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JavaScript vs YAML: What are the differences?


In this article, we will discuss the key differences between JavaScript and YAML. Both languages have different purposes and syntax, and understanding their differences can help developers choose the right tool for their specific needs.

  1. Syntax: JavaScript is a programming language that uses a set of rules for writing code, while YAML is a data serialization language that focuses on simplicity and readability. JavaScript uses a combination of keywords, variables, functions, and operators to create logic, while YAML uses indentation and key-value pairs to define data structures.

  2. Purpose: JavaScript is primarily used for creating interactivity and dynamic behavior on websites. It can be used to manipulate HTML elements, handle user input, and perform calculations. On the other hand, YAML is commonly used as a configuration file format to define settings and parameters for software applications.

  3. Execution: JavaScript code is executed by a JavaScript engine, which is built into web browsers. It can also be run on servers using Node.js. YAML, on the other hand, is a data format that is typically processed by an application or tool that understands YAML syntax.

  4. Flexibility: JavaScript is a full-fledged programming language with support for variables, conditional statements, loops, and other programming constructs. This makes it highly flexible and suitable for complex logic and algorithms. YAML, on the other hand, is simpler and more focused on representing structured data, making it less versatile for complex programming tasks.

  5. Type System: JavaScript has a dynamic and loosely typed system, meaning that variables can hold values of different types and their types can change during runtime. YAML, on the other hand, does not have a built-in type system but relies on the underlying application or tool to interpret the data.

  6. Interoperability: JavaScript is widely supported by web browsers and can be used to create interactive web applications that run on any device with a browser. It is also commonly used for server-side programming and can interact with databases, APIs, and other systems. YAML, on the other hand, is primarily used for configuration purposes and is often used in combination with other languages or tools.

In summary, JavaScript is a versatile programming language used for creating interactivity and logic on websites, while YAML is a simple and readable data serialization language commonly used for configuration purposes. They have different syntax, purposes, execution environments, and levels of flexibility.

Advice on JavaScript and YAML
Needs advice

So, I've been working with all 3 languages JavaScript, Python and Rust, I know that all of these languages are important in their own domain but, I haven't took any of it to the point where i could say I'm a pro at any of these languages. I learned JS and Python out of my own excitement, I learned rust for some IoT based projects. just confused which one i should invest my time in first... that does have Job and freelance potential in market as well...

I am an undergraduate in computer science. (3rd Year)

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Replies (3)

I would start focusing on Javascript because even working with Rust and Python, you're always going to encounter some Javascript for front-ends at least. It has: - more freelancing opportunities (starting to work short after a virus/crisis, that's gonna help) - can also do back-end if needed (I would personally avoid specializing in this since there's better languages for the back-end part) - hard to avoid. it's everywhere and not going away (well not yet)

Then, later, for back-end programming languages, Rust seems like your best bet. Its pros: - it's satisfying to work with (after the learning curve) - it's got potential to grow big in the next year (also with better paying jobs) - it's super versatile (you can do high-perf system stuff, graphics, ffi, as well as your classic api server) It comes with a few cons though: - it's harder to learn (expect to put in years) - the freelancing options are virtually non-existent (and I would expect them to stay limited, as rust is better for long-term software than prototypes)

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I suggest you to go with JavaScript. From my perspective JavaScript is the language you should invest your time in. The community of javascript and lots of framework helps developer to build what they want to build in no time whether it a desktop, web, mobile based application or even you can use javascript as a backend as well. There are lot of frameworks you can start learning i suggest you to go with (react,vue) library both are easy to learn than angular which is a complete framework.

And if you want to go with python as a secondary tool then i suggest you to learn a python framework (Flask,Django).

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Moinul Moin

go for javascript, brother.

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Needs advice

I am currently learning web development with Python and JavaScript course by CS50 Harvard university. It covers python, Flask, Django, SQL, Travis CI, javascript,HTML ,CSS and more. I am very interested in Flutter app development. Can I know what is the difference between learning these above-mentioned frameworks vs learning flutter directly? I am planning to learn flutter so that I can do both web development and app development. Are there any perks of learning these frameworks before flutter?

