Dynamic css variables react Apr 10, 2021 · I'm trying use use a variable in a class name with css modules in nextjs, but I'm having a bad time figuring out the right syntax. Jun 1, 2017 · CSS Custom Properties (perhaps more easily understood as CSS variables) provide us ways to make code more concise, as well as introduce new ways to work with CSS that were not possible before. Dynamically switch CSS files in React. Mar 20, 2025 · Project 2: Setting CSS variables dynamically with JavaScript. CSS Variables are a newer browser spec. We'll walk through spinning up a new React app, cre May 17, 2024 · Tailwind CSS and React are a great duo for building front-end web applications, but sometimes they have a tendency to create unruly frustration. css is imported in the src/App. However, I have been unsuccessful in resolving the issue. Feb 6, 2023 · I am trying to use a variable to create a progress bar by using two views and setting the width equal to a percentage of the parent view. And arrow functions for dynamic styles; The following are not allowed: Function calls (except StyleX functions) Values imported from other modules (except for CSS Variables created using StyleX from a . So though your answer does work, it's not ideal and I'm hoping for a cleaner solution where I just update the values in the CSS and all the components reading from it will automatically update. I’ll give you the concept for both Class components approach and Hooks approach. Use the dynamic value to generate the full class name in your code. Aug 28, 2013 · See demo on Codepen Dynamic CSS Animations with CSS Variables. So if there is only one version of antd in your application, you can choose to disable hash to further reduce the total size of the styles: Apr 21, 2017 · Hey Michael, thanks for following up! I'm using React and a don't want to do 'if / else' statements for css for all of my components for picking the CSS. Since you are entering an unknown property, it fails the type check. Value types match other CSS values. The part of the outputted css that we care about looks like this, here's a link to a demo on the playground. js import React, { useState, useEffect } Jun 3, 2022 · In TypeScript, React's style property types are mapped to actual CSS properties (minHeight => min-height, etc). If you want to override a component's styles using custom classes, you can use the className prop, available on each component. You can declared a CSS variable like this --my-width: 123px in you stylesheet, and you can reuse this variable in the following manner: width: var(--my-width);. scss file and create a «root» selector, which will later help us use the variables throughout the project. create function. 3. cell { width: var(--width); height: var(--height); } Then you can supply the values of the CSS variables in a parent container (CSS variables also cascade down): May 10, 2018 · In React you can pass dynamic style either by passing object as mentioned here: React. They help reduce repetition by allowing you to define reusable values throughout your CSS. This is a fairly CSS Modules can easily integrate with CSS or SCSS styling engines. Additionally, readers will grasp insights into dual and multi-theming variations. This is assuming that index. Custom properties are accessed using the CSS var() function (e. I'm stuck on how to achieve this. Dynamically style components passed as props. 8, we added a new {fn}. With this in mind, the app I am building is a prototype so I am not too worried about supporting older browsers here. I am used to MUI and there its quite simple like &lt;Box sx={{ width: dynamicValue }} /&gt; How do I do such Mar 18, 2020 · Let's start by creating CSS variables first, for this we’ll go to the css-variables. Jul 26, 2024 · To dynamically update SCSS variables using React JS we need to install the sass npm package that compiles and translates the SCSS file to CSS styling. It can be useful, for example, in Storybook args or custom react props. 1- Duplicate the values of those variables. I would like to do this using Tailwind's utility classes. Now that we have them available right in our browsers, how can we use JavaScript and tools like React to dynamically update the values? You could try CSS custom properties on the CSS properties that are dynamic (eg, width and height): // cell. Solution #1: Using a Theme Dec 31, 2024 · Defining CSS Variables. The document. On the "Edit Landing Page" view, I want to be able to load the associated stylesheet for whichever landing page the user is editing. stylex. Mar 22, 2025 · Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that represent specific values to be reused throughout a document. Apply multiple CSS variables to any HTML element. To