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YUI Compressor VS UglifyJS

Compare YUI Compressor VS UglifyJS and see what are their differences

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YUI Compressor logo YUI Compressor

Yahoo JS/CSS Compressor

UglifyJS logo UglifyJS

JavaScript minifier, beautifier, mangler and parser toolkit.
  • YUI Compressor Landing page
    Landing page //
    2019-08-02
  • UglifyJS Landing page
    Landing page //
    2022-10-30

YUI Compressor features and specs

  • Efficiency
    YUI Compressor is known for its efficient compression, effectively reducing the size of CSS and JavaScript files without significant loss of readability or performance.
  • Cross-Compatibility
    The tool is compatible with different browsers and maintains functionality across various platforms, ensuring wide usability of the compressed files.
  • Error Checking
    YUI Compressor includes a level of error checking that helps identify potential issues during the minification process, helping developers quickly pinpoint and fix errors.
  • Command Line Utility
    Its command line interface is convenient for integrating into build scripts and automation processes, making it a suitable fit for larger projects and teams.

Possible disadvantages of YUI Compressor

  • Limited Modern Features
    YUI Compressor lacks support for newer JavaScript features and syntax, which can be a limitation for modern web development projects using ES6 or later.
  • No Active Maintenance
    As an older project, YUI Compressor is no longer actively maintained or updated, which could pose security risks and compatibility issues with newer technologies.
  • Complexity with Certain Code
    The compressor can sometimes struggle with more complex code or newer coding paradigms, potentially requiring workarounds or manual adjustments to the code.
  • Less Aggressive Compression
    Compared to newer tools, YUI Compressor's compression might not be as aggressive, possibly resulting in slightly larger file sizes than some modern alternatives.

UglifyJS features and specs

  • Minification
    UglifyJS effectively reduces the file size of JavaScript by removing whitespace, shortening variable names, and eliminating unnecessary code, which can lead to faster load times in web applications.
  • Maturity and Stability
    As a mature and well-established tool, UglifyJS has a long history of usage and a strong community, making it a reliable choice for JavaScript minification with less risk of encountering severe bugs.
  • Customization
    UglifyJS offers various options and configurations that allow developers to control the minification process, such as toggling specific optimizations and preserving certain comments.
  • Compression
    Besides minification, UglifyJS provides compression options which further optimize the JavaScript code by evaluating constant expressions and removing unreachable code.

Possible disadvantages of UglifyJS

  • Source Mapping Complexity
    Generating source maps with UglifyJS can sometimes be complex and might not always accurately map minified code back to the original source, complicating debugging efforts.
  • Transformations Side Effects
    Some of the aggressive transformations made by UglifyJS could potentially introduce bugs if the original code relies on exact syntax structure or has side effects that depend on expression evaluation order.
  • Limited ES6+ Support
    Historically, UglifyJS has lagged in support for newer ECMAScript features compared to other modern minifiers, which might cause issues when dealing with ES6+ syntax without transpiling it first.
  • Error Diagnosis
    When errors occur during the minification process, UglifyJS may not always provide clear or detailed error messages, which can make it difficult to diagnose and fix issues.

YUI Compressor videos

+ Add

Using YUI Compressor .NET (Web Optimization)

More videos:

  • Review - YUI Compressor .NET (MSBuild)
  • Review - Como utilizar YUI Compressor

UglifyJS videos

No UglifyJS videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to YUI Compressor and UglifyJS)

YUI Compressor

UglifyJS

Web Application Bundler
44 44%
Web Application Bundler
56% 56
Tool
40 40%
Tool
60% 60
Monitoring Tools
44 44%
Monitoring Tools
56% 56
Assets Bundler
37 37%
Assets Bundler
63% 63

User comments

Share your experience with using YUI Compressor and UglifyJS. For example, how are they different and which one is better?
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Social recommendations and mentions

UglifyJS might be a bit more popular than YUI Compressor. We know about 1 link to it since March 2021 and only 1 link to YUI Compressor. 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.

YUI Compressor mentions (1)

UglifyJS mentions (1)

  • Overview of the next-gen frontend dev tools
    There are many minifiers such as terser and uglify. But, because minifying also require to parse the JS, it is actually possible to use esbuild and SWC to minify the code. Here's a benchmark of the main minifiers. - Source: dev.to / over 2 years ago

What are some alternatives?

When comparing YUI Compressor and UglifyJS, you can also consider the following products

Terser - JavaScript parser, mangler, optimizer and beautifier toolkit for ES6+

JavaScript Obfuscator - JavaScript Obfuscator is a free online tool that obfuscates your source code, preventing it from being stolen and used without permission.

Closure Compiler - The Closure Compiler is a tool for making JavaScript download and run faster.

DomainLockJS - Free code snippet to lock javascript files to your domain. Protect javascript code. Easy cut & paste script. Prevent unauthorized use of your scripts and deter code theft.

Gnirts - Gnirts is a JavaScript library for obfuscating string literals by encoding them as different string literals.

Jscrambler - Jscrambler is a JavaScript protection solution that makes apps self-defensive, resilient against tampering, malware injection, & code theft.

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