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Replies (5)
Gagan Jakhotiya
Engineering Manager at BigBasket · | 11 upvotes · 224.5K views

Hey Muhamed, For web development, you'll have to learn how to write backend APIs and how to build UI for browsers, apps, etc. If you're just starting off with programming, I'd suggest you stick to one language and trying developing everything using it to cut the unnecessary learning overhead. Although Python and JavaScript are very similar for beginners, JavaScript is the only available option for both frontend and backend development for a web application. You can start working with Node.js for your API development and Vanilla JS along with HTML/CSS for UI. You'll only need to learn one language to do all of this. Hope this helps.

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Dennis Barzanoff

Flutter is good for everything and it is getting better as I am speaking. Flutter Web is almost ready for production and I have made 2 complex working websites already.

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Yohnathan Carletti
Senior Technical Product Manager · | 3 upvotes · 218.6K views

From a management and hiring perspective, I recommend Flutter (Dart). It provides native solutions to both mobile platform ( (Android and IOS) while having the same knowledge. Hiring managers look at this as an advantage since a developer can provide solutions for both platforms whit the same knowledge. The Flutter framework is growing and there is a lot of resources to ground your knowledge and start experimenting. Dart is also a great language that covers most E2E necessities, so again, no further need of learning one language for FE and another for BE and services. It is my belief that Dart will surpass Kotlin soon, and will leverage to Python and Java in the upcoming year.

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Well. Flutter is just a Framework (just like Django btw.) and it uses Dart as a programming language. Django is kind of solving a different problem than Dart. Dart is intened for use in Front End Applications and Django is a Framework for Back-End Web Development.

So if you want to program Flutter Apps (although i wouldn't recommend it for any serious web development yet since Flutter web isn't very mature yet) i would recommend you just lern Dart.

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If you are interested in Flutter, learn it on your own time, parallel to the course. No matter what order you do them, eventually you will end up learning them all anyway ;-)

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Needs advice

We are converting AWS Lambdas from Java due to excessive cold start times. Usage: These lambdas handle XML and JSON payloads, they use s3, API Gateway, RDS, DynamoDB, and external API's. Most of our developers are only experienced in java. These three languages (Go, Node.js, and Python) were discussed, but no consensus has been reached yet.

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Replies (5)
Jordan Gregory
Cloud Operations Manager at Plainsight AI · | 4 upvotes · 401.5K views

I've worked with all three of these languages and also with Java developers converting to these languages and far and away Go is the easier one to convert to. With the improved cold-start times and the ease of conversion for a Java developer, it is a no-brainer for me.

The hardest part of the conversion though is going to be the lack of traditional Classes so you have to be mindful of that, but Go Structs and interfaces tend to make up for what is lost there.

Full Disclosure: I'm a 95% Go convert (from Python) at this point in time.

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Ahmet Yildirim
Software Engineering Consultant at UXCraft Sweden AB · | 3 upvotes · 401.5K views

Although I am primarily a Javascript developer myself, I used Go to build AWS lambda in a similar scenario to yours. AWS libraries felt better integrated on the Go side, I believe due to the language itself (e.g. how JSON objects are handled in go). Besides that performance of Go is much superior. But on the cons side; community is far smaller around Go, compared to Javascript. That is easy notice if you look at repos of community-maintained libraries for Go. That can feel a bit unreliable.

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Jason Scheirer
Senior Software Engineer at EasyPost · | 2 upvotes · 401.1K views

Go would provide the easiest transition for Java programmers -- its IDE/tooling is second to none (just install Goland) and the deploy/distribution story is extremely clean and lends itself to work well in lambda: single, static binaries with quick startup. No need to set up a full environment or package dependencies on your lambda AMIs, just copy a file.

