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Unused CSS VS Enzyme

Compare Unused CSS VS Enzyme and see what are their differences

Unused CSS logo Unused CSS

Easily find and remove unused CSS rules

Enzyme logo Enzyme

Enzyme is a JavaScript testing utility for React.
  • Unused CSS Landing page
    Landing page //
    2023-03-13
  • Enzyme Landing page
    Landing page //
    2023-10-16

Unused CSS

$ Details
paid Free Trial $29.0 / Monthly (Up to 1000 pages)

Unused CSS features and specs

  • Performance Optimization
    Removing unused CSS can lead to faster page load times, improving user experience and potentially boosting SEO rankings.
  • Reduced File Size
    By eliminating unused CSS, the overall file size of stylesheets is reduced, which can decrease bandwidth usage and server load.
  • Improved Maintainability
    Cleaned-up CSS makes it easier for developers to read and maintain the stylesheet, reducing the complexity of future updates.
  • Fewer Rendering Issues
    By having only the necessary CSS, the likelihood of rendering issues and style conflicts is minimized, ensuring a more consistent design across different browsers and devices.

Possible disadvantages of Unused CSS

  • Potential Over-removal
    There is a risk of mistakenly removing CSS that is conditionally used (e.g., dynamic content or styled via JavaScript), which can lead to broken styles on the website.
  • Initial Setup Complexity
    Setting up tools to analyze and trim unused CSS can be complex, requiring time and technical expertise to configure properly.
  • Regular Maintenance
    Web applications that frequently change or add new content may require ongoing checks to ensure CSS remains optimal, which could increase maintenance efforts.
  • Risk of False Positives
    Automated tools might misidentify CSS as 'unused' if they're used in specific contexts not covered during the analysis phase, potentially leading to functionality issues.

Enzyme features and specs

  • Shallow Rendering
    Allows you to render a component without its children, which speeds up tests and isolates the component being tested.
  • Rich API
    Provides a comprehensive set of APIs that enable deep rendering, traversing, and manipulating of components, making it flexible and powerful for various testing needs.
  • Compatibility with Mocha and Jest
    Easily integrates with popular testing frameworks like Mocha and Jest, ensuring a smooth setup process.
  • Simulate Events
    Supports simulation of user events such as clicks, enabling more realistic interaction testing.
  • Selector Support
    Allows for selecting and finding elements using CSS selectors or component constructors, making it easier to target specific elements in tests.
  • Active Community
    Has a large and active community, which can be a valuable resource for support, plugins, and best practices.

Possible disadvantages of Enzyme

  • Complex Setup
    The initial setup and configuration can be complex, especially for beginners, requiring additional libraries and configurations.
  • Limited Support for New React Features
    Often lags behind in supporting new React features, such as Hooks or the latest Context API, compared to other testing frameworks.
  • Deprecation Warnings
    Issues with deprecation warnings and updates can arise, causing frustrations during maintenance and upgrades.
  • Performance Overhead
    Can be slower compared to other testing libraries, especially when using deep rendering for large components.
  • Inconsistent API
    Some users find the API inconsistent or unintuitive, requiring more effort to learn and use effectively.

Analysis of Enzyme

Overall verdict

  • Enzyme is generally considered a good tool for testing React applications, especially among developers familiar with its API. However, it is worth noting that there has been a shift towards using React Testing Library, which has gained popularity for its focus on testing the application as users would interact with it.

Why this product is good

  • Enzyme is a popular JavaScript testing utility for React that makes it easier to assert, manipulate, and traverse your React Components' output. It provides methods for rendering components, interacting with them, and testing their lifecycle methods, which are essential for writing comprehensive tests for your React applications.

Recommended for

    Enzyme is recommended for developers who are working on React applications and prefer a testing library that provides a more detailed inspection of component internals, or for those maintaining legacy codebases that already rely on Enzyme. If you value testing that emphasizes implementation details, Enzyme can be a good choice.

Unused CSS videos

UnCSS your CSS! Removing Unused CSS with PostCSS & Parcel

More videos:

  • Tutorial - How to Remove Unused CSS code from Joomla Web Pages - 👀 WMW 109

Enzyme videos

Enzymes (Updated)

More videos:

  • Review - Enzymes
  • Review - Over-the-Counter Enzyme Supplements Explained: Mayo Clinic Physician Explains Pros, Cons

Category Popularity

0-100% (relative to Unused CSS and Enzyme)
Design Tools
73 73%
27% 27
Developer Tools
58 58%
42% 42
Development
53 53%
47% 47
Front End Package Manager

User comments

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Social recommendations and mentions

Based on our record, Enzyme should be more popular than Unused CSS. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Unused CSS mentions (1)

  • Top 15 Tools for Frontend Developers: Optimize Your Workflow
    Easily clean up your unused CSS rules with UnusedCSS. This tool scans your stylesheets and identifies CSS rules that are not being used in your project. By removing these unused rules, you can reduce the size of your CSS files, improving load times and overall performance. - Source: dev.to / 11 months ago

Enzyme mentions (3)

  • Top React Testing Libraries in 2025
    Enzyme is a widely-used testing utility that provides robust tools for interacting with and inspecting React components. Its API supports shallow, full, and static rendering, enabling developers to test components in isolation or with their child components. Enzyme also allows testing lifecycle methods, making it ideal for applications with complex state and props interactions. - Source: dev.to / 2 months ago
  • How we have managed to run Enzyme tests with React 18 app.
    Like many other companies with mature software, we found ourselves at a crossroads with our React application. The app, initially developed in early 2019, was built with React 16 and used Enzyme for unit testing. Over the past five years, the app grew, evolved, gained new features, and went though minor and major refactorings. Obviously, as responsible engineers we always maintained unit test coverage around... - Source: dev.to / 7 months ago
  • What would you consider to be a must for a modern 2022 dev stack?
    React testing library instead of enzyme for testing react UIs. I'll never go back. Source: about 3 years ago

What are some alternatives?

When comparing Unused CSS and Enzyme, you can also consider the following products

CSS Peeper - Smart CSS viewer tailored for Designers.

Ava - Making conversations accessible for the deaf

Purgecss - Easily remove unused CSS

react-testing-library - [`React Testing Library`][gh] builds on top of `DOM Testing Library` by adding

Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.

EyeJS - A JavaScript testing framework for the real world.