What is the best way to responsively scale multiple overlay images in CSS?

I am facing an issue with multiple images overlaid on top of a background in my web design. Here's a sample code snippet that showcases the problem:

<div style="position: relative; left: 0; top: 0;">
    <img src="images/background.png" style="position: relative; top: 0px; left: 0px;"/> 
    <img src="images/overlay1.png" style="position: absolute; top: 20px; left: 20px; "/>
    <img src="images/overlay2.png" style="position: absolute; top: 40px; left: 40px; "/>
</div>

When the browser is in full screen mode, everything appears as intended. However, upon resizing the browser window, only the background image scales proportionally while the overlay images remain static at their original positions. Attempting to change all position attributes to relative messes up the positioning of the overlay images.

I'm seeking advice on how to modify this setup so that all images within the div tag scale correctly relative to each other. Just to provide more context, I am utilizing Twitter Bootstrap 2.3.2 as the default CSS theme.

For additional information, all images have fixed dimensions - for instance, the background is 640x480 positioned at 0, 0. The overlays also have set sizes and are meant to align precisely with the background image. One overlay might be 64x64 positioned at 15, 24 (top, left), while another could be 128x128 placed at 200, 231, and so forth. It's crucial to maintain these specific overlay positions for the overall composition to appear complete.

htmlcsstwitter-bootstrapresponsive-design

Answer №1

If you want to maintain consistent proportions when adjusting the size of your browser window, it is recommended to use percentage values for both the dimensions and positioning of overlays.

In this scenario, all elements are static, so the conversion from pixels to percentages can be achieved using a simple formula:

% value = px value / container px value * 100

For instance, considering Overlay 1 with dimensions (64x64) and position (24,15):

width = 64/640*100 = 10%
top = 15/480*100 = 3.125%
left = 24/640*100 = 3.75%

To implement this, set the overlays as absolutely positioned and assign the calculated values to each property:

.container {
    position:relative;
    width: 100%;
    max-width: 640px;
    line-height: 0;
}

.container img{
    max-width: 100%;
}

.overlay1{
    width: 10%;
    position: absolute;
    top: 3.125%;
    left:3.75%;
}

.overlay2{
    width: 20%;
    position: absolute;
    top: 41.666%;
    left: 36.09%;
}

Explore the Sample fiddle

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Enhancing the style of the top menu Index by applying a border-bottom effect when hovering over it in a CSS Horizontal Drop Down Menu

I'm having trouble adding a border-bottom: 1px solid #FFF to all the top menu (index) items when they are hovered over. Can anyone help me with this? #menu{ padding:0; margin:0; position: fixed; top: 30px; left: 0px; font-size ...

htmlcss

How can I adjust the appearance of an HTML tag within an Angular component?

I have created an Angular component with the following definition: import { Component, Input, Output, EventEmitter } from '@angular/core'; @Component({ selector: 'rdc-dynamic-icon-button', templateUrl: './dynamic-icon-button. ...

htmlcssangular

Align select and number inputs vertically in Firefox

How can I achieve vertical alignment for these inputs on Firefox? The alignment works perfectly in Chrome, Safari, and Opera, but not in Firefox (Version 57 tested on macOS, Windows, and Linux Mint). While removing type="number" from the input resolves th ...

htmlcssfirefoxvertical-alignment

The Safari 7.1+ browser seems to be having trouble with the spotlight effect

Why is the CodePen not functioning properly in Safari? Despite working well in Chrome and Firefox, it completely fails to work in Safari 7.1+. Can anyone provide some insights? http://codepen.io/cchambers/pen/Dyldj $(document).on("mousemove", function( ...

javascriptjqueryhtmlcsssafari

Automatically resizing images in a canvas when their resolution exceeds the canvas size in HTML5

I am currently using Html5, fabric.js, and JavaScript to upload multiple images to a canvas. However, there are instances where the uploaded image size exceeds that of the canvas. I am looking for a way to ensure that the image is set to a fixed size. v ...

javascriptcsshtmlcanvasfabricjs

The Web Browser is organizing CSS elements in an alphabetized sequence

map.css({ 'zoom': zoom, 'left': map.width()/(2*zoom) - (point[0]/100)*map.width(), 'top': map.height()/(2*zoom) - (point[1]/100)*map.height() Upon observation, it appears that Chrome adjusts the map zoom first be ...

