Скачать или смотреть Dynamically Update SCSS Variables using JavaScript in React

Learn how to `dynamically update SCSS variables` using JavaScript in React. This post covers the solution step-by-step, making the process easy to follow.
---
This video is based on the question https://stackoverflow.com/q/64729961/ asked by the user 'Shujath' ( https://stackoverflow.com/u/7977581/ ) and on the answer https://stackoverflow.com/a/64730040/ provided by the user 'Shyam' ( https://stackoverflow.com/u/1723410/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Is there a way to dynamically update scss variables using JS in react?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Dynamically Update SCSS Variables using JavaScript in React: A Comprehensive Guide

In modern web development, flexibility and responsiveness are key. One common requirement developers encounter is the need to change styles dynamically based on user interaction or application logic. For those using SCSS (Sassy CSS) with React, a common question arises: Is there a way to dynamically update SCSS variables using JavaScript in React?

In this guide, we will explore an effective way to achieve this. We will walk through the solution step by step, ensuring you have the tools you need to implement dynamic styling in your React applications.

The Problem

You have a colors.scss file with several SCSS variables defined. For instance, you might have the following variable for background color:

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

You want to change this variable based on a condition within your JavaScript logic. For example:

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

After attempting to use features like :export{} and document.documentElement.style.setProperty, you find yourself still searching for a clean solution. Fear not! We have a straightforward approach for you.

The Solution

Step 1: Define CSS Variables in SCSS

To leverage dynamic styling, you need to assign your SCSS variables to CSS custom properties (variables). This enables you to manipulate them using JavaScript. Here’s how to set it up in your colors.scss file:

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

Step 2: Update CSS Variables Using JavaScript

Next, you can easily update the CSS variable using JavaScript. Within your React component, you can set the background color based on your logic. Here’s a simple example:

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

How It Works

Define CSS Variables: By using var(--background-color) in your SCSS, you're connecting the SCSS variable to a CSS custom property.

Use JavaScript to Change Values: The document.documentElement.style.setProperty() method allows you to change the value of --background-color based on your application's logic.

React Integration: You can place this logic in a React component’s lifecycle methods or use it within an event handler to respond to user actions.

Additional Considerations

Reactivity: Ensure you are calling the setProperty() method, whenever the day variable changes. This can be managed by utilizing state within React to trigger renders accordingly.

Styling: The variable can be utilized in your SCSS styles like this:

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

Conclusion

Using CSS custom properties in conjunction with JavaScript provides a powerful way to manage and dynamically update your styles in a React application. By following the steps outlined, you can easily control SCSS variables and implement elegant solutions that respond to user interactions.

Dynamic styling not only enhances user experience but also allows for more manageable code. Start applying this technique in your projects, and watch your application's UI come to life!