set a Tailwind CSS class name dynamically, I will use a Heading component as an example. create packs and "send" the style to the native zone only once. We'll see how to get the most out of CSS-in-JS tools like styled-components, and how our mental frame around media queries has been wrong all along. So for mt MyCustomButton component, I defined the required CSS variables first. Use Native JavaScript to Set Dynamic className Values in React. Inheritability: Variables can be easily inherited, simplifying the management of styles. For example, I will make the color variables of the flag of Germany, in order to further use them as the main color scheme in the project. We will create a new css file for our tailwind imports, and import that file into src/css/app. <View className='w-full h-10 bg-blue-500'> <View className={`w-[${percentage}] h-10 bg-blue-300`}/> // this uses back ticks, which works for px values Dec 26, 2022 · In the component mapped receiving these props, I already logged the color variable and it's logging correctly. variables. To start using CSS variables in a TypeScript React project, you first need to define your variables in a CSS file. You can define css variables by using two hyphens, when you define the variable it is important to remember that whatever selector you use will be where the variable scope can exist. It allows you to represent your conditional classes as an object and returns those that evaluate to true. Let’s explore specific ways to do that in React. To get a handle to such Element, you can use the useRef hook: Mar 20, 2024 · This means that we cannot simply define CSS variables for colors in our main CSS file. I thought I'd use inline style attribute so each icon can have a different color when it's hovered over. We will apply a dark theme to the page when the switch button is clicked. Modified 4 years, 9 months ago. css. This function is an identity function and only serves as a hint for the compiler to extract the css. How to apply a CSS style dynamically using React JS? 1. It seems you cannot use CSS variables to set an animation-timing-function inside a React - JSS Dec 19, 2016 · Dynamic css animation variable with React. Dynamic Theming: create and manage themes for your application. how to add dynamic css in react js. Dynamically format styles in CSS. Aug 22, 2018 · CSS Variables Browser Support. css to a new directory: src/css/app. An enterprise-class UI design language and React UI library with a set of high-quality React components, one of best React UI library for enterprises Dec 15, 2021 · Apply dynamic css property to a div using the styled props. CSS variables are defined using the syntax::root { --primary-color: #3498db; --font-size: 16px; } Two dashes indicate a custom property. Jul 15, 2018 · To follow my last post, about some of the different ways CSS styles can be defined in the context of a React web app, I wanted to look at… Jun 25, 2018 See all from Kevin Randles The Original, and Less Powerful, CSS Variable. I define the custom CSS like so: const dropzoneStyle = { width: `200px`, height: `200px`, backgroundColor: `#1DA1F2`, }; Nov 10, 2021 · How to use css variables with React. They generate unique class names that are void of conflicts and have built-in support in React. Aug 9, 2019 · Option 1: Using css modules, assign a variable of styles with the response from the import based on the condition. css one time, but if you need to swap between 2 files, it won't. This allows for Oct 9, 2023 · Tailwind can now happily compile the class, it's name is no longer dynamic, it's . 1. We don’t recommend runtime <style> tag injection for two reasons: Jul 10, 2021 · I have two CSS files one for Light theme and other for Dark theme. But when I try to use that variable to dynamic change the color of the component, it doesn't work at all. my variable comes from the api: const type = red how i'm trying t Feb 25, 2016 · With Css : You can also use a separate css file containing the different styles needed inside classes, and depending on the context you add or remove those classes to your elements. 