javascriptjqueryhtmlcssinternet-explorer

Integrating md-chips md-separator-keys with md-autocomplete: A step-by-step guide

My experience with using md-chips and md-autocomplete reveals an issue: when I incorporate md-separator-keys, it functions as expected. However, upon adding md-autocomplete, the md-separator-keys functionality ceases to work. This is how my code is struct ...

htmlangular-material

Learn how to dynamically add a class to an element when hovering, and ensure that the class remains even after the mouse has

I'm facing difficulty with this task - when hovering over elements, an active class should be added to them. However, when moving the mouse to another section, the active class should remain on the last element hovered. Additionally, the first block s ...

javascriptjquerycss

Navigate directly to the section on the page that discusses the hashtag

So, I have a unique scenario to address. I'm working with two div elements where only one should be visible at a time. Here's the situation: The first div serves as an introduction page with a button that hides it and reveals the second div. Th ...

javascriptjqueryhtmlhashtag

What is the best method for sending PHP data to an HTML file?

Once the user logs in, I aim to direct them to a separate HTML page (a landing page) that greets them with "welcome, (user)." I initially attempted to utilize cookies for this functionality but realized it isn't feasible. How can I achieve this? Here ...

phphtml

Is it possible to identify horizontal scrolling without causing a reflow in the browser?

If you need to detect a browser scroll event on a specific element, you can use the following code: element.addEventListener('scroll', function (event) { // perform desired actions }); In order to distinguish between vertical and horizontal ...

javascripthtmlreflow

Validating HTML Forms Using PHP

I am experimenting with a basic HTML login form, but I can't seem to get it to function properly. This is all new to me as I am just starting out with PHP programming. Any assistance would be greatly appreciated! <?php $correctPassword = 'ho ...

phphtmlformsauthentication

`Troubleshooting: Inability to chain selectors for custom styling in Next JS module`

When I chain selectors in a CSS file, the styles don't seem to apply as expected. I'm importing the styles into the component and it only applies for the main class. For example: import styles from './Home.module.css' const Home = () = ...

cssnext.js

Content displayed in the center of a modal

Struggling to center the captcha when clicking the submit button. Check out the provided jsfiddle for more details. https://jsfiddle.net/rzant4kb/ <script src="https://cdn.jsdelivr.net/npm/@popperjs/<a href="/cdn-cgi/l/email-protection" class=" ...

javascripthtmlcssbootstrap-5

What is the best way to bring my image to life and move it to

Just starting out with HTML and CSS. Can anyone help me learn how to animate my image so that it moves from its current position to another location? For example, transitioning from "top: 280px; left: 600px;" to "top: 180px; left: 500px;" I'm looking ...

htmlcss

Tips for customizing text color in a disabled MUI TextField?

In the disabled TextField, I want the text color to be black instead of the default gray. I attempted the following after finding inspiration from this source: <TextField id="outlined-basic" value={'https://git.responsive.software/my-app ...

cssmaterial-uitextfield

The CSS transition is failing to revert to its original state after being combined with animations

My goal is to create a loading animation using CSS transitions and animations. I have managed to achieve the initial loading effect by scaling with transition and then animating it to scale out on the x-axis. However, when attempting to transition back to ...

htmlcsscss-animationscss-transitions

Use jQuery to trigger a click event when an element is in focus, unless it was clicked to

I am currently developing a website using the MDL framework. One issue I encountered is that there is no default select form element provided. After some research, I found a solution by utilizing a menu component that displays when the input is clicked. Th ...

javascriptjqueryhtmlmaterial-design-lite

The iPhone display scaling issue is causing difficulty viewing the entire website

Currently experiencing difficulties with a page that lacks sufficient content, resulting in a smaller height. As a result, the iPhone is scaling the page and cutting off the full menu bar (960px wide). I attempted to set a minimum height using a media quer ...

iphonehtmlcssmedia-queries

Incorporating additional value attributes without replacing the existing ones

Is there a way to add a value attribute through jQuery without removing the old attribute, similar to how addClass works? I have 7 input fields that are being typed in, and I need to combine them into one word and pass it to another input field. When I try ...

javascriptjqueryhtmlcss