Software Alternatives & Startups

Codility VS Understanding ES6

Compare Codility VS Understanding ES6 and see what are their differences

Codility

Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

Rating
0 reviews
Understanding ES6

Get started with the new Javascript

Rating
0 reviews
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Codility seems to be more popular. It has been mentioned 2 times since March 2021.

social mentions
2 vs 0
Hiring And Recruitment popularity
100% vs 0%
alternatives listed
240+ vs 13

Base details

Website, pricing, platforms and company facts side by side.

Codility
UES
Understanding ES6
Website codility.com leanpub.com
Pricing —
Platforms
Web Browser
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Listed in

About Codility and Understanding ES6

In their own words, as submitted to SaaSHub.

Codility
UES
Understanding ES6

The Codility platform includes: CodeCheck - Design role-specific remote skills assessments to screen your technical candidates before moving them to the interview stage. CodeLive - Host technical remote or onsite interviews via our shared editor using a range of templates and whiteboards....

Read more about Codility

No description of Understanding ES6 yet.

Features and specs

What each product offers, as listed by its team.

Codility 7 features
UES
Understanding ES6 5 features
  • Automated Assessment
    Codility provides automated coding assessments that save time for both recruiters and candidates by quickly identifying technical abilities.
  • Standardized Testing
    Codility offers standardized tests, ensuring evaluations are consistent and unbiased across all candidates.
  • Diverse Question Bank
    The platform has a large repository of coding problems that cover a wide range of topics and difficulty levels, catering to various roles and expertise levels.
  • Real-Time Code Execution
    Codility allows for real-time code execution and validation, enabling candidates to see the results of their code immediately.
  • Customizable Tests
    Recruiters can create custom tests tailored to the specific needs of their company or position, making the assessments more relevant.
  • Detailed Reports
    Codility provides detailed reports and analytics on candidate performance, helping hiring managers to make data-driven decisions.
  • Integration Capabilities
    The platform integrates with various Applicant Tracking Systems (ATS) and other HR tools, streamlining the recruiting process.

Possible disadvantages

  • Cost
    Codility can be relatively expensive, especially for small companies or startups with limited recruitment budgets.
  • Learning Curve
    There might be a learning curve for both recruiters and candidates to get accustomed to the platform and its features.
  • Language Limitations
    While Codility supports multiple programming languages, some niche or less commonly used languages may not be available.
  • Potential Stress for Candidates
    Automated assessments can induce stress for candidates, which might not accurately reflect their true abilities in a real-world setting.
  • Internet Connection Dependency
    A stable internet connection is required to complete assessments, which can be a limitation in areas with unreliable internet access.
  • Limited Collaboration Features
    Codility's focus on individual assessments means it has limited support for evaluating collaborative or team-based coding skills.
  • Algorithm Focus
    The platform often emphasizes algorithmic problem-solving, which may not fully represent the day-to-day coding skills required for certain positions.
  • Free to read online
    The entire book is available to read for free on Leanpub's website, making it highly accessible to anyone who wants to learn ES6 without any financial commitment.
  • Comprehensive ES6 coverage
    The book provides thorough coverage of all major ES6 features including destructuring, promises, proxies, symbols, iterators, generators, classes, and modules, making it a solid one-stop reference for the specification.
  • Written by a respected authority
    Authored by Nicholas C. Zakas, a well-known and highly respected JavaScript developer and author of several influential JavaScript books, lending credibility and quality to the content.
  • Clear explanations with practical examples
    The book excels at breaking down complex ES6 concepts into understandable explanations accompanied by practical code examples that illustrate how and why each feature should be used.
  • Well-organized structure
    Each chapter focuses on a specific category of ES6 features, making it easy to use both as a sequential learning resource and as a reference guide to look up specific topics as needed.

Possible disadvantages

  • Dated content
    Published around 2016, the book does not cover any features introduced after ES6 (ES2015), such as async/await (ES2017), optional chaining, nullish coalescing, and other modern JavaScript additions, making it increasingly incomplete as a modern JS resource.
  • Assumes prior JavaScript knowledge
    The book is targeted at developers who already have a solid understanding of ES5 JavaScript, which means beginners to JavaScript may struggle to follow along without first learning the fundamentals elsewhere.
  • Limited real-world application examples
    While the book explains individual features well, it sometimes lacks larger, real-world project examples that show how multiple ES6 features work together in practical application development scenarios.
  • No coverage of tooling and ecosystem
    The book focuses purely on the language specification and does not discuss the tooling ecosystem around ES6, such as Babel transpilation, webpack bundling, or how to set up a modern development environment to use these features.
  • Text-heavy learning format
    As a traditional book format, it lacks interactive exercises, quizzes, or hands-on coding challenges that many modern learning platforms offer, which can make it harder for some learners to retain and apply the concepts.

Analysis

An editorial look at what each product does well and who it suits.

Codility
UES
Understanding ES6

No analysis of Codility yet.

Overall verdict

  • Understanding ES6 by Nicholas C. Zakas is a highly regarded, thorough resource that clearly explains the features introduced in ECMAScript 2015 and beyond, making it a solid choice for developers wanting to modernize their JavaScript skills.

Why this product is good

  • Written by Nicholas C. Zakas, a respected authority in the JavaScript community
  • Provides clear, in-depth explanations of ES6 features rather than shallow overviews
  • Includes practical code examples that illustrate real-world usage
  • Covers important topics like let/const, arrow functions, classes, modules, promises, and destructuring
  • Well-organized structure that builds concepts progressively
  • Available free to read online, lowering the barrier to entry

Recommended for

  • Developers with a solid grasp of ES5 who want to learn modern JavaScript
  • Intermediate programmers looking to deepen their understanding of ES6 features
  • Front-end and Node.js developers transitioning to modern syntax and patterns
  • Self-learners who prefer a structured, book-based approach
  • Teams standardizing on ES6+ who need a reliable reference

Videos

Walkthroughs and reviews on video.

Codility 1 video + Add
UES
Understanding ES6 0 videos + Add

An Introduction to Codility: The Tech Hiring Platform for Engineering Teams

No Understanding ES6 videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Codility
UES
Understanding ES6
100% 100%
0% 0%
0% 0%
100% 100%
0% 0%
100% 100%

User comments

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Codility no reviews yet
UES
Understanding ES6 no reviews yet
  • Examining Top 22 Alternatives to LeetCode
    www.inven.ai · Jun 2024

    Codility is a platform that helps companies assess the coding skills of developers. They offer a range of online coding tests and assessments that enable employers to evaluate candidates' technical abilities.

We have no reviews of Understanding ES6 yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Codility 2 mentions
UES
Understanding ES6 0 mentions
  • How to Hire Mobile App Developers
    - Technical skills: have they got the walk to match the talk? Programming languages on a resume mean little if candidates are unable to demonstrate their hard coding skills. You can test these skills with technical skill tests, such as... - Source: dev.to / over 2 years ago
  • Best Websites Every Programmer Should Visit
    Codility : Verify and improve coding skills. - Source: dev.to / over 5 years ago

Tracking Understanding ES6 since Jun 2026.

Alternatives to Codility and Understanding ES6

When comparing Codility and Understanding ES6, you can also consider the following products.