2. For my use case, I need to sync the SASS Jun 25, 2024 · Unlock the Power of Dynamic Themes with Custom CSS Variables in React Jun 25, 2024 - 13:43 • 4 min read In the ever-evolving world of web development, creating a seamless user experience is of paramount importance. style. Nov 24, 2016 · If you add the root css variables in index. js or constants. Here are five alternatives; each has its pros and cons. If I have a var in CSS that is set to blue (--color:blue) and say I want to update it to red so that everything that reli Mar 31, 2015 · @DominicTobias Stylesheet. myOtherClass { background-color: blue; }. React styling with Tailwind CSS Jan 17, 2022 · It has to do with how the Purge CSS works. By following the best practices detailed in this post, you can enhance your web applications and create a dynamic user experience. Jun 26, 2017 · I'm using react-dropzone to allow a user to upload a profile photo. Or you can also pass inline like: <div style={{ height: '10%' }}> Hello World! </div> One note though, the css properties will be in camelCase, e. css and output a new css file to the original src/App. Here are a couple of solutions I came up with. import 'react'; declare module 'react' { interface CSSProperties { [key: `--${string}`]: string | number } } Oct 8, 2024 · Example of CSS Variable Definition::root { --primary-color: #3498db; --secondary-color: #2ecc71; } Benefits of Using CSS Variables in React. However, with the ReactJS style attribute, you can compute styles dynamically based on the state or props of your components. borderBottom: '10px' There are multiple methods to pass dynamic values to CSS in React, each with its advantages and use cases. css files. CSS Features: Some CSS features, like pseudo-classes or media queries, are not available with the ReactJS style attribute. They can do what preprocessor variables can… but also a lot more. It's important Jun 3, 2023 · I would like to pass a prop to assign a background color to a table. , --primary-color: blue;). 0. These variables are now accessible globally using var(). I know it’s possible to use inline styling to set CSS variables too, but I don’t like the syntax for inline styling and this would not work for the dynamic content coming from an external source, since we don’t have control over the HTML structure. Let’s start by understanding the syntax and usage of CSS variables. Sep 17, 2023 · Dynamic imports in React allow you to dynamically load JavaScript modules at runtime, which can significantly improve your application’s performance and load times. js file. The name can be almost anything, but kebab-case is conventional. How can I dynamically change that by accessing the opacity value of my CSS class? Apr 19, 2020 · We are going to move the current src/App. You have learned how to override the style of a Material-UI component in the previous section. Add them both on your variables. They are set using the @property at-rule or by custom property syntax (e. You can also link to another Pen here (use the . Mar 10, 2014 · update CSS variables in React dynamically? Hot Network Questions Is it normal that a professor in a class I am taking asks to design a graduate course in return of 40% of the course grades? Mar 18, 2022 · Configuring Tailwind CSS. . It’s very close to 100% browser support. Conditional and Dynamic Styles Sep 30, 2018 · So, if you want to use CSS Variables to change Material UI components styles, for example - for Drawer (that uses React-Portals to lift up a component to top level of the DOM). background { background: red; opacity: 1; // How do I make this value change based on this. in your css file you can have classes like. ts file, then you will be able to use any CSS variable as long it starts '--' and that is string or number. That being said, there are some folks who have put out some shims for IE. This rarely used but widely supported variable, refers to the current color value of an element. config. I have tried various solutions, including dynamically constructing the class names and using the correct syntax for Tailwind CSS classes. Look at the screenshot below to see our folder structure and what we keep in the variables. Apr 30, 2024 · Dynamic Styles: CSS doesn't inherently support dynamic styles. It’s a React component that accepts a level prop and returns h1-h6 HTML heading element depending on Sep 6, 2024 · We‘ve covered numerous techniques leveling up web app theming capabilities combining CSS variables and React context: CSS variables provide universal design tokens ; Context API enables data flows to any component; Build theme provider wrappers with toggles ; Dynamically generate themes by modifying base ; Integrate with popular UI frameworks However, after enabling CSS variables, the component styles of the same antd version will not change with the token —— because we use CSS variables to fill in the dynamic parts of the styles. , {style}) Creating styles Styles must be created with the stylex. I wrote an article about it on my blog with some examples, hope it's useful for some of you. you can simply put this module declaration merge using string templates at the top of the file or in any . Long and short of it is that, if you check the tailwind config file for the path to scan for tailwind classes and then scan for classes that appears as a substring and hence the dynamically generated ones fail