Classnames vs clsx

As components can be used in different contexts, there are several approaches to this. Going from the narrowest use-case to the broadest, these are:. You might need to change the style of a component for a specific implementation, for which you have the following solutions available:. The first way to override the style of a component is to use class names. Every component provides a className property which is always applied to the root element.

This example uses the withStyles higher-order component to inject custom styles into the DOM, and to pass the class name to the ClassNames component via its classes property. When the className property isn't enough, and you need to access deeper elements, you can take advantage of the classes object property to customize all the CSS injected by Material-UI for a given component.

The list of classes for each component is documented in the component API page, you should refer to the CSS section and rule name column. Alternatively, you can use the browser dev tools. This example also uses withStyles see abovebut here, ClassesNesting is using Button 's classes prop to provide an object that maps the names of classes to override style rules to the CSS class names to apply values.

The component's existing classes will continue to be injected, so it is only necessary to provide the specific styles you wish to add or override.

A simple javascript utility for conditionally joining classNames together.

Notice that in addition to the button styling, the button label's capitalization has been changed:. The browser dev tools can save you a lot of time. Using the dev tools, you know that you need to target the Button component and the label style rule:. In this example, the withStyles higher-order component is injecting a classes property that is used by the Button component.

The components special states, like hoverfocusdisabled and selectedare styled with a higher CSS specificity. Specificity is a weight that is applied to a given CSS declaration. In order to override the components special states, you need to increase specificity. Here is an example with the disable state and the button component using a pseudo-class :disabled :. Sometimes, you can't use a pseudo-class as the state doesn't exist in the platform. Let's take the menu item component and the selected state as an example.

Aside from accessing nested elements, the classes property can be used to customize the special states of Material-UI components:. By design, the CSS specification makes the pseudo-classes increase the specificity. For consistency, Material-UI increases the specificity of its custom pseudo-classes. This has one important advantage, it allows you to cherry-pick the state you want to customize. It implements all these custom pseudo-classes:. The jss-nested plugin available by default can make the process of increasing specificity easier.

The second way to override the style of a component is to use the inline-style approach. Every component provides a style property. These properties are always applied to the root element. When should I use inline-style vs classes?

You have learned how to override the style of a Material-UI component in the previous section. Now, let's see how we can make these overrides dynamic. Here are five alternatives; each has it's pros and cons. You might need to create a variation of a component and use it in different contexts, for instance a colorful button on your product page, however you probably want to keep your code DRY. The best approach is to follow option 1 and then take advantage of the composition power of React by exporting your customized component to use wherever you need it.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have an option to mock classnames for test to provide similar behaviour.

Is there any other way to solve this issue? You are probably using css-loaderso it works with Webpack. One way to do that is using identity-obj-proxy. You can find more detail in this document. Learn more. Asked 3 years, 1 month ago. Active 1 year, 7 months ago. Viewed 1k times. Has anyone faced this issue? Here is my jest configuration in package.

12 VSCode Shortcuts and Tactics to Ease Development

Canta 1, 6 6 silver badges 22 22 bronze badges. Anil Sharma Anil Sharma 4 4 silver badges 14 14 bronze badges. Active Oldest Votes. I don't want to see css styles in test. I just want to see if element has specific class when loaded. It is in js format so that does not even require conversion from typescript file to javascript file.

Do you mind to paste your code about how you use classnames here? Sign up or log in Sign up using Google.

classnames vs clsx

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Technical site integration observational experiment live on Stack Overflow. Triage needs to be fixed urgently, and users need to be notified upon…. Dark Mode Beta - help us root out low-contrast and un-converted bits. Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled.There is an explanation of how to use classnames at the end of the article.

Earlier today, I needed to add some classes to a link. One class was passed in through a prop, but the other class would be added based on a boolean condition.

Good thing for pull requests, because that one was denied pretty quickly. So, I went Googling and figured out how to use the React classSet utility. This is a simple example, but what about the case where the class is passed in via a prop as opposed to just being switched on or off by a boolean? This try at adding classes via the React classSet utility allows us to add a class that is passed in via a prop.

Note that in this second try that we are dynamically appending our class that was passed in via the className prop to the classes object. React has deprecated React. Once you have installed classnamesyou will then need to require it in your JSX file. Once we have required classnameswe should be able to simply swap out React. Even better though, since classnames is so robust, we can just pass in this.

View all posts by Eric Binnion. How would this look if i wanted to dynamically set the className on a component in a list? I know that in WordPress. Note how we send a boolean prop that is labeled selected to the NavItem component.

This boolean is decided by comparing the id of a menu item to the filter parameter from the path. I am trying to change background color of a row of table according to the data it is showing. Eg- if status is successful its color should be green.

How can I do that? Why install a dependency and scatter a whole bunch of import statements when you can just do this:. That looks reasonable to me, and is a bit cleaner than my first approach at dynamic classes that I mention above. Your email address will not be published.

Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed. Second Try with React classSet This try at adding classes via the React classSet utility allows us to add a class that is passed in via a prop.

Using classnames instead of classSet React has deprecated React. Published by Eric Binnion. Hello there, I know that in WordPress. Hopefully this example helps. Leave a Reply Cancel reply Your email address will not be published. Working with React joinClasses.This article lists some differences between classes and structures. In this article, we will see what is the difference between a structure and a class.

