
I did the experiment myself. I was confused about the test results at first, but when I calmed down and thought about it, I discovered the difference. If we didn’t have the above In the last two sentences of the code, we can operate on the masked elements, which means that it will not have a shielding effect, but this operation is limited. Specifically, we can only operate on the focused elements. , such as text, pictures, buttons, etc., let me give you an example:

<p>123</p>

Under normal circumstances, as long as you click anywhere on this p, it will alert, but when it is covered by an element with a background color of transparent When we click 123, the alert will occur, because the text can gain focus, and the same goes for other elements. By the way, the event of the element whose background color is transparent will be intercepted by the element covered by it. If The object we trigger does not have focus, then the event will be exchanged to the transparent element for processing and bubbled according to this element. Otherwise, the event with focus will be processed by the object with focus, without exchange, and according to the element with focus. Perform bubbling. (It doesn’t seem to be very easy to understand. You can understand it by doing more experiments.)
Let’s put it this way, everyone understands. This is why the last two sentences are needed. Only in this way can we perform bubbling on web page elements. Completely shielded.
Set the style to transparent color
Sometimes, if the above text says

background:inherit;

, then the following text may need to clear the background, so it writes

background:transparent;

with a transparent background. Just remove the
If an element covers another element, and you want to display the following element, then you need to set the background of the above element to transparent
There is something wrong with this article. Please correct me. The content of this article was tested under IE7.0.

The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

Four states in the css style of a tag

CSS Introduction to the use of Border attribute solid

The above is the detailed content of Explanation of background:transparent in css. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
The Lost CSS Tricks of Cohost.orgThe Lost CSS Tricks of Cohost.orgApr 25, 2025 am 09:51 AM

In this post, Blackle Mori shows you a few of the hacks found while trying to push the limits of Cohost’s HTML support. Use these if you dare, lest you too get labelled a CSS criminal.

Next Level CSS Styling for CursorsNext Level CSS Styling for CursorsApr 23, 2025 am 11:04 AM

Custom cursors with CSS are great, but we can take things to the next level with JavaScript. Using JavaScript, we can transition between cursor states, place dynamic text within the cursor, apply complex animations, and apply filters.

Worlds Collide: Keyframe Collision Detection Using Style QueriesWorlds Collide: Keyframe Collision Detection Using Style QueriesApr 23, 2025 am 10:42 AM

Interactive CSS animations with elements ricocheting off each other seem more plausible in 2025. While it’s unnecessary to implement Pong in CSS, the increasing flexibility and power of CSS reinforce Lee's suspicion that one day it will be a

Using CSS backdrop-filter for UI EffectsUsing CSS backdrop-filter for UI EffectsApr 23, 2025 am 10:20 AM

Tips and tricks on utilizing the CSS backdrop-filter property to style user interfaces. You’ll learn how to layer backdrop filters among multiple elements, and integrate them with other CSS graphical effects to create elaborate designs.

SMIL on?SMIL on?Apr 23, 2025 am 09:57 AM

Well, it turns out that SVG's built-in animation features were never deprecated as planned. Sure, CSS and JavaScript are more than capable of carrying the load, but it's good to know that SMIL is not dead in the water as previously

'Pretty' is in the eye of the beholder'Pretty' is in the eye of the beholderApr 23, 2025 am 09:40 AM

Yay, let's jump for text-wrap: pretty landing in Safari Technology Preview! But beware that it's different from how it works in Chromium browsers.

CSS-Tricks Chronicles XLIIICSS-Tricks Chronicles XLIIIApr 23, 2025 am 09:35 AM

This CSS-Tricks update highlights significant progress in the Almanac, recent podcast appearances, a new CSS counters guide, and the addition of several new authors contributing valuable content.

Tailwind's @apply Feature is Better Than it SoundsTailwind's @apply Feature is Better Than it SoundsApr 23, 2025 am 09:23 AM

Most of the time, people showcase Tailwind's @apply feature with one of Tailwind's single-property utilities (which changes a single CSS declaration). When showcased this way, @apply doesn't sound promising at all. So obvio

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.