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Paul Whittemore
Developer and Owner at Appurist Software · | 1 upvotes · 401.1K views

I was initially going to suggest JavaScript due to the smaller size needs of AWS Lambdas code and the larger range of libraries and community available (and to avoid Python for this). But I have to agree with the recommendations and rationale of @ayildirim above and I think you should choose any reasonable language that is low-overhead, fast startup, and best supported by AWS Lambda, and that is probably Go. I don't think you are likely to go wrong with that, while you can potentially with the others.

So I'd agree, on the strength of AWS Lambda support and the solid performance of Go, it seems like your best choice here for Lambdas (and I'm going to need to consider that myself going forward... pardon the pun).

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Russel Werner
Lead Engineer at StackShare · | 1 upvotes · 401K views

If you want to prioritise language familiarity, JavaScript is more like Java than the other choices; and it can be optimised to run very fast. However if you need really fast cold-start times, you can't beat Go since it's compiled. There are other things to consider, such as the massive amount of community packages and help/documentation in the JavaScript ecosystem. Go is newer but seems to be quite popular if you need something that runs fast in a single binary.

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Decisions about JavaScript and YAML
Lucas Litton
Founder & CEO at Macombey · | 8 upvotes · 252.9K views

JavaScript is at the forefront of our entire development approach. Not only do we use different JavaScript frameworks and management tools, but we also use pure vanilla JavaScript to solve simple problems throughout all of our client's builds. JavaScript is a general purpose programming language that can be blazing fast and fun to work with. There's not one project we are working on that doesn't involve it.

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William Artero
Senior Platform Engineer at ABN AMRO · | 6 upvotes · 376.3K views

Telegram Messenger has frameworks for most known languages, which makes easier for anyone to integrate with them. I started with Golang and soon found that those frameworks are not up to date, not to mention my experience testing on Golang is also mixed due to how their testing tool works. The natural runner-up was JS, which I'm ditching in favor of TS to make a strongly typed code, proper tests and documentation for broader usage. TypeScript allows fast prototyping and can prevent problems during code phase, given that your IDE of choice has support for a language server, and build phase. Pairing it with lint tools also allows honing code before it even hits the repositories.

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Andrew Carpenter
Chief Software Architect at Xelex Digital, LLC · | 16 upvotes · 409.2K views

In 2015 as Xelex Digital was paving a new technology path, moving from ASP.NET web services and web applications, we knew that we wanted to move to a more modular decoupled base of applications centered around REST APIs.

To that end we spent several months studying API design patterns and decided to use our own adaptation of CRUD, specifically a SCRUD pattern that elevates query params to a more central role via the Search action.

Once we nailed down the API design pattern it was time to decide what language(s) our new APIs would be built upon. Our team has always been driven by the right tool for the job rather than what we know best. That said, in balancing practicality we chose to focus on 3 options that our team had deep experience with and knew the pros and cons of.

For us it came down to C#, JavaScript, and Ruby. At the time we owned our infrastructure, racks in cages, that were all loaded with Windows. We were also at a point that we were using that infrastructure to it's fullest and could not afford additional servers running Linux. That's a long way of saying we decided against Ruby as it doesn't play nice on Windows.

That left us with two options. We went a very unconventional route for deciding between the two. We built MVP APIs on both. The interfaces were identical and interchangeable. What we found was easily quantifiable differences.

We were able to iterate on our Node based APIs much more rapidly than we were our C# APIs. For us this was owed to the community coupled with the extremely dynamic nature of JS. There were tradeoffs we considered, latency was (acceptably) higher on requests to our Node APIs. No strong types to protect us from ourselves, but we've rarely found that to be an issue.

As such we decided to commit resources to our Node APIs and push it out as the core brain of our new system. We haven't looked back since. It has consistently met our needs, scaling with us, getting better with time as continually pour into and expand our capabilities.

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Aleksandr Filatov
Contract Software Engineer - Microsoft · | 3 upvotes · 206.8K views
How to make your JS code faster just adding some parenthesis?