in your case. ” To utilize this technique, create a CSS file in your project directory, in which you’ll write your formatting styles. I am used to MUI and there its quite simple like &lt;Box sx={{ width: dynamicValue }} /&gt; How do I do such Sep 17, 2019 · In this article, I’ll explain how to handle (update) CSS variables in React. Nov 10, 2021 · Css variables with react is one of the simplest, easiest and most powerful ways to style and theme your application with ease, find out how to in this post! This app works best with JavaScript enabled. css modules are scoped meaning that the variables inside them are local, but that does not mean you cannot access variables from a global css file Users can switch between color schemes, and the website will update to reflect the chosen scheme dynamically. js file as the default file structure. I can define a CSS variable as --my-var: 10px and then access it with margin-top: var(--my-var);. This is how I would like it to look when expand Mar 12, 2023 · I am learning tailwind in react and want to put dynamic value into css using tailwind. Implementing CSS Variables in TypeScript React. js. Oct 20, 2021 · CSS variables have been around with tools like Sass, but only recently have they become native to CSS. You can define one or You are right in a way, we cannot update scss variables directly, thus having a css variable placeholder helps in dynamic updation. Conclusion. Tailwind allows us to assign Oct 23, 2022 · I searched a bit but didnt really find something that directly solved this. Imagine that you have a primary and a secondary button. Jun 9, 2022 · Tailwind doesn’t include any sort of client-side runtime, so class names need to be statically extractable at build-time, and can’t depend on any sort of arbitrary dynamic values that change on the client. React apply css classes dynamically. Mar 7, 2022 · In our src directory we create a file called variables. We need to dynamically set the theme based on environment variables. Jan 31, 2022 · With CSS variables, you can achieve several styling outcomes that are not possible with vanilla JavaScript. Luckily, we found this very helpful article to get us started. js that way you'll be able to reference these values from your react components, the downside to this, is you'll have to remember to change them in two places if you have to modify the value. Of course, all of this works with React Server Components and Server Side Rendering because it is all computed at compile time and the classes are injected into the code as strings. props. However, referencing class names with CSS Modules can oftentimes be confusing. If you want to apply it only on your React component, then simply set it on that component Element. – Shujath Commented Nov 7, 2020 at 17:27 Oct 26, 2018 · There are different ways I can recomend you to tackle this. The primary approaches include: How to Use Inline Styles with Dynamic Values in React? Inline styles allow you to apply styles directly to elements using the style attribute. scss and as constants in some other file, maybe config. Did you know you can set CSS variables using Tailwind classes? This can come in handy when you have to add theming to a component with dynamic HTML, or when the theme is decided based on data coming from external sources. setProperty('--primary-color', 'green') Dec 20, 2023 · This is within React and Tailwind CSS to create dynamic theming. g. Jul 12, 2023 · Notice how the link and list item bullets coming from the external HTML are now yellow. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself. The previous example will work if you need to import a . CSS Modules also fix global scope issues for CSS declarations. css URL Extension) and we'll pull the CSS from that Pen and include it. Consuming CSS Variables You can apply CSS to your Pen from any stylesheet on the web. , color: var(--primary-color);). setProperty method is used to set CSS variables dynamically with JavaScript, updating CSS variables in real-time without modifying the style sheet: document. documentElement. Steps to Create React Application and Install Modules: Step 1: U se this command in the terminal to Initialize the react 2. However Tailwind has no ability to deal with the arbitrary values computed dynamically. That's very useful when you're applying the same style to many CSS classes, you don't Dynamic Styling: Utilize JavaScript variables and conditions to dynamically change styles. js file, which is where all the magic happens. Mar 12, 2023 · I am learning tailwind in react and want to put dynamic value into css using tailwind. Theming: CSS variables make it easy to implement and switch themes dynamically. Which means that when you're reusing the same style