Скачать или смотреть How to Position a Div Relative to Its Parent Using CSS

Discover how to effectively position a div relative to its parent in CSS for a seamless responsive design without relying on margins.
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This video is based on the question https://stackoverflow.com/q/62303187/ asked by the user 'Wood' ( https://stackoverflow.com/u/10786256/ ) and on the answer https://stackoverflow.com/a/62303287/ provided by the user 'Temani Afif' ( https://stackoverflow.com/u/8620333/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering CSS: Positioning a Div Relative to Its Parent

Positioning elements in web design can often be tricky and convoluted, especially when it comes to getting everything aligned perfectly. If you've ever found yourself struggling to position a div relative to its parent element—as was recently asked—then this article is for you.

The Problem

When trying to position a yellow highlight (which we will refer to as a "surligneur") behind text such as "GRATUITE", it can be frustrating when elements don't align as intended. For instance, a developer wanted to create a clean design with text that seamlessly integrates with backgrounds but encountered issues when using margins for instance. The goal was to ensure that everything remains responsive across different devices, which is a common challenge in front-end development.

Understanding Positioning in CSS

Before diving into the solution, it's important to have a basic understanding of how positioning works in CSS:

Static: Default positioning. Elements are placed in the normal document flow.

Relative: Positioned relative to its normal position in the document flow. This means using properties like top, right, bottom, and left moves it without affecting surrounding elements.

Absolute: Positioned relative to the nearest positioned ancestor.

Fixed: Positioned relative to the viewport; it stays in place when the page is scrolled.

Sticky: Acts like static until it reaches a defined scroll position.

In our scenario, we want to utilize relative positioning to achieve the desired effect.

The Solution

Updated Code Structure

HTML Structure: We will keep our HTML relatively simple to ensure clarity and maintainability.

[[See Video to Reveal this Text or Code Snippet]]

CSS Styles: Adjust the CSS to provide the necessary background styling using gradients for the yellow highlight, allowing us to position elements precisely without relying on traditional margins.

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the CSS

Background Gradient: The use of linear-gradient to fill the span’s background area gives a cleaner look without needing to rely on divs.

Size and Positioning: Adjusting background using bottom / 100% 50% ensures that our yellow highlight starts from the bottom of the text and covers just enough width to encapsulate the text within the span.

Conclusion

By restructuring our HTML and optimizing our CSS, we’ve effectively eliminated unnecessary complexity while achieving a responsive design.

Utilize CSS gradients for background colors.

Adopt a minimalistic HTML structure for easier adjustments and responsiveness.

Familiarize yourself with different positioning techniques to better handle layout issues.

Remember, in web design, maintaining simplicity often leads to more elegant solutions. Feel free to apply these techniques in your projects, and you won't be disappointed!