Optimize-js I will not describe this tool a lot here, because it's already good done by author on github

I just want to mention that this tool wrap up all immediately-invoked functions or likely-to-be-invoked functions in parentheses what is do a great optimization a JavaScript file for faster initial execution and parsing (based on my experience).

The performance of application where I've introduced optimize-js improved on 20% in a common (tested in Chrome and IE11).

Why it happens?

Is it maintaining now? - Unfortunately, no (but feel free to send PR)

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Mike Fiedler
Enterprise Architect at Warby Parker · | 3 upvotes · 226K views

When I was evaluating languages to write this app in, I considered either Python or JavaScript at the time. I find Ruby very pleasant to read and write, and the Ruby community has built out a wide variety of test tools and approaches, helping e deliver better software faster. Along with Rails, and the Ruby-first Heroku support, this was an easy decision.

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Here are all tools and skills you need to have for being among to world's top Full Stack Developers Reviews, critics and suggestions are most welcomed!

  1. HTML and CSS
    • Semantic HTML5 elements
    • Basic CSS (Positioning, Box Models etc)
    • Flexbox & CSS Grid
    • CSS Variables (Custom Properties)
    • Browser Dev Tools
    • Responsive Layout • Set Viewpoint • Fluid Widths • Media Queries • rem over px • Mobile first, stacked columns
    • Saas
  2. Deployment • Namecheap, google domains • FTP, secure FTP • Inmotion, netlify, github
  3. Vanilla JavaScript
    • Basics
    • DOM manipulations and events
    • JSON
    • APIs
    • ES6+
  1. Build Basic Sites
  2. Build UI Layouts
  3. Add dynamic functionality
  4. Deploy and maintain websites

  5. HTML and CSS frameworks - Bootstrap / Materialize / Bulma

  6. Frontend JavaScript Frameworks - React, Vue and Angular

  7. Basic Command Line

    • Git
    • NPM
    • Parcel
    • Gulp
  8. State Management

    • Topics : Immutable State, Store, Reducers, Mutation, Getters, Actions, Observables
    • Tools : Redux, Apollo, VueX, NgRx
  1. Build incredible front-end applications
  2. Smooth and steady front-end workflow
  3. Work well with team and fluent with git
  4. Connect with background API and work with data

  5. Server Side Language

    • Language :
      • Nodejs - Express, Koa
      • PHP - Laravel
      • C# - ASP.NET
      • Python - Django, Flask
      • Go
    • Topics : Basic syntax, structure and workflow, package management, HTTP and Routing
  6. DataBase

    • Relational Database : MySQL, PostGreSQL
    • MongoDB
    • Cloud : Firebase, AWS, Azure
    • Lightweight - SQLite
  7. Server Rendered Pages :

    • Next.js
    • Nuxt.js
    • Angular Universal
  8. Content Management System

    • PHP : WordPress
    • JS : Ghost
    • Python : Mezzazine
    • .NET : Piranha
  9. Misc.

    • Linux
    • Ngnix
    • Digital Ocean
    • Heroku
    • Docker
  1. Setup Full Stack dev environments and workflows
  2. Build back-end APIs & micro services
  3. Work with databases
  4. Construct full stack apps
  5. Deploy to the cloud

Switching to Mobile Development : 1. React Native 2. NativeScript 3. Ionic 4. Flutter 5. Xamarin

Desktop Apps : 1. Electron 2. GraphQL 3. Apollo 4. TypeScript

Lastly, Serverless Architecture

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Subhan Nooriansyah
Full Stack Mobile Developer at AISITS · | 1 upvote · 175.5K views

Websocket is trending this year, but there is another technology similar with Websocket (WS) is Server Sent Event (SSE). Those method have used similar Content-type, SSE is used to text/event-stream and WS is used to binary or text/octet-stream.

The different both of those method is sent. WS is an undirectional sending data both of client and server and SSE is whatever data on server will be push to client.