multiple times, or loading the same component multiple times it's gonna reuse the style instead of packing and "sending" again. For example::root { --primary-color: #007bff; --secondary-color: #6c757d Mar 30, 2024 · I also explored the creation of CSS root variables and their implementation while styling React-based web applications, which adds little bit of dynamic experience to the stylesheet. As of v0. js inline style best practices. Apr 13, 2020 · This tutorial shows how we can use them with React to create dynamic themes. Implementing Dynamic Styling with CSS Variables Creating a Color Scheme. Applying Styles Based on Feb 2, 2024 · Some of them will be constant, while others will be applied dynamically. Since this is just a demo of a how-to vs Dec 24, 2020 · Note. CSS Custom Properties or variables are a great way to update styles in your app without using pre or post processors or creating additional CSS classes. Bear in mind that you can't unmount imported . Oct 18, 2024 · Unlock the full potential of dynamic styling in your React applications by harnessing the power of Emotion CSS variables, a game-changing combination that revolutionizes the way you write and manage CSS. const primaryColor = "#000000"; const secondaryColor = "#ff0000"; const notCheckedColor = "#9CA3AF"; export { primaryColor, secondaryColor, notCheckedColor }; Sep 20, 2017 · I have a common style (style), and then I have the variable part which is the image. The next step is to link that CSS variable to some Tailwind CSS classes to use. The simplest way to add dynamic className values is to combine curly braces and set the className attributes equal to the state variables. style Dec 14, 2024 · By using CSS variables, you can create a centralized style configuration that can be updated dynamically. Learn how to create CSS Variables (Custom Properties) and dynamically update them in a React application. css . Jan 4, 2022 · The above code set "w-[${p}%]" as "w-80%" dynamically on the server side. Wisely using CSS variables can also go a long way to improve the maintainability of React Native applications. At this point, we have a CSS variable declared in our HTML (which could be connected to our backend). documentElement, it will affect all your Elements. Aug 20, 2021 · Once again, go ahead and copy the git gist below into src/App. css you can access these globally without using @import. How to dynamically change the style sheets ? Here is the code i am currently using in __app. To achieve this, we have to focus on the tailwind. Setting Class Name Dynamically. Dynamic variation for a one-time situation. We will have PostCSS read in src/css/app. The problem was that by MUI lifted up components were out of the 'root' div and CSS Variables could not reach these components. They are very similar, but you want your primary button to have a CSS Variables in React: manage your component design in a fast and convenient way. Dynamic CSS Apr 13, 2020 · This tutorial shows how we can use them with React to create dynamic themes. raw() method to css, patterns and recipes. Oct 8, 2024 · Incorporating CSS Variables into your React applications offers a plethora of advantages, including easy theming, maintainability, and improved performance. The point of dynamic styling is saving time and writing less CSS. React, a popular JavaScript library for building user interfaces, can seamlessly integrate with CSS variables to manage dynamic styling. CSS variables are also quite useful in implementing animations in React Native. Gone are the days of wrestling with unwieldy stylesheets and battling specificity issues. myClass { background-color: red; } . TypeScript Support: The library is written in TypeScript, offering type safety and enhancing developer experience. css You can delete what is already in there because this is all the CSS rules we need. Utilization of CSS Variables in Tailwind for Jul 27, 2022 · The React working group have given a lukewarm signal to dynamic CSS-in-JS libraries. Oct 7, 2023 · CSS variables, also known as CSS custom properties, offer more flexibility and dynamic styling in CSS. Theming Made Easy: CSS Variables enable effortless theme switching by simply changing the root variables. ) Object spreads (e. 073892020. Css variables are supported in most browsers so in order to use css variables with React all we need to do is write some css. d. Ask Question Asked 4 years, 9 months ago. Variables can be scoped to specific selectors and can be easily updated and retrieved dynamically using JavaScript. Use inline styles for these situations, or combine Tailwind with a CSS-in-JS library like Emotion if it makes sense for your project. Jan 24, 2024 · My Task is that I will get a hex code from database