Table of Contents
Reply to the discussion (solution)
Home Web Front-end HTML Tutorial Image width processing problem_html/css_WEB-ITnose

Image width processing problem_html/css_WEB-ITnose

Jun 24, 2016 am 11:41 AM

There is a picture with a pixel size of 1920X500. Please tell me how it can be displayed vertically and centered on screens with different resolutions such as 1920, 1280, 1024, etc. For example, on a 1024 resolution screen, only the width of 1024 in the middle of the picture is displayed, and the height is 500. Please tell me.


Reply to the discussion (solution)

I remember seeing an example before (I forgot where), where the background image was set through js Position, the calculation formula seems to be to set the vertical coordinate of the picture to half the height of the screen minus half the height of the picture. Can you try it?

I remember seeing an example before (I forgot Where is it), the position of the background image is set through js. The calculation formula seems to be to set the vertical coordinate of the image to half the height of the screen minus half the height of the image. If you try it, you can achieve different results


I'm a newbie and not familiar with JS. Could you please give me an example? Thank you!

I don’t know how basic your css is. . . Here you need to use css and js together
1. First, the image must be absolutely positioned
position:absolute;
2. Then the left offset of the image is 50%
left:50%;
At this time, you will find that the image will be skewed to the right
3. Add left margin
3.1 If your image has a fixed width of 1920, add a margin-left
to the image margin-left:-960px;
3.2 If your image is not of fixed width, you need to use js to add margins (the principle is to get the width of the image, and then the left margin is half the negative width)
document.getElementByTagName("img").style.marginLeft= -(document.getElementByTagName("img")[0].width/2) "px";

I don’t know how basic your CSS is. . . Here we need to use css and js together
…………


I am also new to CSS

Can any expert give a detailed example? I’m just getting started with CSS and I don’t know JS! ! !

Statement of this Website
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

Hot Article Tags

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Difficulty in updating caching of official account web pages: How to avoid the old cache affecting the user experience after version update? Difficulty in updating caching of official account web pages: How to avoid the old cache affecting the user experience after version update? Mar 04, 2025 pm 12:32 PM

Difficulty in updating caching of official account web pages: How to avoid the old cache affecting the user experience after version update?

How do I use HTML5 form validation attributes to validate user input? How do I use HTML5 form validation attributes to validate user input? Mar 17, 2025 pm 12:27 PM

How do I use HTML5 form validation attributes to validate user input?

What is the purpose of the <iframe> tag? What are the security considerations when using it? What is the purpose of the <iframe> tag? What are the security considerations when using it? Mar 20, 2025 pm 06:05 PM

What is the purpose of the <iframe> tag? What are the security considerations when using it?

How to efficiently add stroke effects to PNG images on web pages? How to efficiently add stroke effects to PNG images on web pages? Mar 04, 2025 pm 02:39 PM

How to efficiently add stroke effects to PNG images on web pages?

What is the purpose of the <meter> element? What is the purpose of the <meter> element? Mar 21, 2025 pm 12:35 PM

What is the purpose of the <meter> element?

What are the best practices for cross-browser compatibility in HTML5? What are the best practices for cross-browser compatibility in HTML5? Mar 17, 2025 pm 12:20 PM

What are the best practices for cross-browser compatibility in HTML5?

What is the purpose of the <datalist> element? What is the purpose of the <datalist> element? Mar 21, 2025 pm 12:33 PM

What is the purpose of the <datalist> element?

What is the purpose of the <progress> element? What is the purpose of the <progress> element? Mar 21, 2025 pm 12:34 PM

What is the purpose of the <progress> element?

See all articles