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Pros of JavaScript
Pros of YAML
  • 1.7K
    Can be used on frontend/backend
  • 1.5K
    It's everywhere
  • 1.2K
    Lots of great frameworks
  • 897
  • 745
    Light weight
  • 425
  • 392
    You can't get a device today that doesn't run js
  • 286
    Non-blocking i/o
  • 237
  • 191
  • 55
    Extended functionality to web pages
  • 49
    Relatively easy language
  • 46
    Executed on the client side
  • 30
    Relatively fast to the end user
  • 25
    Pure Javascript
  • 21
    Functional programming
  • 15
  • 13
  • 12
    Setup is easy
  • 12
    Future Language of The Web
  • 12
    Its everywhere
  • 11
    Because I love functions
  • 11
    JavaScript is the New PHP
  • 10
    Like it or not, JS is part of the web standard
  • 9
    Expansive community
  • 9
    Everyone use it
  • 9
    Can be used in backend, frontend and DB
  • 9
  • 8
    Most Popular Language in the World
  • 8
  • 8
    Can be used both as frontend and backend as well
  • 8
    For the good parts
  • 8
    No need to use PHP
  • 8
    Easy to hire developers
  • 7
    Agile, packages simple to use
  • 7
    Love-hate relationship
  • 7
    Photoshop has 3 JS runtimes built in
  • 7
    Evolution of C
  • 7
    It's fun
  • 7
    Hard not to use
  • 7
  • 7
    Its fun and fast
  • 7
  • 7
    Popularized Class-Less Architecture & Lambdas
  • 7
    Supports lambdas and closures
  • 6
    It let's me use Babel & Typescript
  • 6
    Can be used on frontend/backend/Mobile/create PRO Ui
  • 6
    1.6K Can be used on frontend/backend
  • 6
    Client side JS uses the visitors CPU to save Server Res
  • 6
    Easy to make something
  • 5
  • 5
    Promise relationship
  • 5
    Stockholm Syndrome
  • 5
    Function expressions are useful for callbacks
  • 5
    Scope manipulation
  • 5
  • 5
    Client processing
  • 5
    What to add
  • 4
    Because it is so simple and lightweight
  • 4
    Only Programming language on browser
  • 1
  • 1
    Hard to learn
  • 1
  • 1
    Not the best
  • 1
    Easy to understand
  • 1
    Subskill #4
  • 1
    Easy to learn
  • 0
    Hard 彤
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    Cons of JavaScript
    Cons of YAML
    • 22
      A constant moving target, too much churn
    • 20
      Horribly inconsistent
    • 15
      Javascript is the New PHP
    • 9
      No ability to monitor memory utilitization
    • 8
      Shows Zero output in case of ANY error
    • 7
      Thinks strange results are better than errors
    • 6
      Can be ugly
    • 3
      No GitHub
    • 2
      Be the first to leave a con

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      What is JavaScript?

      JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.

      What is YAML?

      A human-readable data-serialization language. It is commonly used for configuration files, but could be used in many applications where data is being stored or transmitted.

      Need advice about which tool to choose?Ask the StackShare community!

      What companies use JavaScript?
      What companies use YAML?
      See which teams inside your own company are using JavaScript or YAML.
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      What tools integrate with YAML?

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      Blog Posts

      May 6 2020 at 6:34AM


      Oct 24 2019 at 7:43PM


      Oct 11 2019 at 2:36PM


      What are some alternatives to JavaScript and YAML?
      TypeScript is a language for application-scale JavaScript development. It's a typed superset of JavaScript that compiles to plain JavaScript.
      Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.
      Dart is a cohesive, scalable platform for building apps that run on the web (where you can use Polymer) or on servers (such as with Google Cloud Platform). Use the Dart language, libraries, and tools to write anything from simple scripts to full-featured apps.
      It adds syntactic sugar inspired by Ruby, Python and Haskell in an effort to enhance JavaScript's brevity and readability. Specific additional features include list comprehension and de-structuring assignment.
      Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!
      See all alternatives