and depending on the hex code, colors should change. Responsiveness: They can adapt to different screen sizes and conditions, enabling more responsive designs. We will create a script to run PostCSS before our app starts. opacity } FYI this. Is it possible to do sth like this? I am using fluent ui react-components version 9 for instance: const useStyles = makeStyles({ Feb 12, 2024 · This step dynamically changes the theme-mode attribute of the document's root element, allowing CSS to react and apply the corresponding styles for the selected theme. after\:p-\[var\(--customPadding\)\] and it's value is no longer dynamic, it's var(--customPadding). In my IconGrid component I've created an array of objects, each has an image and the image color respectively. import React, { useState } from 'react' const MyComponent = => { const [isClicked, setIsClicked] = useState (false) const buttonStyles = { backgroundColor: isClicked ? Jun 25, 2020 · Dynamic css animation variable with React. Define CSS Variable w/o Styled Jul 3, 2023 · For instance, there are CSS variables to store dynamic values, selectors to pick out child elements with precision, and new pseudo-classes such as “:is” and “:where. css file. Integrating CSS Variables with JavaScript Frameworks Using CSS Variables in React. I convert a component from CSS-in-JS to CSS modules and inline styles, and give a positive outlook for adding Tailwind to the mix. So as an example from its React documentation: Dec 5, 2023 · Through the magic of CSS variables, any Button inside that div will now get that theme. Is there any way to export/pass a state variable to an external CSS file in ReactJS. To use dynamic values in CSS, one approach is through CSS Variables. ‍ Jul 19, 2023 · CSS variables, or custom properties, are a powerful feature that provides a dynamic aspect to CSS. Oct 29, 2020 · Depending on how many dynamic classes you need to add as your project grows it's probably worth checking out the classnames utility by JedWatson on GitHub. The official Tailwind docs say; To work around this problem, we need to use style attribute like following in which we are not able to use TailwindCSS anymore😅; Jan 4, 2023 · Do not use partial names along with dynamic values. Before we begin to discuss CSS custom properties and dynamic CSS variables, it should be noted that for a long time now, CSS has had a sort of variable, and that is the currentColor keyword. opacity has values from 0 to 1 and it looks like this: 0. Hello! I have a header bar, and I'm trying to have it display / hide when the user click a button a toggles a boolean React component state variable. Jan 20, 2023 · Because you modify the CSS variable/property on the common top document. This technique is particularly… Jan 7, 2022 · CSS Variable # Modern browsers can render CSS styles from CSS variables with the var() function. To override the styles of a specific part of the component, use the global classes provided by Material UI, as described in the previous section "Overriding nested component styles" under the sx prop section. May 25, 2022 · Trying to do a drop-shadow hover effect in react. Dynamic styling with styled-components. These are the main parts we will need to implement: A React context that applies CSS variables to an application's root. I'm building a CMS system for managing marketing landing pages. Overriding styles with class names. If you use CSS-in-JS, we recommend a combination of the first two approaches (CSS files for static styles, inline styles for dynamic styles). They advocate for static CSS extraction with dynamic styling relegated to inline styles. Now, let's see how we can make these overrides dynamic. To declare a CSS variable, we use the --prefix followed by the variable name. Nov 16, 2020 · Now, after this brief introduction to the wonders of styled-components, let's focus on the dynamic styling part. One of the most common uses of CSS variables is to define a color scheme for your May 15, 2023 · Besides, using css variables prevents reusing tailwind’s built-in colors, or using your own JSON object for define them. They allow us to define reusable values that can be used throughout our stylesheets. Now that we have them available right in our browsers, how can we use JavaScript and tools like React to dynamically update the values? There are multiple methods to pass dynamic values to CSS in React, each with its advantages and use cases. May 28, 2023 · However, when I set the color prop to "blue", the expected blue color is not being applied to the component. The CSS:. and dynamic themes using native CSS variables Jun 19, 2023 · Defining CSS variables. kzrx qkurcw vgegrgxm qnh rtpa scqupm ysvr jchcu vrxwu qis rehwq kvxqfm mgtwug zeadqc hkejgudj