Some important questions that people ask in forums is "what's the difference between a structure and a class? Those questions could particularly be posed by a Java programmer that wants to migrate from Java to. View All. Bechir Bejaoui Updated date, May 07 Structures are value types and the classes are reference types. Before proceeding to the next point, let explain the difference between the two types.

Imagine this is the memory within the machine. Classes are usually used for large amounts of data, whereas structs are usually used for smaller amounts of data. You cannot override any methods within a structure except the following belonging to the type object:. And the other polymorphism technique used for structures is implementing interfaces. Declared events within a class are automatically locked and then they are thread safe, in contrast to the structure type where events can't be locked.

A structure must always have the default parameter less constructor defined as public but a class might have one, so you can't define a private parameter-less constructor as in the following. A static constructor is triggered in the case of a class but not in the case of a structure as in the following. Fields can't be directly instantiated within structures but classes allow such operations as in the following.

Structures and classes don't adopt the same approach for the System. Equals method. Assume the following structure and class. Next Recommended Article. Net Fundamentals C heap stack Struct vs Class. Getting Started With. NET 5.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Already on GitHub? Sign in to your account. The main benefit for me is esm support which allows me to skip cjs-to-esm conversion for my rollup build. One more nice thing is that clsx is shorter than classNames. Original package is umd which is useless for bundling.

I will prefer clsx now. We may even mention about it in docs. People will use whatever appears in this project. I will migrate pickers too. I'm curious about arguments for name mangling in dev code.

As for the classnames vs clsx argument: What do you achieve by having esm support over cjs support?

classnames vs clsx

I only ever thought about this in terms of tree shaking and since both are just single function packages I don't see where you would gain bytes by tree shaking. Is a micro benchmark really the argument here?

Does anybody have stats on portion of execution time a classNames call has over a render call? Note about bundle size: Again this only apply in isolation.

How many packages are already pulling in classnames into their bundle? If they do then this will create a B overhead. If not then how many bytes would this save over classnames? We should have answers to this before throwing out a battle tested package with 2. Even if the author is well known we should not make these decisions lightly. It was already asked.Here are 12 VS Code shortcuts and tactics to ease development. I hope that by reading this post you will adopt something new to your development flow for your upcoming projects!

Pressing this key combination will open up the settings that your VS code editor is using. However, this will directly open up the settings as a graphical user interface.

You can either open up the settings interface and manually click on the Open Settings JSON button to the top right, or you can also optionally bind a custom keyboard shortcut to open these settings directly in the JSON view. This feature is very useful when you need to convert a word that starts with a lowercase to a word that starts with an uppercase. I frequently run into this issue where I need to change the casing from some varaible. Some common scenarios I run into is when converting a renderer function to an actual react component Which strictly uses names starting with an uppercase by convention.

Another scenario is when creating stories in storybook. I would sometimes create a story for a function that renders a react component. But then I decide that the story will just be a react component.

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Remembering that stories now support react hooks out of the box, I use a React. I would have to select the name of the variable that holds the story and manually change it to start with a capital letter to make the error go away.

You can actually use a command called Transform to Title Case inside your shortcuts window by binding a custom keyboard shortcut to it.

Learn React & Material UI - #11 Styling with JSS

It gets really nice in situations where you select multiple occurrences of a selection and transform them all at the same time. Folding a block of code will help you instantly trim down a code block into one line, which will help you quickly jump between code throughout the current file.

From my experience, the benefits start to shine when you have multiple code implementations in a file and you need to direct your focus onto one function or component instantly. You can either endure the long file of code by scrolling through back and forth to focus on the code blocks you want, or you can just quickly fold them to make it easier:.

You can provide a custom highlight color by going into your settings using the JSON modelook for workbench. You can chain the folds so the next parent block will get folded, and it will continue bubbling up each parent. Note 4 : Another way to achieve a similar effect but with words is to use the word wrap tool, in which it will wrap entire lines sort of like the fold effect.

Imagine how it would feel like to search for a file using just your mouse?

classnames vs clsx

VSCode will detect and open up your tsconfig. However, one caveat is that you have to be currently viewing something that is included in the glob pattern in your tsconfig. So basically if you have "include": ["src"] in your tsconfig.

I also like to avoid using my mouse as much as possible to get my way around things as it involves me lifting up my hand away from my keyboard. This will instantly bring you to where that function works with types in TypeScript and many others was defined:. You can actually just put that right into your user snippets, so instead of having to write out or copy and paste the entire thing, you only need to type a custom prefix to generate the snippet that you configured it with.

For example, to create your own snippets file for a TypeScript React project, you can click New Global Snippets Filetype in typescriptreact. With that in place, you can create a new TypeScript file ending with.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Babel plugin to optimize the use of clsxclassnamesand all libraries with a compatible API.

Benchmarks can be found in the benchmark directory. By default the plugin looks for import and require statements for clsx and classnames and uses that to know which function calls to optimize. If you're using another library with a compatible API you can overwrite that with this option. If you want the plugin to match on all functions with a specific name, no matter where it comes from you can specify them using this option.

An example for this is if you have clsx as a global function and thus don't import it. By default the plugin will remove unnecessary function calls and if all calls are removed, imports. If you need to keep them, you can set this option to false.

Writes all function calls, before they are optimized, to a file. Used to help test the plugin on repositories. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. Babel plugin to optimize the use of clsx, classnames, and all libraries with a compatible API. TypeScript JavaScript. TypeScript Branch: master. Find file. Sign in Sign up.

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