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RegExr VS UglifyJS

Compare RegExr VS UglifyJS and see what are their differences

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RegExr logo RegExr

RegExr.com is an online tool to learn, build, and test Regular Expressions.

UglifyJS logo UglifyJS

JavaScript minifier, beautifier, mangler and parser toolkit.
  • RegExr Landing page
    Landing page //
    2023-07-28
  • UglifyJS Landing page
    Landing page //
    2022-10-30

RegExr features and specs

  • User-Friendly Interface
    RegExr offers an intuitive and visually appealing interface that makes it easy for users to write, test, and understand regular expressions.
  • Real-time Feedback
    Changes to the regular expression and input text are reflected immediately, allowing users to see the effects of their adjustments in real-time.
  • Built-in Cheatsheet
    RegExr includes a handy cheatsheet that provides quick access to common regex patterns and syntax, making it easier for users to learn and reference rules.
  • Community Examples
    Users can explore and share community-generated regex patterns, which can serve as valuable examples or starting points for creating their own regex.
  • Detailed Explanation
    Each part of the regex pattern can be hovered over to display detailed tooltips explaining its function, aiding in the understanding of complex expressions.
  • Cross-Platform Accessibility
    As a web-based tool, RegExr can be accessed from any modern browser without the need for installation, making it convenient to use on multiple devices.

Possible disadvantages of RegExr

  • Limited Offline Use
    Since RegExr is a web-based application, it requires an internet connection, limiting its utility for users who need to work offline.
  • Learning Curve
    While the tool is user-friendly, users still need to have a foundational understanding of regular expressions to use RegExr effectively.
  • Performance Issues
    For extremely large inputs or very complex regular expressions, the tool may experience performance lags or slowdowns.
  • Limited Advanced Features
    RegExr may lack some advanced features found in more specialized or professional regex tools, such as integration with development environments or extensive scripting capabilities.
  • Privacy Concerns
    Users inputting sensitive data need to be cautious, as the web-based nature of the tool could raise privacy or data security concerns.

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.

Category Popularity

0-100% (relative to RegExr and UglifyJS)

RegExr

UglifyJS

Programming Tools
100 100%
Programming Tools
0% 0
Web Application Bundler
0 0%
Web Application Bundler
100% 100
Regular Expressions
100 100%
Regular Expressions
0% 0
Tool
0 0%
Tool
100% 100

User comments

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Social recommendations and mentions

Based on our record, RegExr seems to be a lot more popular than UglifyJS. While we know about 367 links to RegExr, we've tracked only 1 mention of UglifyJS. 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.

RegExr mentions (367)

  • The importance of the environment in Regex pattern matching
    However - here it becomes weird - when testing the original regex rule (the first one, without the \u00A0 part) on the same string in an interactive visualiser (https://regexr.com/ for instance), there is a match:. - Source: dev.to / 7 months ago
  • Ask HN: How did you learn Regex?
    Learned regex in the 90's from the Perl documentation, or possibly one of the oreilly perl references. That was a time where printed language references were more convenient than searching the internet. Perl still includes a shell component for accessing it's documentation, that was invaluable in those ancient times. Perl's regex documentation is rather fantastic. `perldoc perlre` from your terminal. Or... - Source: Hacker News / 10 months ago
  • Ask HN: How did you learn Regex?
    I read a lot on https://www.regular-expressions.info and experimented on https://rubular.com since I was also learning Ruby at the time. https://regexr.com is another good tool that breaks down your regex and matches. One of the things I remember being difficult at the beginning was the subtle differences between implementations, like `^` meaning "beginning of line" in Ruby (and others) but meaning "beginning of... - Source: Hacker News / 10 months ago
  • Ask HN: How did you learn Regex?
    Mostly building things that needed complex RegEx, and debugging my regular expressions with https://regexr.com/. - Source: Hacker News / 10 months ago
  • Form Validation In TypeScipt Projects Using Zod and React Hook Form
    For username: You are using the min() function to make sure the characters are not below three and, then the max() function checks that the characters are not beyond twenty-five. You also make use of Regex to make sure the username must contain only letters, numbers, and underscore. - Source: dev.to / 10 months ago
View more

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 RegExr and UglifyJS, you can also consider the following products

regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.

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

rubular - A ruby based regular expression editor

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

Expresso - The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer with an extensive knowledge of regular expressions.

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

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